CN114696668A

CN114696668A - Drive control circuit, drive control method, circuit board and air conditioner

Info

Publication number: CN114696668A
Application number: CN202011636871.4A
Authority: CN
Inventors: 江海昊; 黄招彬; 龙谭; 张杰楠; 曾贤杰; 赵鸣; 徐锦清; 堀部美彦; 井上薰
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01

Abstract

The embodiment of the invention discloses a drive control circuit, a drive control method, a circuit board and an air conditioner, wherein the drive control circuit is connected with a first power module and a second power module through two ends of an open winding motor, the second power module is connected with an energy storage module, and the energy storage module is respectively connected with a second input end and a power connection end, so that current input from the power input end can supply power to the open winding motor and can directly charge the energy storage module, the control loss is reduced, the working state of the drive control circuit can be controlled by controlling the first power module and the second power module, electric energy can flow in two directions when the motor runs, the energy storage module can supply power to the open winding motor under the condition of sufficient energy, the running voltage of the motor is improved, and the running efficiency of the motor is improved.

Description

Drive control circuit, drive control method, circuit board and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a drive control circuit, a drive control method, a circuit board and an air conditioner.

Background

The air conditioner is a household appliance commonly used in daily life of people, the compressor is an important component of the air conditioner, and the energy consumption of the compressor accounts for a large proportion of the total energy consumption of the air conditioner. Therefore, the efficiency of the compressor is improved, and the whole energy efficiency of the air conditioner is improved obviously. The driving motor of the compressor is generally a permanent magnet synchronous motor, and because the voltage of a power supply is generally fixed and is limited by the voltage of a direct current bus, the compressor is easy to be subjected to voltage saturation in a high-load state and enter weak magnetic control in advance, so that the running efficiency of the motor is reduced.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a drive control circuit, a drive control method, a circuit board and an air conditioner, which can improve the operation efficiency of a motor.

In a first aspect, an embodiment of the present invention provides a drive control circuit, configured to drive an open-winding motor having three-phase windings, where one end of each phase of the winding forms a first three-phase outgoing line group, and the other end of each phase of the winding forms a second three-phase outgoing line group, where the drive control circuit includes:

the first power module comprises a first input end and a first output end, and the first output end is connected with the first three-phase outgoing line group;

the second power module comprises a second input end and a second output end, and the second output end is connected with the second three-phase outgoing line group;

the power supply connecting end is used for connecting a power supply and is connected with the first input end;

the energy storage module is respectively connected with the second input end and the power supply connecting end;

and the controller is respectively connected with the first power module and the second power module.

The drive control circuit provided by the embodiment of the invention at least has the following beneficial effects: first power module and second power module are connected through opening winding motor both ends, and second power module is connected with energy storage module, and energy storage module respectively with the second input with power connection end connects, consequently, the electric current of following the input of power both can be to opening winding motor power supply, also can directly charge for energy storage module, thereby reduce the control loss, and, can control drive control circuit's operating condition through controlling first power module and second power module, make the electric energy can two-way flow when the motor moves, energy storage module can be to opening winding motor power supply under the abundant condition of energy, improve the operating voltage of motor, promote the operating efficiency of motor.

In some embodiments of the present invention, the drive control circuit further comprises:

and the switch module is used for controlling the on-off between at least one of the first input end and the second input end and the power supply connecting end, and is connected with the controller.

In the technical scheme, the switch module is arranged to control the on-off between at least one of the first input end and the second input end and the power connection end, and the open winding motor can be isolated from the power supply to operate independently under the condition that the energy storage module supplies power to the open winding motor, so that the control loss of the open winding motor is reduced.

In some embodiments of the present invention, the switch module includes a first switch, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, and the first switch is respectively connected to the first input terminal and the common terminal;

or the switch module comprises a first switch, the energy storage module and the first input end are connected with the power supply connection end through a common end, and the first switch is respectively connected with the energy storage module and the common end;

or, the switch module comprises a first switch, and the first switch is connected between the second input end and the energy storage module.

In the above technical scheme, the switch module includes first switch, and first switch can set up in different positions, can be according to the closure or the disconnection of the first switch of energy storage module's electric quantity condition control for energy storage module can supply power to the open winding motor alone, or can supply power to the open winding motor simultaneously together with the power, or the power can charge to energy storage module.

In some embodiments of the invention, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, wherein:

the switch module comprises a first switch and a second switch, the first switch is respectively connected with the first input end and the common end, and the second switch is respectively connected with the energy storage module and the common end;

or, the switch module comprises a first switch, and the first switch is respectively connected with the power connection end and the common end.

In the technical scheme, the switch module can be controlled to be switched on or switched off according to the electric quantity condition of the energy storage module, so that the energy storage module can independently supply power to the open winding motor, or can supply power to the open winding motor together with the power supply, or the power supply can charge the energy storage module. And after the switch module is disconnected, the open winding motor can be completely isolated from the power supply connecting end, and the control loss is favorably reduced.

In a second aspect, an embodiment of the present invention further provides a driving control method, which is applied to a driving control circuit, where the driving control circuit is configured to drive an open winding motor having three-phase windings, one end of each phase of the winding forms a first three-phase outgoing line group, and the other end of each phase of the winding forms a second three-phase outgoing line group, the driving control circuit includes a first power module, a second power module, a power connection end, an energy storage module, and a controller, the first power module includes a first input end and a first output end, the first output end is connected to the first three-phase outgoing line group, the second power module includes a second input end and a second output end, the second output end is connected to the second three-phase outgoing line group, the power connection end is connected to the first input end, and the energy storage module is connected to the second input end and the power connection end respectively, the controller is respectively connected with the first power module and the second power module;

the drive control method includes:

acquiring the electric quantity of the energy storage module;

and sending control signals to the first power module and the second power module according to the electric quantity so as to change the working state of the drive control circuit.

The drive control method provided by the embodiment of the invention at least has the following beneficial effects: through the electric quantity of obtaining energy storage module, utilize the controller to send control signal to first power module and second power module according to energy storage module's electric quantity in order to change drive control circuit's operating condition for the electric energy can two-way flow when the motor operation, and energy storage module can be to the open winding motor power supply under the sufficient condition of energy, improves the operating voltage of motor, promotes the operating efficiency of motor.

In some embodiments of the present invention, each of the first power module and the second power module includes three bridge arms connected in parallel, each of the bridge arms includes two switching tubes connected in series, and the sending of the control signal to the first power module and the second power module according to the electric quantity to change the operating state of the driving control circuit includes one of:

when the electric quantity is larger than a preset electric quantity threshold value, respectively sending PWM pulse signals to six switching tubes of the second power module, and switching on the switching tube of an upper half-bridge of the first power module or switching on the switching tube of a lower half-bridge of the first power module;

and when the electric quantity is greater than a preset electric quantity threshold value, respectively sending PWM pulse signals to the six switching tubes of the first power module and the second power module.

In the above technical solution, when the electric quantity of the energy storage module is greater than a preset electric quantity threshold, it indicates that the electric quantity of the energy storage module is sufficient, at this time, PWM pulse signals may be sent to the six switching tubes of the second power module, respectively, to turn on the switching tubes of the upper half-bridge of the first power module or turn on the switching tubes of the lower half-bridge of the first power module, and the energy storage module separately supplies power to the open-winding motor; or, the PWM pulse signals may be sent to the six switching tubes of the first power module and the second power module, respectively, and the energy storage module and the power supply power to the open-winding motor together.

In some embodiments of the present invention, the sending a control signal to the first power module and the second power module according to the electric quantity to change an operating state of the driving control circuit further includes:

when the electric quantity is smaller than or equal to the electric quantity threshold value, PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tubes of the upper half bridge of the second power module or the switch tubes of the lower half bridge of the second power module are switched on.

In the above technical scheme, when the electric quantity of the energy storage module is less than or equal to the preset electric quantity threshold value, it indicates that the electric quantity of the energy storage module is insufficient, at this time, the first power module can send the PWM pulse signal to the six switching tubes respectively, and the switching tube of the upper half-bridge of the second power module or the switching tube of the lower half-bridge of the second power module is switched on, and only the power supply supplies power to the open-winding motor, at this time, because the energy storage module is directly connected with the power supply, the power supply can also charge the energy storage module.

In some embodiments of the present invention, the driving control circuit further includes a switch module, the switch module includes a first switch, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, and the first switch is respectively connected to the first input terminal and the common terminal;

the sending of the control signal to the first power module and the second power module according to the electric quantity to change the working state of the driving control circuit includes:

when the electric quantity is larger than a preset electric quantity threshold value, the on-off of the first switch is controlled according to the load quantity parameter of the open winding motor, and a control signal is sent to the first power module and the second power module to change the working state of the driving control circuit.

In the above technical scheme, when the electric quantity of the energy storage module is greater than the preset electric quantity threshold value, it is indicated that the electric quantity of the energy storage module is sufficient, at this time, the on-off of the first switch can be controlled according to the load quantity parameter of the open winding motor, and a control signal is sent to the first power module and the second power module to change the working state of the driving control circuit, so that whether the energy storage module and the power supply together supply power to the open winding motor or the energy storage module supplies power alone can be selected according to the load quantity parameter of the open winding motor.

In some embodiments of the present invention, each of the first power module and the second power module includes three parallel-connected bridge arms, each of the bridge arms includes two switching tubes connected in series, the load parameter includes a required rotation speed of the open-winding motor, the on-off of the first switch is controlled according to the load parameter of the open-winding motor, and a control signal is sent to the first power module and the second power module to change a working state of the driving control circuit, where the control signal includes at least one of:

when the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, disconnecting the first switch, sending PWM pulse signals to the six switching tubes of the second power module respectively, and switching on the switching tube of the upper half-bridge of the first power module or switching on the switching tube of the lower half-bridge of the first power module;

and when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, closing the first switch, and respectively sending PWM pulse signals to the six switching tubes of the first power module and the second power module.

In the above technical solution, when the required rotation speed of the open-winding motor is less than or equal to a preset rotation speed threshold, indicating that the load demand is low, the first switch may be turned off, PWM pulse signals may be sent to the six switching tubes of the second power module, respectively, the switching tube of the upper half-bridge of the first power module is turned on or the switching tube of the lower half-bridge of the first power module is turned on, at this time, the energy storage module alone supplies power to the open-winding motor, and the open-winding motor operates in a star connection; when the required rotating speed of the open winding motor is greater than a preset rotating speed threshold value, the load requirement is high, the first switch can be closed at the moment, the PWM pulse signals are respectively sent to the first power module and the six switch tubes of the second power module, the energy storage module and the power supply power to the open winding motor at the moment, and the open winding motor works in open winding connection.

when the electric quantity is smaller than or equal to the electric quantity threshold value, the first switch is closed, PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tube of the upper half-bridge of the second power module is conducted or the switch tube of the lower half-bridge of the second power module is conducted.

In the above technical scheme, when the electric quantity of the energy storage module is less than or equal to the electric quantity threshold value, it indicates that the electric quantity of the energy storage module is insufficient, at this time, the first switch can be closed, to six of the first power module the switching tubes respectively send PWM pulse signals, turn on the switching tubes of the upper half-bridge of the second power module or turn on the switching tubes of the lower half-bridge of the second power module, the power supply independently supplies power to the open-winding motor, and the power supply simultaneously charges for the energy storage module, and the open-winding motor works in star connection.

In some embodiments of the present invention, the driving control circuit further includes a switch module, the switch module includes a first switch, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, and the first switch is respectively connected to the energy storage module and the common terminal;

and when the electric quantity is greater than a preset electric quantity threshold value, the first switch is switched off, and control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the drive control circuit.

In the technical scheme, when the electric quantity of the energy storage module is larger than the preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be switched off, the power supply does not need to charge the energy storage module, and then control signals are sent to the first power module and the second power module according to the load quantity parameter of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply power to the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameter of the open winding motor.

In some embodiments of the present invention, each of the first power module and the second power module includes three parallel-connected bridge arms, each of the bridge arms includes two switching tubes connected in series, the load parameter includes a required rotation speed of the open-winding motor, and the sending of the control signal to the first power module and the second power module according to the load parameter of the open-winding motor to change the operating state of the driving control circuit includes at least one of:

when the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, sending PWM pulse signals to six switching tubes of the second power module respectively, and conducting the switching tube of an upper half-bridge of the first power module or conducting the switching tube of a lower half-bridge of the first power module;

and when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, PWM pulse signals are respectively sent to the six switching tubes of the first power module and the second power module.

In the above technical solution, when the required rotation speed of the open-winding motor is less than or equal to a preset rotation speed threshold, indicating that the load demand is low, at this time, PWM pulse signals may be sent to the six switching tubes of the second power module, respectively, to turn on the switching tubes of the upper half-bridge of the first power module or turn on the switching tubes of the lower half-bridge of the first power module, at this time, the energy storage module alone supplies power to the open-winding motor, and the open-winding motor operates in a star connection; when the required rotating speed of the open winding motor is greater than a preset rotating speed threshold value, the load requirement is high, at the moment, PWM pulse signals can be respectively sent to the six switch tubes of the first power module and the second power module, at the moment, the energy storage module and the power supply power to the open winding motor together, and the open winding motor works in open winding connection.

when the electric quantity is smaller than or equal to the electric quantity threshold value, the first switch is closed, PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tube of the upper half bridge of the second power module is conducted or the switch tube of the lower half bridge of the second power module is conducted.

In some embodiments of the present invention, the driving control circuit further comprises a switch module, the switch module comprises a first switch, and the first switch is connected between the second input end and the energy storage module;

and when the electric quantity is greater than a preset electric quantity threshold value, closing the first switch, and sending a control signal to the first power module and the second power module according to the load quantity parameter of the open winding motor so as to change the working state of the drive control circuit.

In the technical scheme, when the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be closed, and then control signals are sent to the first power module and the second power module according to the load quantity parameter of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply power to the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameter of the open winding motor.

and when the electric quantity is smaller than or equal to the electric quantity threshold value, the first switch is disconnected, PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tube of the upper half-bridge of the second power module is switched on or the switch tube of the lower half-bridge of the second power module is switched on.

In the above technical solution, when the electric quantity of the energy storage module is less than or equal to the electric quantity threshold, it indicates that the electric quantity of the energy storage module is insufficient, at this time, the first switch may be turned off, to six of the first power module the switching tubes respectively transmit PWM pulse signals, turn on the switching tubes of the upper half-bridge of the second power module or turn on the switching tubes of the lower half-bridge of the second power module, the power supply supplies power to the open-winding motor alone, and the power supply charges for the energy storage module at the same time, and the open-winding motor works in star connection. And because the first switch is disconnected, the energy storage module is completely isolated from the open winding motor in the charging process, and the control loss is favorably reduced.

In some embodiments of the present invention, each of the first power module and the second power module includes three bridge arms connected in parallel, each of the bridge arms includes two switching tubes connected in series, the driving control circuit further includes a switching module, and the energy storage module and the first input end are connected to the power connection end through a common end;

or, the switch module includes a first switch, and the first switch is respectively connected to the power connection end and the common end;

the sending of the control signal to the first power module and the second power module according to the electric quantity to change the working state of the driving control circuit includes at least one of:

and when the electric quantity is greater than a preset electric quantity threshold value, the switch module is disconnected, PWM pulse signals are respectively sent to the six switch tubes of the second power module, and the switch tube of the upper half bridge of the first power module is switched on or the switch tube of the lower half bridge of the first power module is switched on.

When the electric quantity is smaller than or equal to a preset electric quantity threshold value, the switch module is closed, PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tube of the upper half-bridge of the second power module is switched on or the switch tube of the lower half-bridge of the second power module is switched on.

In the above technical solution, when the electric quantity of the energy storage module is greater than the preset electric quantity threshold, it indicates that the electric quantity of the energy storage module is sufficient, at this time, the switching module may be turned off, PWM pulse signals are respectively sent to the six switching tubes of the second power module, the switching tube of the upper half-bridge of the first power module is turned on or the switching tube of the lower half-bridge of the first power module is turned on, at this time, the energy storage module alone supplies power to the open-winding motor, the open-winding motor operates in a star connection, and the open-winding motor is completely isolated from the power supply after the switching module is turned off, which is beneficial to reducing control loss; when the electric quantity of the energy storage module is smaller than or equal to the preset electric quantity threshold value, the electric quantity of the energy storage module is insufficient, the switch module can be closed at the moment, the six switch tubes of the first power module respectively send PWM pulse signals to conduct the upper half bridge of the second power module, or the switch tubes of the lower half bridge of the second power module are conducted, the switch tubes are independently supplied with power to the open winding motor through the power supply, the power supply is simultaneously charged for the energy storage module, and the open winding motor works in star connection.

In a third aspect, an embodiment of the present invention further provides a circuit board, including the driving control circuit described in the first aspect, therefore, the circuit board is connected with the first power module and the second power module at two ends of the open-winding motor, the second power module is connected with the energy storage module, and the energy storage module is respectively connected with the second input end and the power supply connecting end, therefore, the current input from the power supply input end can not only supply power to the open-winding motor, but also can directly charge the energy storage module, thereby reducing the control loss, and controlling the operating state of the drive control circuit by controlling the first power module and the second power module, the electric energy can flow in two directions when the motor operates, the energy storage module can supply power to the open winding motor under the condition of sufficient energy, the operating voltage of the motor is improved, and the operating efficiency of the motor is improved.

In a fourth aspect, an embodiment of the present invention further provides an air conditioner, including the circuit board described in the third aspect, or including a memory and a processor, where the memory stores a computer program, and the processor implements the drive control method described in the second aspect when executing the computer program, so that the air conditioner connects the first power module and the second power module at two ends of the open-winding motor, and the second power module is connected with the energy storage module, and the controller is used to send a control signal to the first power module and the second power module according to an electric quantity of the energy storage module to change a working state of the drive control circuit, so that the electric energy can flow in two directions when the motor operates, and the energy storage module can supply power to the open-winding motor when the energy is sufficient, thereby improving an operating voltage of the motor and improving an operating efficiency of the motor.

In a fifth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where the storage medium stores a program, and the program is executed by a processor to implement the drive control method according to the second aspect.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic structural diagram of a driving control circuit provided in an embodiment of the present invention (no switch module, common dc bus);

fig. 2 is another schematic structural diagram of a driving control circuit provided in an embodiment of the present invention (no switch module, common ac bus);

fig. 3 is a schematic structural diagram of a first power module/a second power module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram (battery) of an energy storage module provided by the embodiment of the invention;

fig. 5 is another schematic structural diagram (capacitor) of the energy storage module according to the embodiment of the invention;

fig. 6 is a schematic diagram of another structure of an energy storage module (battery + capacitor) according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an energy storage module according to another embodiment of the present invention (capacitor + bridge arm + inductor + battery);

fig. 8 is a schematic diagram illustrating switching of an operating state of a driving control circuit according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a current flow when the energy storage module according to the embodiment of the invention is charged;

fig. 10 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common dc bus are disposed between the first input terminal and the common terminal);

fig. 11 is a schematic structural diagram (single pole single throw) of a switch module provided by an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a switch module according to an embodiment of the present invention (another connection mode of single pole and single throw);

fig. 13 is a schematic structural diagram (double pole double throw) of a switch module provided in an embodiment of the present invention;

fig. 14 is another schematic structural diagram of a driving control circuit according to an embodiment of the present invention (a switch module and a common ac bus are disposed between a first input end and a common end);

fig. 15 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common dc bus are disposed between the energy storage module and the common terminal);

fig. 16 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common ac bus are disposed between the energy storage module and the common terminal);

fig. 17 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common dc bus are disposed between the energy storage module and the second input end);

fig. 18 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common ac bus are disposed between the energy storage module and the second input end);

fig. 19 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common ac bus are disposed between the power connection terminal and the common terminal);

fig. 20 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a switch module and a common dc bus are disposed between the power connection terminal and the common terminal);

fig. 21 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a first switch and a second switch are correspondingly disposed between the common terminal and the first input terminal, and between the common terminal and the energy storage module, and a common dc bus is provided);

fig. 22 is another schematic structural diagram of the driving control circuit according to the embodiment of the present invention (a first switch and a second switch are correspondingly disposed between the common terminal and the first input terminal, and between the common terminal and the energy storage module, and a common ac bus is provided);

fig. 23 is a flowchart of a drive control method provided by an embodiment of the present invention;

fig. 24 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be understood that in the description of the embodiments of the present invention, a plurality (or a plurality) means two or more, more than, less than, more than, etc. are understood as excluding the number, and more than, less than, etc. are understood as including the number. If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.

The air conditioner is a household appliance commonly used in daily life of people, the compressor is an important component of the air conditioner, and the energy consumption of the compressor accounts for a large proportion of the total energy consumption of the air conditioner. Therefore, the efficiency of the compressor is improved, and the whole energy efficiency of the air conditioner is improved obviously. The driving motor of the compressor is generally a permanent magnet synchronous motor, and in order to improve the efficiency of the motor, the back electromotive force coefficient of the motor needs to be improved as much as possible, but is limited by the direct current bus voltage, and the improvement of the back electromotive force coefficient can cause the compressor to be saturated in voltage under a high load state, so that the motor can enter weak magnetic control in advance, and the operating efficiency of the motor is reduced.

Based on this, the embodiment of the invention provides a drive control circuit, a drive control method, a circuit board and an air conditioner, which can improve the operation efficiency of a motor.

Referring to fig. 1, an embodiment of the present invention provides a driving control circuit for driving an open-winding motor having three-phase windings, where one end of each phase winding forms a first three-phase outgoing line group 1100, and the other end of each phase winding forms a second three-phase outgoing line group 1200, the driving control circuit includes a first power module, a second power module, a power connection end 1700, and an energy storage module, the first power module includes a first input end 1300 and a first output end 1400, the first output end 1400 is connected to the first three-phase outgoing line group 1100, the second power module includes a second input end 1600 and a second output end 1500, the second output end 1500 is connected to the second three-phase outgoing line group 1200, the power connection end 1700 is used for connecting a power source, the power connection end 1700 is connected to the first input end 1300, and the energy storage module is respectively connected to the second input end 1600 and the power connection end 1700.

It can be understood that the power connection end 1700 is connected to a power supply, the first input terminal 1300 and the second input terminal 1600 are both provided with a positive bus input terminal and a ground terminal, the first output terminal 1400 and the second output terminal 1500 are both three-phase output terminals, the positive bus and the negative bus of the power supply are correspondingly connected to the positive bus input terminal and the ground terminal of the first input terminal 1300, the positive bus and the ground terminal of the energy storage module are correspondingly connected to the positive bus input terminal and the ground terminal of the second input terminal 1600, the three-phase output terminal of the first output terminal 1400 is correspondingly connected to the first three-phase outgoing line group 1100 of the open winding motor, and the three-phase output terminal of the second output terminal 1500 is correspondingly connected to the second three-phase outgoing line group 1200 of the open winding motor.

It can be understood that, referring to fig. 1, the power source may be an ac power source + an ac-dc converter, and two output terminals of the ac-dc converter are correspondingly connected to the power connection terminal 1700, wherein a positive bus and a negative bus of the ac power source are correspondingly connected to two input terminals of the ac-dc converter, in this case, the charging loop of the energy storage module and the power supply loop of the open-winding motor form a connection of a common dc bus, which is beneficial to improve the safety of the circuit. In addition, referring to fig. 2, the number of the ac/dc converters may also be two, the power input ends are disposed between the ac power source and the ac/dc converter, the power connection end 1700 is connected to the first input end 1300 through one of the ac/dc converters, and the power connection end 1700 is connected to the energy storage module through the other ac/dc converter.

Of course, the power supply may also be a single ac power supply or a single dc power supply, and the embodiment of the present invention is not limited.

It can be understood that the embodiment of the present invention may further be provided with a controller, where the controller is respectively connected to the first power module and the second power module, and is used to control the actions of the first power module and the second power module.

It can be understood that the driving control circuit may further include a capacitor device C, the capacitor device C is connected in parallel between the power connection end 1700 and the first power module, and by providing the capacitor device C, the electric energy of the power supply may be stored, and the signal of the power connection end 1700 may be filtered, so that the operation of the open-winding motor is more stable.

Referring to fig. 3, each of the first power module and the second power module includes three parallel-connected bridge arms, each of which includes two switching tubes connected in series, where the switching tubes may be MOSFETs (Metal-Oxide-Semiconductor Field-Effect transistors) or IGBTs (Insulated Gate Bipolar transistors).

Referring to fig. 4 to 7, the energy storage module may be any one of a battery, a capacitor, a battery + a capacitor, a capacitor + a bridge arm + an inductor + a battery. If the energy storage module is a battery, a positive bus and a ground wire of the battery are correspondingly connected with a positive bus input end and a ground end, and the positive bus and the ground wire of the battery are respectively connected with a power supply input end; if the energy storage module is a capacitor, a positive bus and a ground wire of the capacitor are correspondingly connected with the positive bus input end and the ground end of the second input end 1600, and the positive bus and the ground wire of the capacitor are respectively connected with the power supply input end; if the energy storage module is a battery + capacitor, the battery and the capacitor are connected in parallel, a positive bus and a ground wire of the battery and the capacitor are correspondingly connected with a positive bus input end and a ground end of the second input end 1600, and meanwhile, the positive bus and the ground wire of the battery and the capacitor are respectively connected with a power supply input end; if the energy storage module is a capacitor + a bridge arm + an inductor + a battery, the capacitor comprises a first capacitor C1 and a second capacitor C2, the bridge arm comprises two switching tubes which are connected in series, the first capacitor C1 is connected in parallel with the bridge arm, the second capacitor C2 and the battery are both connected in parallel to a half-bridge switching tube under the bridge arm, one end of the inductor is connected between the two switching tubes, the other end of the inductor is connected with a positive bus of the battery, the positive bus and a ground wire of the first capacitor C1 are correspondingly connected with a positive bus input end and a ground end of the second input end 1600, the positive bus and the ground wire of the first capacitor C1 are respectively connected with a power supply input end, and the two switching tubes of the bridge arm of the energy storage module are respectively connected with the controller.

It is understood that the first power module or the second power module has the following three operating states:

OFF state: the switching tubes of the upper half bridge and the lower half bridge are in an off state;

normal modulation state: the PWM pulse signals are respectively sent to the six switching tubes, the driving waveforms of the switching tubes are obtained by modulating the duty ratios obtained by calculation of the controller, or the controller can directly control the switching tubes through the calculated switching states;

half-bridge modulation state: switching tubes of an upper half bridge of a first power module (or a second power module) or switching tubes of a lower half bridge of the first power module (or the second power module) are conducted, wherein two specific modes can be provided, the first mode is that a controller determines the switching of six switching tubes according to the flow direction of three-phase current (the frequency of the switching tubes and the current fundamental frequency belong to the same level), the switching state of the switching tubes is adjusted to enable N points of an open winding motor (the intersection point of the three-phase current on the corresponding power module side) to alternately appear on a positive bus and a negative bus of the first power module or the second power module, and in order to enable the N points of the open winding motor to alternately appear on the positive bus of the first power module or the second power module, at least the upper half bridge with the corresponding phase of the current flowing from the first power module or the second power module to the open winding motor needs to be switched on; to alternately present the N points of the open-winding motor to the negative bus of the first power module or the second power module, at least the lower half-bridge of the corresponding phase of current flowing from the first power module or the second power module to the open-winding motor needs to be turned on. The second way is to switch on all three switching tubes of the upper half-bridge or all three switching tubes of the lower half-bridge. In this state, the first three-phase outlet line group 1100 of the open-winding motor is connected, or the second three-phase outlet line group 1200 is connected, so that the open-winding motor is in a star connection.

If the first mode is selected, when the switching tubes of the first power module and the second power module adopt MOSFETs, the switching modes of the six switching tubes are as follows: the switching mode of alternately switching on the switching tube of the upper half-bridge and switching on the switching tube of the lower half-bridge at a certain frequency is favorable for reducing the conduction loss, so that the switching tubes of the upper half-bridge and the lower half-bridge are balanced in heating, the working reliability is improved, and the service life of the switching tubes is prolonged; when the switching tubes of the first power module and the second power module adopt IGBTs, if the forward conduction voltage drop of the IGBTs when the IGBTs are switched on is smaller than the conduction voltage drop of the reverse through-current, the upper half bridge of the corresponding phase of the current flowing to the open-winding motor can be conducted, and the lower half bridge of the corresponding phase of the current flowing to the open-winding motor can be conducted; if the forward conduction voltage drop when the IGBT is turned on is approximately equal to the conduction voltage drop of the reverse through-current, no redundant switch needs to be turned on, for example, if the open-winding motor N point appears alternately on the positive bus of the first power module or the second power module, at least the upper half bridge of the corresponding phase of the current flowing from the first power module or the second power module to the open-winding motor needs to be turned on; to alternately present the N points of the open-winding motor to the negative bus of the first power module or the second power module, at least the lower half-bridge of the corresponding phase of current flowing from the first power module or the second power module to the open-winding motor needs to be turned on.

It can be understood that based on the topology shown in fig. 1, the energy storage module has three operating states, including a double-end power supply state, an energy storage module independent power supply state, and a power supply independent power supply state, where:

correspondingly, in the state, the controller respectively sends PWM pulse signals to the six switching tubes of the first power module to switch on the switching tube of the upper half-bridge of the second power module or switch on the switching tube of the lower half-bridge of the second power module, namely, the first power module is in a normal modulation state, and the second power module is in a half-bridge modulation state.

Correspondingly, in the state, the controller respectively sends PWM pulse signals to six switching tubes of the first power module and the second power module, namely, the first power module and the second power module are both in a normal modulation state.

Correspondingly, under the state, the controller respectively sends PWM pulse signals to the six switching tubes of the second power module to switch on the switching tubes of the upper half bridge or the lower half bridge of the first power module, namely, the first power module is in a half-bridge modulation state, and the second power module is in a normal modulation state.

It will be appreciated that the energy storage module can be switched between the three states described above, with reference to fig. 8, in particular:

the drive control circuit has a transition state I when the power supply independent power supply state is switched to the double-end power supply state, the second power module is switched to the normal modulation state from the half-bridge modulation state at the time of t1, and the state switching of the second power module is completed at the time of t 2; when the driving control circuit is switched from the double-end power supply state to the power supply independent power supply state, the switching action of the second power module is opposite, the transition principle is similar, and the description is omitted here.

The drive control circuit is switched from a double-end power supply state to an energy storage module independent power supply state, a transition state II is formed, the first power module is switched from a normal modulation state to a half-bridge modulation state at the moment t3, and the state switching of the first power module is completed at the moment t 2; when the driving control circuit is switched from the independent power supply state of the energy storage module to the double-end power supply state, the switching action of the first power module is opposite, the transition principle is similar, and the description is omitted here.

The driving control circuit has a transition state three when the energy storage module independently supplies power and the power supply independently supplies power, the second power module is switched from a normal modulation state to a half-bridge modulation state at the moment t5, and the state switching of the second power module is completed at the moment t 6; when the driving control circuit is switched from the independent power supply state of the energy storage module to the double-end power supply state, the switching action of the first power module is opposite, the transition principle is similar, and the description is omitted here.

The transition state is added in the process of switching the working state of the energy storage module, so that the working state of the drive control circuit is switched more stably, and the working stability of the drive control circuit is improved. The following practical example illustrates the operation state switching scenario of the driving control circuit provided in the embodiment of the present invention:

scene one: when the drive control circuit is in the power supply independent power supply state, the power supply is powered off, and at the moment, the energy storage module can be switched to the energy storage module independent power supply state from the power supply independent power supply state;

scene two: when the drive control circuit is in the independent power supply state of the power supply, the power supply is powered off, the energy storage module can be switched to the double-end power supply state from the independent power supply state of the power supply, and when the voltage of the capacitor device C is reduced to a preset value, the drive control circuit is switched to the independent power supply state of the energy storage module from the double-end power supply state;

scene three: when the drive control circuit is in a double-end power supply state, the power supply is powered off, and the energy storage module can be switched to an independent power supply state from the double-end power supply state.

Scene four: when the driving control circuit is in the independent power supply state of the energy storage module, the voltage is reduced to a preset value, and the energy storage module can be switched to a double-end power supply state from the independent power supply state of the energy storage module.

It is understood that the above scenarios are only schematic illustrations, and the embodiments of the present invention do not exhaust the descriptions of the switching scenarios.

It can be understood that the time ratio of the double-end power supply state, the energy storage module independent power supply state and the power supply independent power supply state can be controlled according to the load quantity parameter of the open winding motor. The time ratio of the double-end power supply state, the energy storage module independent power supply state and the power supply independent power supply state is controlled according to the load quantity parameter of the open winding motor, so that the power failure phenomenon of the power supply can be prevented, and the running reliability of the open winding motor is improved. The load parameter may be a required rotation speed of the open-winding motor, a required power of the air conditioner, a required frequency of the air conditioner, and the like.

The load parameter is taken as the required rotating speed of the open winding motor for illustration, when the required rotating speed of the open winding motor is higher, the time occupation ratio of the drive control circuit in the double-end power supply state can be improved, and the time occupation ratio of the drive control circuit in the energy storage module independent power supply state and the power supply independent power supply state is correspondingly shortened; when the required rotating speed of the open-winding motor is low, if the electric quantity of the energy storage module is sufficient, the time occupation ratio of the drive control circuit in the independent power supply state of the energy storage module can be improved, and the time occupation ratio of the drive control circuit in the double-end power supply state and the independent power supply state of the power supply is correspondingly shortened. It can be understood that the time ratio of the double-end power supply state, the energy storage module independent power supply state and the power supply independent power supply state is controlled on the basis that the open-winding motor keeps certain energy consumption.

It can be understood that the electricity price can also be used as an adjusting reference of the time duty ratio of the three working states of the energy storage device, if the electricity price is used as the adjusting reference of the time duty ratio, the time duty ratio of the drive control circuit in the independent power supply state of the energy storage module can be improved under the condition of higher electricity price, and the time duty ratio of the drive control circuit in the double-end power supply state and the independent power supply state of the power supply is correspondingly shortened; under the condition of lower electricity price, the time ratio of the drive control circuit in the double-end power supply state can be improved, and the time ratio of the drive control circuit in the energy storage module independent power supply state and the power supply independent power supply state is correspondingly shortened.

It can be understood that, in the drive control circuit provided in the embodiment of the present invention, the power supply may directly charge the energy storage module, and the open-winding motor may also charge the energy storage module when the open-winding motor stops, operates, and brakes, specifically:

when the open-winding motor stops providing torque (for example, stops rotating), the positive current phase and the negative current phase are selected, the controller can calculate the switching states of the switching tubes of the first power module and the second power module according to at least one of the voltage at the two ends of the capacitor device C, the voltage between the positive bus and the negative bus of the energy storage module and the three-phase current, and then the controller controls the working states of the first power module and the second power module, so that the driving control circuit is in a charging state or a discharging state. When the positive current phase is selected as an X phase and the negative current phase is selected as a Y phase, the switching tube of the half bridge on the X phase of the first power module performs switching action, the switching device of the half bridge under the Y phase of the first power module is switched off, other bridge arms of the first power module are switched off, the diode of the half bridge on the X phase of the second power module flows in the direction, the diode of the half bridge under the Y phase of the second power module flows in the direction, and other bridge arms of the second power module are switched off; when the energy storage module needs to be charged, according to the preset charging current of the energy storage module, the duty ratio or the current upper and lower limit value of the switching tube of the half bridge on the X phase is obtained through the operation of a controller, and the control signal of the switching tube of the half bridge on the X phase is determined; wherein, the X phase can be any one phase of UVW, and the Y phase can be any one phase of the other two phases of UVW after the X phase is removed. Referring to fig. 9, for example, when the positive current phase is a U-phase and the negative current phase is a W-phase, the switching tube of the half-bridge above the U-phase of the first power module performs a switching operation, the switching tube of the half-bridge below the W-phase of the first power module is turned off, the other bridge arms of the first power module are turned off, the upper half-bridge above the U-phase of the second power module is turned on, the lower half-bridge below the W-phase of the second power module is turned on, and the other bridge arms of the second power module are turned off.

When the open-winding motor runs, the controller can calculate the switching states of the switching tubes of the first power module and the second power module according to at least one of load parameters, voltages at two ends of the capacitor device C, voltages between a positive busbar and a negative busbar of the energy storage module, three-phase currents and required average charging currents, and further control the working states of the first power module and the second power module, so that the driving control circuit is in a charging state or a discharging state.

When the open-winding motor brakes, the controller can calculate the switching states of the switching tubes of the first power module and the second power module according to at least one of load parameters, voltages at two ends of the capacitor device C, voltages between a positive bus and a negative bus of the energy storage module, three-phase currents and required average charging currents, and further control the working states of the first power module and the second power module, so that the driving control circuit is in a charging state or a discharging state.

The operation of the drive control circuit provided by the embodiment of the present invention shown in fig. 1 will be described in detail below.

Through connecting first power module and second power module at open winding motor both ends, second power module is connected with energy storage module, and energy storage module is connected with second input 1600 and power connection end 1700 respectively, therefore, the electric current of following the input of power both can be to the power supply of open winding motor, also can directly charge for energy storage module, thereby reduce the control loss, and, can control drive control circuit's operating condition through controlling first power module and second power module, make the electric energy can two-way flow when the motor moves, energy storage module can be to the power supply of open winding motor under the abundant condition of energy, improve the operating voltage of motor, promote the operating efficiency of motor.

It is understood that the controller may be utilized to send control signals to the first power module and the second power module to change the operating state of the driving control circuit according to the amount of power of the energy storage module. When the electric quantity of the energy storage module is greater than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, PWM pulse signals can be sent to six switching tubes of the second power module respectively at the moment, the switching tube of an upper half-bridge of the first power module is conducted or the switching tube of a lower half-bridge of the first power module is conducted, and the energy storage module supplies power to the open-winding motor independently; or, the PWM pulse signals may be sent to six switching tubes of the first power module and the second power module, respectively, and the energy storage module and the power supply power to the open-winding motor together.

The electric quantity of the energy storage module can be obtained through parameters such as voltage and current of the energy storage module, or the voltage of the energy storage module is directly used as the electric quantity, and accordingly, the electric quantity threshold can be a voltage threshold.

And when the electric quantity of the energy storage module is smaller than or equal to the preset electric quantity threshold value, the electric quantity of the energy storage module is insufficient, at the moment, PWM pulse signals can be respectively sent to the six switching tubes of the first power module, the switching tubes of the upper half bridge of the second power module or the switching tubes of the lower half bridge of the second power module are switched on, the power is only supplied to the open winding motor by the power supply, and at the moment, because the energy storage module is directly connected with the power supply, the power supply can also charge the energy storage module.

It can be understood that, from the perspective of electricity cost, when the electricity price is less than or equal to the preset electricity price threshold, the PWM pulse signals are respectively sent to the six switching tubes of the first power module and the second power module, the driving control circuit is in a double-end power supply state, and the open-winding motor operates in open-winding connection; when the electricity price is greater than the preset electricity price threshold value, the working state of the driving control circuit can be controlled according to the electric quantity condition of the energy storage module, when the electric quantity of the energy storage module is sufficient, PWM pulse signals are respectively sent to the six switching tubes of the second power module, the switching tube of the upper half bridge of the first power module is conducted or the switching tube of the lower half bridge of the first power module is conducted, the driving control circuit is in the independent power supply state of the energy storage module at the moment, the energy storage module is used for supplying power to the open-winding motor, and the open-winding motor runs in star connection to reduce the energy consumption of the power side.

Referring to fig. 10, an embodiment of the present invention further provides a driving control circuit for driving an open-winding motor having three-phase windings, one end of each phase winding forms a first three-phase outgoing line group 1100, the other end of each phase winding forms a second three-phase outgoing line group 1200, the driving control circuit includes a first power module, a second power module, and a power connection terminal 1700, the power supply comprises a switch module, an energy storage module and a controller, wherein the first power module comprises a first input end 1300 and a first output end 1400, the first output end 1400 is connected with a first three-phase outgoing line group 1100, the second power module comprises a second input end 1600 and a second output end 1500, the second output end 1500 is connected with a second three-phase outgoing line group 1200, a power connection end 1700 is used for connecting a power supply, a power connection end 1700 is connected with the first input end 1300, the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, and the switch module is connected with the controller.

The switch module comprises a first switch, the energy storage module and the first input terminal 1300 are connected to the power connection terminal 1700 through the common terminal 1800, and the first switch is respectively connected to the first input terminal 1300 and the common terminal 1800.

It will be appreciated that, with reference to fig. 11, the first switch includes a first switching device K1, the power connection 1700 includes a positive bus connection terminal and a negative bus connection terminal, the first input 1300 includes a positive bus input terminal and a negative bus input terminal, the first switching device K1 is connected between the positive bus connection terminal and the positive bus input terminal, and the negative bus connection terminal is connected to the negative bus input terminal, and it will be appreciated that, with reference to fig. 12, the first switching device K1 may also be connected to the negative bus connection terminal and the negative bus input terminal, and the positive bus connection terminal is connected to the positive bus input terminal.

Alternatively, referring to fig. 13, the first switch includes a first switching device K1 and a second switching device K2, the power connection 1700 includes a positive bus connection terminal and a negative bus connection terminal, the first input 1300 includes a positive bus input terminal and a negative bus input terminal, the first switching device K1 is connected between the positive bus connection terminal and the positive bus input terminal, and the second switching device K2 is connected between the negative bus connection terminal and the negative bus input terminal.

Therefore, the switch module can be a single-pole single-throw switch or a double-pole double-throw switch, and has the advantages of simple structure and low cost.

It can be understood that the power connection terminal 1700 is connected to a power supply, the first input terminal 1300 and the second input terminal 1600 are both provided with a positive bus input terminal and a ground terminal, the first output terminal 1400 and the second output terminal 1500 are both three-phase output terminals, the positive bus and the negative bus of the power supply are correspondingly connected to the positive bus input terminal and the ground terminal of the first input terminal 1300, the positive bus and the ground terminal of the energy storage module are correspondingly connected to the positive bus input terminal and the ground terminal of the second input terminal 1600, the three-phase output terminal of the first output terminal 1400 is correspondingly connected to the first three-phase outgoing line group 1100 of the open-winding motor, and the three-phase output terminal of the second output terminal 1500 is correspondingly connected to the second three-phase outgoing line group 1200 of the open-winding motor.

Similarly, referring to fig. 10, the power supply may be an ac power supply + an ac-dc converter, and two output terminals of the ac-dc converter are correspondingly connected to the power connection terminal 1700, wherein a positive bus and a negative bus of the ac power supply are correspondingly connected to two input terminals of the ac-dc converter, in this case, the charging loop of the energy storage module and the power supply loop of the open-winding motor form a connection of a common dc bus, which is beneficial to improving the safety of the circuit. In addition, referring to fig. 14, the number of the ac/dc converters may also be two, the power input end is disposed between the ac power supply and the ac/dc converter, and correspondingly, the common end 1800 between the energy storage device and the first input end 1300 is also disposed between the ac power supply and the ac/dc converter, the power connection end 1700 is connected to the first input end 1300 through one of the ac/dc converters, and the power connection end 1700 is connected to the energy storage module through the other ac/dc converter.

Similarly, the first power module and the second power module each include three bridge arms connected in parallel with each other, each bridge arm includes two switching tubes connected in series with each other, where the switching tubes may be MOSFETs (Metal-Oxide-Semiconductor Field-Effect transistors) or IGBTs (Insulated Gate Bipolar transistors).

Similarly, the driving control circuit may further include a capacitor device C, the capacitor device C is connected in parallel between the power connection terminal 1700 and the first power module, and by providing the capacitor device C, the electric energy of the power supply may be stored, and the signal of the power connection terminal 1700 may be filtered, so that the operation of the open-winding motor is more stable.

Similarly, the energy storage module may be any one of a battery, a capacitor, a battery + a capacitor, a capacitor + a bridge arm + an inductor + a battery.

It will be appreciated that based on the power supply configuration shown in fig. 10 or 14, the first switch is a dc switch.

The operation principle of the drive control circuit provided by the embodiment of the present invention shown in fig. 10 is described in detail below.

Similarly, based on the circuit topology shown in fig. 10, the controller may also send a control signal to the first power module and the second power module according to the electric quantity of the energy storage module to change the operating state of the driving control circuit, specifically, when the electric quantity of the energy storage module is greater than a preset electric quantity threshold, control the on/off of the first switch according to a load parameter of the open-winding motor, and send a control signal to the first power module and the second power module to change the operating state of the driving control circuit. When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the on-off of the first switch can be controlled according to the load quantity parameter of the open winding motor, and a control signal is sent to the first power module and the second power module to change the working state of the driving control circuit, so that whether the energy storage module and the power supply power to the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameter of the open winding motor.

Specifically, the load parameter may be a required rotation speed of the open-winding motor, when the required rotation speed of the open-winding motor is less than or equal to a preset rotation speed threshold, it indicates that the load demand is low, at this time, the first switch may be turned off, PWM pulse signals are respectively sent to six switching tubes of the second power module, a switching tube of an upper half-bridge of the first power module is turned on or a switching tube of a lower half-bridge of the first power module is turned on, at this time, the energy storage module alone supplies power to the open-winding motor, and the open-winding motor operates in a star connection; when the required rotating speed of the open winding motor is greater than a preset rotating speed threshold value, the load requirement is high, the first switch can be closed at the moment, PWM pulse signals are respectively sent to six switching tubes of the first power module and the second power module, the energy storage module and the power supply power to the open winding motor at the moment, and the open winding motor works in open winding connection.

And when the electric quantity of the energy storage module is smaller than or equal to the electric quantity threshold value, the electric quantity of the energy storage module is insufficient, the first switch can be closed at the moment, the PWM pulse signals are respectively sent to the six switching tubes of the first power module, the switching tube of the upper half-bridge of the second power module is switched on or the switching tube of the lower half-bridge of the second power module is switched on, the power supply independently supplies power to the open-winding motor, the power supply simultaneously charges the energy storage module, and the open-winding motor works in star connection.

It can be understood that, on the basis of the circuit topology shown in fig. 10, from the viewpoint of electricity cost, when the electricity price is less than or equal to the preset electricity price threshold, the first switch is closed, the PWM pulse signals are respectively sent to the six switching tubes of the first power module and the second power module, the driving control circuit is in a double-end power supply state, and the open-winding motor operates in open-winding connection; when the electricity price is greater than the preset electricity price threshold value, the working state of the driving control circuit can be controlled according to the electric quantity condition of the energy storage module, when the electric quantity of the energy storage module is sufficient, the first switch is disconnected, the driving control circuit is in the independent power supply state of the energy storage module, the energy storage module is utilized to supply power to the open winding motor, and the open winding motor operates in star connection to reduce the energy consumption of the power supply side.

It should be added that the operation principle of the circuit topology of fig. 14 is similar to that of fig. 10, and is not described again here.

Referring to fig. 15, an embodiment of the present invention further provides a driving control circuit for driving an open-winding motor having three-phase windings, one end of each phase winding forms a first three-phase outgoing line group 1100, the other end of each phase winding forms a second three-phase outgoing line group 1200, the driving control circuit includes a first power module, a second power module, a power connection terminal 1700, the power supply comprises a switch module, an energy storage module and a controller, wherein the first power module comprises a first input end 1300 and a first output end 1400, the first output end 1400 is connected with a first three-phase outgoing line group 1100, the second power module comprises a second input end 1600 and a second output end 1500, the second output end 1500 is connected with a second three-phase outgoing line group 1200, a power connection end 1700 is used for connecting a power supply, a power connection end 1700 is connected with the first input end 1300, the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, and the switch module is connected with the controller.

The switch module comprises a first switch, the energy storage module and the first input terminal 1300 are connected with the power connection terminal 1700 through the common terminal 1800, and the first switch is respectively connected with the energy storage module and the common terminal 1800.

The specific structure of the first switch has already been described above, and is not described herein again.

Similarly, referring to fig. 15, the power source may be an ac power source + an ac-dc converter, and two output terminals of the ac-dc converter are correspondingly connected to the power connection terminal 1700, wherein a positive bus and a negative bus of the ac power source are correspondingly connected to two input terminals of the ac-dc converter, in this case, the charging loop of the energy storage module and the power supply loop of the open-winding motor form a connection with a common dc bus, which is beneficial to improve the safety of the circuit. In addition, referring to fig. 16, the number of the ac/dc converters may also be two, the power input end is disposed between the ac power supply and the ac/dc converter, and correspondingly, the common end 1800 between the energy storage device and the first input end 1300 is also disposed between the ac power supply and the ac/dc converter, the power connection end 1700 is connected to the first input end 1300 through one of the ac/dc converters, and the power connection end 1700 is connected to the energy storage module through the other ac/dc converter.

Similarly, the first power module and the second power module each include three bridge arms connected in parallel, each bridge arm includes two switching tubes connected in series, where the switching tubes may be MOSFETs (Metal-Oxide-Semiconductor Field-Effect transistors) or IGBTs (Insulated Gate Bipolar transistors).

Similarly, the driving control circuit may further include a capacitor device C, the capacitor device C is connected in parallel between the power connection end 1700 and the first power module, and by providing the capacitor device C, the electric energy of the power supply may be stored, and the signal of the power connection end 1700 may be filtered, so that the operation of the open-winding motor is more stable.

Similarly, the energy storage module can be any one of a battery, a capacitor, a battery + a capacitor, a capacitor + a bridge arm + an inductor + a battery.

It will be appreciated that based on the power supply configuration shown in fig. 15, the first switch is a dc switch. Based on the power supply configuration shown in fig. 16, the first switch is an ac switch.

The operation principle of the drive control circuit provided by the embodiment of the present invention shown in fig. 15 is described in detail below.

Similarly, based on the circuit topology shown in fig. 15, the controller may also send a control signal to the first power module and the second power module according to the electric quantity of the energy storage module to change the operating state of the driving control circuit, specifically, when the electric quantity of the energy storage module is greater than a preset electric quantity threshold, turn off the first switch, and send a control signal to the first power module and the second power module according to the load quantity parameter of the open-winding motor to change the operating state of the driving control circuit. When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be disconnected at the moment, the power supply does not need to charge the energy storage module, and then control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply power to the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameters of the open winding motor.

Specifically, the load parameter may be a required rotation speed of the open-winding motor, when the required rotation speed of the open-winding motor is less than or equal to a preset rotation speed threshold, it indicates that the load demand is low, at this time, PWM pulse signals may be respectively sent to six switching tubes of the second power module, a switching tube of an upper half-bridge of the first power module is turned on, or a switching tube of a lower half-bridge of the first power module is turned on, at this time, the energy storage module alone supplies power to the open-winding motor, and the open-winding motor operates in a star connection; when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, the load requirement is high, PWM pulse signals can be respectively sent to six switching tubes of the first power module and the second power module, the energy storage module and the power supply power to the open-winding motor at the moment, and the open-winding motor works in open-winding connection.

It can be understood that, on the basis of the circuit topology shown in fig. 15, from the viewpoint of electricity cost, when the electricity price is less than or equal to the preset electricity price threshold, the first switch is closed, the PWM pulse signals are respectively sent to the six switching tubes of the first power module and the second power module, the driving control circuit is in a double-end power supply state, and the open-winding motor operates in open-winding connection; when the electricity price is greater than the preset electricity price threshold value, the working state of the drive control circuit can be controlled according to the electric quantity condition of the energy storage module, when the electric quantity of the energy storage module is sufficient, the first switch is disconnected, the drive control circuit is in the independent power supply state of the energy storage module, the energy storage module is utilized to supply power to the open winding motor, and the open winding motor operates in star connection to reduce the energy consumption of the power supply side.

It should be added that the operation principle of the circuit topology of fig. 16 is similar to that of fig. 15, and is not described again here.

Referring to fig. 17, an embodiment of the present invention further provides a driving control circuit for driving an open-winding motor having three-phase windings, wherein one end of each phase winding forms a first three-phase outgoing line group 1100, and the other end of each phase winding forms a second three-phase outgoing line group 1200, the driving control circuit includes a first power module, a second power module, and a power connection terminal 1700, the power supply comprises a switch module, an energy storage module and a controller, wherein the first power module comprises a first input end 1300 and a first output end 1400, the first output end 1400 is connected with a first three-phase outgoing line group 1100, the second power module comprises a second input end 1600 and a second output end 1500, the second output end 1500 is connected with a second three-phase outgoing line group 1200, a power connection end 1700 is used for connecting a power supply, a power connection end 1700 is connected with the first input end 1300, the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, and the switch module is connected with the controller.

The switch module includes a first switch, and the first switch is connected between the second input end 1600 and the energy storage module. The specific structure of the first switch has already been described above, and is not described herein again.

Similarly, referring to fig. 17, the power source may be an ac power source + an ac-dc converter, and two output terminals of the ac-dc converter are correspondingly connected to the power connection terminal 1700, wherein a positive bus and a negative bus of the ac power source are correspondingly connected to two input terminals of the ac-dc converter, in this case, the charging loop of the energy storage module and the power supply loop of the open-winding motor form a connection of a common dc bus, which is beneficial to improve the safety of the circuit. In addition, referring to fig. 18, the number of the ac/dc converters may also be two, the power input end is disposed between the ac power supply and the ac/dc converter, and correspondingly, the common end 1800 between the energy storage device and the first input end 1300 is also disposed between the ac power supply and the ac/dc converter, the power connection end 1700 is connected to the first input end 1300 through one of the ac/dc converters, and the power connection end 1700 is connected to the energy storage module through the other ac/dc converter.

It will be appreciated that based on the power supply configuration shown in fig. 17 or fig. 18, the first switch is a dc switch.

The operation principle of the drive control circuit provided by the embodiment of the present invention shown in fig. 17 is described in detail below.

Similarly, based on the circuit topology shown in fig. 17, the controller may also send a control signal to the first power module and the second power module according to the electric quantity of the energy storage module to change the operating state of the driving control circuit, specifically, when the electric quantity of the energy storage module is greater than a preset electric quantity threshold, the first switch is closed, and a control signal is sent to the first power module and the second power module according to the load quantity parameter of the open-winding motor to change the operating state of the driving control circuit. When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be closed, and then control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameters of the open winding motor.

Specifically, when the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, which indicates that the load requirement is low, PWM pulse signals can be respectively sent to the six switching tubes of the second power module at this time, the switching tube of the upper half-bridge of the first power module is turned on or the switching tube of the lower half-bridge of the first power module is turned on, the energy storage module alone supplies power to the open-winding motor at this time, and the open-winding motor works in star connection; when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, the load requirement is high, PWM pulse signals can be respectively sent to six switching tubes of the first power module and the second power module, the energy storage module and the power supply power to the open-winding motor at the moment, and the open-winding motor works in open-winding connection.

And when the electric quantity of the energy storage module is smaller than or equal to the electric quantity threshold value, the electric quantity of the energy storage module is insufficient, the first switch can be switched off at the moment, PWM pulse signals are respectively sent to the six switching tubes of the first power module, the switching tube of the upper half-bridge of the second power module is switched on or the switching tube of the lower half-bridge of the second power module is switched on, the power supply independently supplies power to the open-winding motor, the power supply simultaneously charges the energy storage module, and the open-winding motor works in star connection. And because the first switch is disconnected, the energy storage module is completely isolated from the open winding motor in the charging process, and the control loss is favorably reduced.

It can be understood that, on the basis of the circuit topology shown in fig. 17, from the viewpoint of electricity cost, when the electricity price is less than or equal to the preset electricity price threshold, the first switch is closed, the PWM pulse signals are respectively sent to the six switching tubes of the first power module and the second power module, the driving control circuit is in a double-end power supply state, and the open-winding motor operates in open-winding connection; when the electricity price is greater than the preset electricity price threshold value, the working state of the driving control circuit can be controlled according to the electric quantity condition of the energy storage module, when the electric quantity of the energy storage module is sufficient, the first switch is disconnected, the driving control circuit is in the independent power supply state of the energy storage module, the energy storage module is utilized to supply power to the open winding motor, and the open winding motor operates in star connection to reduce the energy consumption of the power supply side.

It should be added that the operation principle of the circuit topology of fig. 18 is similar to that of fig. 17, and is not described herein again.

Referring to fig. 19, an embodiment of the present invention further provides a driving control circuit for driving an open-winding motor having three-phase windings, one end of each phase winding forms a first three-phase outgoing line group 1100, the other end of each phase winding forms a second three-phase outgoing line group 1200, the driving control circuit includes a first power module, a second power module, a power connection terminal 1700, the power supply comprises a switch module, an energy storage module and a controller, wherein the first power module comprises a first input end 1300 and a first output end 1400, the first output end 1400 is connected with a first three-phase outgoing line group 1100, the second power module comprises a second input end 1600 and a second output end 1500, the second output end 1500 is connected with a second three-phase outgoing line group 1200, a power connection end 1700 is used for connecting a power supply, a power connection end 1700 is connected with the first input end 1300, the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, and the switch module is connected with the controller.

The switch module comprises a first switch, the energy storage module and the first input terminal 1300 are connected with the power connection terminal 1700 through the common terminal 1800, and the first switch is respectively connected with the power connection terminal 1700 and the common terminal 1800;

it is understood that, referring to fig. 21 or fig. 22, the switch module may also include a first switch and a second switch, the first switch connects the first input terminal 1300 and the common terminal 1800, respectively, and the second switch connects the energy storage module and the common terminal 1800, respectively.

The first switch and the second switch are similar in structure and have already been described above, and are not described again here.

Similarly, referring to fig. 20 or fig. 21, the power supply may be an ac power supply + an ac-dc converter, and two output terminals of the ac-dc converter are correspondingly connected to the power connection terminal 1700, wherein a positive bus and a negative bus of the ac power supply are correspondingly connected to two input terminals of the ac-dc converter, in this case, the charging circuit of the energy storage module and the power supply circuit of the open-winding motor form a connection of a common dc bus, which is beneficial to improve the safety of the circuit. In addition, referring to fig. 19 or fig. 22, the number of the ac/dc converters may also be two, the power input end is disposed between the ac power supply and the ac/dc converter, correspondingly, the common end 1800 between the energy storage device and the first input end 1300 is also disposed between the ac power supply and the ac/dc converter, the power connection end 1700 is connected to the first input end 1300 through one of the ac/dc converters, and the power connection end 1700 is connected to the energy storage module through the other ac/dc converter.

It will be appreciated that based on the power supply configuration shown in fig. 19, the first switch is an ac switch. Based on the power supply configuration shown in fig. 20, 21, or 22, the first switch and the second switch are dc switches.

The operation principle of the drive control circuit provided by the embodiment of the present invention shown in fig. 19 is described in detail below.

Similarly, based on the circuit topology shown in fig. 19, the controller may also send a control signal to the first power module and the second power module according to the electric quantity of the energy storage module to change the operating state of the driving control circuit, specifically, when the electric quantity of the energy storage module is greater than a preset electric quantity threshold, which indicates that the electric quantity of the energy storage module is sufficient, the switching module may be turned off, the PWM pulse signals are sent to the six switching tubes of the second power module, respectively, the switching tube of the upper half-bridge of the first power module is turned on or the switching tube of the lower half-bridge of the first power module is turned on, at this time, the energy storage module alone supplies power to the open-winding motor, the open-winding motor operates in a star connection, and the open-winding motor is completely isolated from the power supply after the switching module is turned off, which is beneficial to reducing the control loss; when the electric quantity of the energy storage module is smaller than or equal to the preset electric quantity threshold value, the electric quantity of the energy storage module is insufficient, the switch module can be closed at the moment, the PWM pulse signals are respectively sent to the six switch tubes of the first power module, the switch tubes of the upper half bridge of the second power module or the switch tubes of the lower half bridge of the second power module are switched on, the power supply independently supplies power to the open-winding motor, the power supply simultaneously charges the energy storage module, and the open-winding motor works in star connection.

It can be understood that, on the basis of the circuit topology shown in fig. 19, from the perspective of electricity cost, when the electricity price is less than or equal to the preset electricity price threshold, the switch module is closed, PWM pulse signals are respectively sent to the six switch tubes of the first power module and the second power module, the driving control circuit is in a double-end power supply state, and the open-winding motor operates in open-winding connection; when the electricity price is greater than the preset electricity price threshold value, the working state of the drive control circuit can be controlled according to the electric quantity condition of the energy storage module, when the electric quantity of the energy storage module is sufficient, the switch module is disconnected, the drive control circuit is in the independent power supply state of the energy storage module, the energy storage module is used for supplying power to the open-winding motor, and the open-winding motor runs in star connection to reduce the energy consumption of the power supply side.

It should be added that the operation principle of the circuit topology of fig. 20, 21 and 22 is similar to that of fig. 19, and is not repeated herein.

It will be appreciated that based on the circuit topology shown in fig. 21 or fig. 22, opening the switch module, i.e. opening the first switch and the second switch simultaneously, and closing the switch module, i.e. closing the first switch and the second switch simultaneously.

Referring to fig. 23, an embodiment of the present invention further provides a driving control method applied to the driving control circuit shown in fig. 1, where the driving control method includes, but is not limited to, the following steps 2301 to 2302:

step 2301: acquiring the electric quantity of the energy storage module;

in step 2301, the magnitude of the electric quantity of the energy storage module indicates the electric quantity condition of the energy storage module, and the larger the electric quantity of the energy storage module is, the more sufficient the electric quantity of the energy storage module is, wherein the obtaining of the electric quantity of the energy storage module can be realized by the sampling circuit.

Step 2302: and sending a control signal to the first power module and the second power module according to the electric quantity of the energy storage module so as to change the working state of the driving control circuit.

The energy storage module has three working states including a double-end power supply state, an energy storage module independent power supply state and a power supply independent power supply state, wherein the power supply supplies power to the open winding motor only by the power supply in the power supply independent power supply state, the double-end power supply state power supply and the energy storage module simultaneously supply power to the open winding motor, and the energy storage module supplies power to the open winding motor only by the energy storage module in the energy storage module independent power supply state.

In the above steps 2301 to 2302, by acquiring the electric quantity of the energy storage module, the controller sends a control signal to the first power module and the second power module according to the electric quantity of the energy storage module to change the working state of the driving control circuit, so that the electric energy can flow in two directions when the motor operates, and the energy storage module can supply power to the open-winding motor under the condition of sufficient energy, thereby improving the operating voltage of the motor and improving the operating efficiency of the motor.

It is understood that the sending of the control signal to the first power module and the second power module to change the operating state of the driving control circuit according to the amount of power includes one of:

when the electric quantity is greater than a preset electric quantity threshold value, PWM pulse signals are respectively sent to six switching tubes of the second power module, and switching-on of a switching tube of an upper half-bridge of the first power module or switching-on of a switching tube of a lower half-bridge of the first power module is conducted;

and when the electric quantity is greater than a preset electric quantity threshold value, respectively sending PWM pulse signals to six switching tubes of the first power module and the second power module.

When the electric quantity of the energy storage module is greater than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, at the moment, PWM pulse signals can be respectively sent to the six switching tubes of the second power module, the switching tube of the upper half-bridge of the first power module is conducted or the switching tube of the lower half-bridge of the first power module is conducted, and the energy storage module independently supplies power to the open-winding motor; or, the PWM pulse signals may be sent to six switching tubes of the first power module and the second power module, respectively, and the energy storage module and the power supply power to the open-winding motor together.

It can be understood that, in the step 2302, sending a control signal to the first power module and the second power module according to the electric quantity to change the operating state of the driving control circuit, further includes:

when the electric quantity is smaller than or equal to the electric quantity threshold value, PWM pulse signals are respectively sent to the six switching tubes of the first power module, and the switching tube of the upper half-bridge of the second power module is conducted or the switching tube of the lower half-bridge of the second power module is conducted.

Wherein, when the electric quantity of energy storage module is less than or equal to predetermined electric quantity threshold value, it is not enough to show the energy storage module electric quantity, can send PWM pulse signal respectively to six switch tubes of first power module this moment, switches on the switch tube of the last half-bridge of second power module or switches on the switch tube of the lower half-bridge of second power module, only by the power to the open winding motor power supply, because energy storage module and power lug connection, the power also can charge to energy storage module this moment.

It is understood that, based on the circuit topology shown in fig. 10 or fig. 14, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may also include:

When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the on-off state of the first switch can be controlled according to the load quantity parameter of the open winding motor, and the control signal is sent to the first power module and the second power module to change the working state of the driving control circuit, so that the energy storage module and the power supply can supply power to the open winding motor together or the energy storage module supplies power independently according to the load quantity parameter of the open winding motor.

It can be understood that, the on/off of the first switch is controlled according to the load parameter of the open winding motor, and the control signal is sent to the first power module and the second power module to change the working state of the driving control circuit, which includes at least one of the following:

when the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, the first switch is disconnected, PWM pulse signals are respectively sent to six switching tubes of the second power module, and a switching tube of an upper half-bridge of the first power module is conducted or a switching tube of a lower half-bridge of the first power module is conducted;

and when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, closing the first switch, and respectively sending PWM pulse signals to six switching tubes of the first power module and the second power module.

When the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, the load requirement is low, the first switch can be disconnected at the moment, PWM pulse signals are respectively sent to six switching tubes of the second power module, the switching tube of an upper half-bridge of the first power module is conducted or the switching tube of a lower half-bridge of the first power module is conducted, the energy storage module independently supplies power to the open-winding motor at the moment, and the open-winding motor works in star connection; when the required rotating speed of the open winding motor is greater than a preset rotating speed threshold value, the load requirement is high, the first switch can be closed at the moment, PWM pulse signals are respectively sent to six switching tubes of the first power module and the second power module, the energy storage module and the power supply power to the open winding motor at the moment, and the open winding motor works in open winding connection.

It is to be understood that, based on the circuit topology shown in fig. 10, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may further include:

and when the electric quantity is less than or equal to the electric quantity threshold value, closing the first switch, respectively sending PWM pulse signals to the six switching tubes of the first power module, and switching on the switching tube of the upper half-bridge of the second power module or switching on the switching tube of the lower half-bridge of the second power module.

Wherein, when the electric quantity of energy storage module is less than or equal to the electric quantity threshold value, indicate that the energy storage module electric quantity is not enough, can close first switch this moment, send PWM pulse signal respectively to six switch tubes of first power module, switch on the switch tube of the last half-bridge of second power module or switch on the switch tube of the lower half-bridge of second power module, by the power supply to the open winding motor power supply alone to the power charges for energy storage module simultaneously, and the open winding motor work is in the star connection.

It is to be understood that, based on the circuit topology shown in fig. 15, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may also include:

and when the electric quantity is greater than a preset electric quantity threshold value, the first switch is switched off, and control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the driving control circuit.

When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be disconnected at the moment, the power supply does not need to charge the energy storage module, and then control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply power to the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameters of the open winding motor.

It can be understood that the sending of the control signal to the first power module and the second power module to change the operating state of the driving control circuit according to the load quantity parameter of the open-winding motor includes at least one of the following:

when the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, PWM pulse signals are respectively sent to six switching tubes of the second power module, and a switching tube of an upper half-bridge of the first power module is conducted or a switching tube of a lower half-bridge of the first power module is conducted;

when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, PWM pulse signals are respectively sent to six switching tubes of the first power module and the second power module.

When the required rotating speed of the open-winding motor is less than or equal to a preset rotating speed threshold value, the load requirement is low, at the moment, PWM pulse signals can be respectively sent to six switching tubes of the second power module, the switching tube of an upper half-bridge of the first power module is conducted or the switching tube of a lower half-bridge of the first power module is conducted, at the moment, the energy storage module independently supplies power to the open-winding motor, and the open-winding motor works in star connection; when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, the load requirement is high, PWM pulse signals can be respectively sent to six switching tubes of the first power module and the second power module, the energy storage module and the power supply power to the open-winding motor at the moment, and the open-winding motor works in open-winding connection.

It is to be understood that, based on the circuit topology shown in fig. 15, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may further include:

It is to be understood that, based on the circuit topology shown in fig. 17, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may also include:

When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the first switch can be closed, and then control signals are sent to the first power module and the second power module according to the load quantity parameters of the open winding motor so as to change the working state of the driving control circuit, so that whether the energy storage module and the power supply the open winding motor together or the energy storage module supplies power independently can be selected according to the load quantity parameters of the open winding motor.

It can be understood that, the switching of the first switch is controlled according to the load quantity parameter of the open-winding motor, and the control signal is sent to the first power module and the second power module to change the working state of the driving control circuit, which includes at least one of the following:

It is to be understood that, based on the circuit topology shown in fig. 17, in the step 2302, sending a control signal to the first power module and the second power module according to the power amount to change the operating state of the driving control circuit may further include:

and when the electric quantity is less than or equal to the electric quantity threshold value, the first switch is switched off, the PWM pulse signals are respectively sent to the six switching tubes of the first power module, and the switching tube of the upper half-bridge of the second power module is switched on or the switching tube of the lower half-bridge of the second power module is switched on.

Wherein, when the electric quantity of energy storage module is less than or equal to the electric quantity threshold value, indicate that the energy storage module electric quantity is not enough, can break off first switch this moment, send PWM pulse signal respectively to six switch tubes of first power module, switch on the switch tube of the last half-bridge of second power module or switch on the switch tube of the lower half-bridge of second power module, by the power supply to the open winding motor power supply alone to the power charges for energy storage module simultaneously, and the open winding motor work is in the star connection. And because the first switch is disconnected, the energy storage module is completely isolated from the open winding motor in the charging process, and the control loss is favorably reduced.

It is understood that, based on the circuit topology shown in fig. 19, in the step 2302, sending a control signal to the first power module and the second power module according to the amount of power to change the operating state of the driving control circuit also includes at least one of the following:

and when the electric quantity is greater than a preset electric quantity threshold value, the switch module is disconnected, PWM pulse signals are respectively sent to the six switch tubes of the second power module, and the switch tube of the upper half-bridge of the first power module is switched on or the switch tube of the lower half-bridge of the first power module is switched on.

When the electric quantity is smaller than or equal to a preset electric quantity threshold value, the switch module is closed, the PWM pulse signals are respectively sent to the six switch tubes of the first power module, and the switch tube of the upper half-bridge of the second power module is conducted or the switch tube of the lower half-bridge of the second power module is conducted.

When the electric quantity of the energy storage module is larger than a preset electric quantity threshold value, the electric quantity of the energy storage module is sufficient, the switch module can be disconnected at the moment, PWM pulse signals are respectively sent to six switch tubes of the second power module, the switch tube of the upper half-bridge of the first power module is switched on or the switch tube of the lower half-bridge of the first power module is switched on, the energy storage module independently supplies power to the open-winding motor, the open-winding motor works in star connection, and the open-winding motor is completely isolated from a power supply after the switch module is disconnected, so that the control loss is favorably reduced; when the electric quantity of the energy storage module is smaller than or equal to the preset electric quantity threshold value, the electric quantity of the energy storage module is insufficient, the switch module can be closed at the moment, the PWM pulse signals are respectively sent to the six switch tubes of the first power module, the switch tubes of the upper half bridge of the second power module or the switch tubes of the lower half bridge of the second power module are switched on, the power supply independently supplies power to the open-winding motor, the power supply simultaneously charges the energy storage module, and the open-winding motor works in star connection.

It can be understood that, based on the circuit topology shown in fig. 1, the operating states of the driving control circuit include a double-end power supply state, an energy storage module independent power supply state, and a power supply independent power supply state, where:

under the double-end power supply state, respectively sending PWM pulse signals to six switching tubes of a first power module and a second power module;

under the independent power supply state of the energy storage module, PWM pulse signals are respectively sent to six switching tubes of the second power module, and switching-on of an upper half-bridge switching tube of the first power module or switching-on of a lower half-bridge switching tube of the first power module is conducted;

under the independent power supply state of a power supply, PWM pulse signals are respectively sent to six switching tubes of a first power module, and switching tubes of an upper half-bridge of a second power module or switching tubes of a lower half-bridge of the second power module are conducted;

therefore, the time ratio of the double-end power supply state, the energy storage module independent power supply state and the power supply independent power supply state can be controlled according to the load quantity parameter of the open winding motor.

The time ratio of the double-end power supply state, the energy storage module independent power supply state and the power supply independent power supply state is controlled according to the load quantity parameter of the open winding motor, so that the power failure phenomenon of a power supply can be prevented, and the running reliability of the open winding motor is improved.

It can be understood that, based on the circuit topologies shown in fig. 10, fig. 15, fig. 17, and fig. 19, the principles of the double-end power supply state, the energy storage module independent power supply state, and the power supply independent power supply state are similar, and detailed descriptions have been already provided in the circuit topology embodiment, and are not repeated herein.

In addition, the embodiment of the invention also provides a circuit board, which comprises any one of the driving control circuits described in the above embodiments, therefore, the circuit board is connected with the first power module and the second power module at two ends of the open-winding motor, the second power module is connected with the energy storage module, and the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, therefore, the current input from the power supply input end can not only supply power to the open-winding motor, but also directly charge the energy storage module, thereby reducing the control loss, and controlling the operating state of the drive control circuit by controlling the first power module and the second power module, the electric energy can flow in two directions when the motor operates, the energy storage module can supply power to the open winding motor under the condition of sufficient energy, the operating voltage of the motor is improved, and the operating efficiency of the motor is improved.

In addition, an embodiment of the present invention further provides an air conditioner, including the above-mentioned circuit board, or including a memory and a processor, where the memory stores a computer program, and the processor implements the driving control method according to the second aspect when executing the computer program, so that the air conditioner connects the first power module and the second power module at two ends of the open-winding motor, the second power module is connected with an energy storage module, and the energy storage module is respectively connected with the second input end 1600 and the power connection end 1700, so that a current input from the power input end can supply power to the open-winding motor or directly charge the energy storage module, thereby reducing control loss, and the operating state of the driving control circuit can be controlled by controlling the first power module and the second power module, so that electric energy can flow in two directions when the motor operates, the energy storage module can supply power to the open winding motor under the condition of sufficient energy, so that the operating voltage of the motor is improved, and the operating efficiency of the motor is improved.

Fig. 24 illustrates an air conditioner 2400 provided in an embodiment of the present invention. The air conditioner 2400 includes: a memory 2401, a processor 2402 and a computer program stored on the memory 2401 and operable on the processor 2402, the computer program being operable to execute the above-described drive control method.

The processor 2402 and the memory 2401 may be connected by a bus or other means.

The memory 2401, as a non-transitory computer-readable storage medium, may be used to store a non-transitory software program and a non-transitory computer-executable program, such as the drive control method described in the embodiment of the present invention. The processor 2402 implements the drive control method described above by running a non-transitory software program and instructions stored in the memory 2401.

The memory 2401 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data for performing the driving control method described above. Further, the memory 2401 may include a high speed random access memory 2401, and may also include a non-transitory memory 2401, such as at least one storage device memory device, flash memory device, or other non-transitory solid state memory device. In some embodiments, the memory 2401 may optionally include a memory 2401 remotely located from the processor 2402, and the remote memory 2401 may be connected to the air conditioner 2400 over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Non-transitory software programs and instructions necessary to implement the drive control methods described above are stored in the memory 2401 and, when executed by the one or more processors 2402, perform the drive control methods described above, e.g., performing method steps 2301-2302 in fig. 23.

The embodiment of the invention also provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used for executing the drive control method.

In one embodiment, the computer-readable storage medium stores computer-executable instructions that, when executed by one or more control processors, e.g., by one of the processors 2402 of the air conditioner 2400, cause the processor 2402 to perform the drive control method described above, e.g., perform method steps 2301-2302 of fig. 23.

The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, storage device storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and various equivalent modifications or substitutions can be made without departing from the spirit of the present invention and the scope of the present invention is defined by the appended claims.

Claims

1. A drive control circuit for driving an open-winding motor having three-phase windings, one end of each of the phases of the windings constituting a first three-phase outgoing line group, and the other end of each of the phases of the windings constituting a second three-phase outgoing line group, the drive control circuit comprising:

2. The drive control circuit according to claim 1, characterized in that the drive control circuit further comprises:

3. The drive control circuit according to claim 2, characterized in that:

the switch module comprises a first switch, the energy storage module and the first input end are connected with the power supply connecting end through a common end, and the first switch is respectively connected with the first input end and the common end;

4. The drive control circuit according to claim 2, characterized in that:

the energy storage module and the first input end are connected with the power supply connecting end through a public end, wherein:

5. A drive control method is applied to a drive control circuit, the drive control circuit is used for driving an open winding motor with three-phase windings, one end of each phase of the windings forms a first three-phase wire outlet group, the other end of each phase of the windings forms a second three-phase wire outlet group, the drive control circuit comprises a first power module, a second power module, a power supply connecting end, an energy storage module and a controller, the first power module comprises a first input end and a first output end, the first output end is connected with the first three-phase wire outlet group, the second power module comprises a second input end and a second output end, the second output end is connected with the second three-phase wire outlet group, the power supply connecting end is connected with the first input end, the energy storage module is respectively connected with the second input end and the power supply connecting end, the controller is respectively connected with the first power module and the second power module;

the drive control method includes:

acquiring the electric quantity of the energy storage module;

6. The driving control method according to claim 5, wherein the first power module and the second power module each include three bridge arms connected in parallel, each bridge arm includes two switching tubes connected in series, and the sending of the control signal to the first power module and the second power module according to the electric quantity to change the operating state of the driving control circuit includes one of:

when the electric quantity is greater than a preset electric quantity threshold value, sending PWM pulse signals to the six switching tubes of the second power module respectively, and switching on the switching tube of an upper half bridge of the first power module or switching on the switching tube of a lower half bridge of the first power module;

7. The driving control method according to claim 6, wherein the sending of the control signal to the first power module and the second power module according to the electric quantity to change the operating state of the driving control circuit further comprises:

8. The driving control method according to claim 5, wherein the driving control circuit further comprises a switch module, the switch module comprises a first switch, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, and the first switch is respectively connected to the first input terminal and the common terminal;

when the electric quantity is larger than a preset electric quantity threshold value, the on-off of the first switch is controlled according to the load quantity parameter of the open winding motor, and control signals are sent to the first power module and the second power module to change the working state of the driving control circuit.

9. The driving control method according to claim 8, wherein the first power module and the second power module each include three bridge arms connected in parallel, each bridge arm includes two switching tubes connected in series, the load parameter includes a required rotation speed of the open-winding motor, the on-off of the first switch is controlled according to the load parameter of the open-winding motor, and a control signal is sent to the first power module and the second power module to change an operating state of the driving control circuit, where the control signal includes at least one of:

and when the required rotating speed of the open-winding motor is greater than a preset rotating speed threshold value, closing the first switch, and sending PWM pulse signals to the six switching tubes of the first power module and the second power module respectively.

10. The method of claim 9, wherein the sending control signals to the first power module and the second power module according to the amount of power to change the operating state of the driving control circuit further comprises:

11. The drive control method according to claim 5, wherein the drive control circuit further comprises a switch module, the switch module comprises a first switch, the energy storage module and the first input terminal are connected to the power connection terminal through a common terminal, and the first switch is respectively connected to the energy storage module and the common terminal;

12. The driving control method according to claim 11, wherein the first power module and the second power module each include three bridge arms connected in parallel, each bridge arm includes two switching tubes connected in series, the load parameter includes a required rotation speed of the open-winding motor, and the sending of the control signal to the first power module and the second power module according to the load parameter of the open-winding motor to change the operating state of the driving control circuit includes at least one of:

13. The method of claim 12, wherein the sending control signals to the first power module and the second power module according to the amount of power to change the operating state of the driving control circuit further comprises:

14. The drive control method according to claim 5, wherein the drive control circuit further comprises a switching module including a first switch connected between the second input terminal and the energy storage module;

the sending a control signal to the first power module and the second power module according to the electric quantity to change the working state of the driving control circuit includes:

15. The driving control method according to claim 14, wherein the first power module and the second power module each include three bridge arms connected in parallel, each bridge arm includes two switching tubes connected in series, the load parameter includes a required rotation speed of the open-winding motor, the on-off of the first switch is controlled according to the load parameter of the open-winding motor, and a control signal is sent to the first power module and the second power module to change an operating state of the driving control circuit, where the control signal includes at least one of:

16. The method of claim 15, wherein the sending control signals to the first power module and the second power module according to the amount of power to change the operating state of the driving control circuit further comprises:

17. The drive control method according to claim 5, wherein the first power module and the second power module each comprise three bridge arms connected in parallel with each other, each bridge arm comprises two switching tubes connected in series with each other, the drive control circuit further comprises a switching module, and the energy storage module and the first input end are connected to the power connection end through a common end;

18. A wiring board comprising the drive control circuit according to any one of claims 1 to 4.

19. An air conditioner, characterized by comprising the circuit board of claim 18, or comprising a memory storing a computer program and a processor implementing the drive control method of any one of claims 5 to 17 when the processor executes the computer program.

20. A computer-readable storage medium characterized in that the storage medium stores a program executed by a processor to implement the drive control method according to any one of claims 5 to 17.