CN104410343B - Excitation control method and system, controller and air conditioner outdoor unit - Google Patents
Excitation control method and system, controller and air conditioner outdoor unit Download PDFInfo
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- CN104410343B CN104410343B CN201410822853.3A CN201410822853A CN104410343B CN 104410343 B CN104410343 B CN 104410343B CN 201410822853 A CN201410822853 A CN 201410822853A CN 104410343 B CN104410343 B CN 104410343B
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- 230000005284 excitation Effects 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010248 power generation Methods 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/38—Self-excitation by current derived from rectification of both output voltage and output current of generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/01—Asynchronous machines
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Abstract
According to the excitation control method, the excitation control system, the controller and the air conditioner external unit provided by the embodiment of the invention, when the direct-current excitation power supply supplies current to the exciter stator, the exciter stator is connected with direct current to generate a constant magnetic field, when the exciter stator and the rotor move relatively, the exciter rotor cuts magnetic force lines to generate induced electromotive force, the first switch is closed, and the second switch is opened, so that alternating current output by the exciter rotor is converted into direct current after passing through the rectifying module, direct current required by the constant magnetic field generated by the motor rotor of the air conditioner external unit is provided, the alternating current induced electromotive force can be generated in the motor stator, the first switch is opened, the second switch is closed, the motor is switched from a separate excitation power generation mode to a self excitation mode, and self excitation of the motor in the air conditioner external unit is realized.
Description
Technical Field
The invention relates to the technical field of control, in particular to an excitation control method, an excitation control system, a controller and an air conditioner outdoor unit.
Background
Along with the popularization of the variable frequency air conditioner, energy-saving and environment-friendly air conditioner products are more and more concerned by people. In the times of high-rise urban living environment, wind power resources among buildings are abundant, and if the wind power resources can be converted into electric energy by using an air conditioner external unit fan (namely, a motor in the air conditioner external unit), the energy-saving effect of the air conditioner is further improved.
However, the inventor researches and discovers that most of the existing air conditioner external fans are squirrel-cage induction asynchronous motors, rotors of the existing air conditioner external fans are formed by cast aluminum squirrel cage bars, if the motors are allowed to be Yuxing, the rotating speed of the motors needs to be larger than the synchronous rotating speed in a power generation state, but most of the air conditioner external fans are in a direct current driving connection mode, and the rotating speed cannot be larger than the synchronous rotating speed at all under the condition of wind power dragging. Therefore, the motor rotor itself must have self-excitation characteristics.
Therefore, how to make the self-excitation of the motor in the air conditioner external machine becomes the problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an excitation control method, an excitation control system, a controller and an air conditioner external unit, so that a motor in the air conditioner external unit is self-excited.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
an excitation control method is applied to an air conditioner outdoor unit, and the air conditioner outdoor unit comprises the following steps: an excitation control system and a motor; the excitation control system includes: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the method comprises the following steps:
the air conditioner controller monitors whether the air conditioner external unit is switched to a power generation mode;
when the air conditioner external unit is monitored to be switched to a power generation mode, the air conditioner controller controls the first switch to be closed and controls the second switch to be opened;
and when monitoring that the current output by the motor stator is greater than a preset threshold value, the air conditioner controller controls the first switch to be switched off and controls the second switch to be switched on.
The above method, preferably, further comprises:
and when monitoring that the air conditioner external unit is switched to an electric mode, the air conditioner controller controls the first switch and the second switch to be switched off.
An air conditioner controller is applied to an air conditioner outer unit, and the air conditioner outer unit comprises: an excitation system and a motor; the excitation system includes: the direct-current excitation circuit comprises a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the air conditioner controller includes:
the monitoring module is used for monitoring whether the air conditioner external unit is switched to a power generation mode;
the first control module is used for controlling the first switch to be closed and the second switch to be disconnected when the monitoring module monitors that the air conditioner external unit is switched to a power generation mode;
and the second control module is used for controlling the first switch to be switched off and the second switch to be switched on when the monitored current output by the motor stator is greater than a preset threshold value.
The air conditioner controller preferably further includes:
and the third control module is used for controlling the first switch and the second switch to be switched off when the air conditioner external unit is switched to the electric mode.
An excitation control system applied to an air conditioner outdoor unit, the system comprising: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; wherein,
the exciter comprises an exciter stator and an exciter rotor, and the exciter stator and the exciter rotor are wound by adopting enameled wires;
the direct-current excitation power supply is connected with the exciter stator through the first switch;
the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor in the air conditioner external unit; the rotor of the motor is wound by adopting an enameled wire;
the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, and the alternating current output end of the rectification inversion module outputs alternating current;
the exciter rotor, the rotor of the motor and the rectification module are arranged on a main shaft of the motor;
the air conditioner controller is connected with the first switch, the second switch and the stator of the motor and is used for closing the first switch and disconnecting the second switch when the situation that the air conditioner external unit is switched to a power generation mode is monitored; and when the monitored current output by the motor stator is greater than a preset threshold value, the first switch is switched off, and the second switch is switched on.
In the excitation control system, preferably, the rectifier module is a switching diode or a thyristor.
An outdoor unit of an air conditioner, comprising: an excitation control system and a motor; the excitation control system includes: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the air conditioner controller includes: the monitoring module is used for monitoring whether the air conditioner external unit is switched to a power generation mode; the first control module is used for controlling the first switch to be closed and the second switch to be disconnected when the monitoring module monitors that the air conditioner external unit is switched to a power generation mode; and the second control module is used for controlling the first switch to be switched off and the second switch to be switched on when the monitored current output by the motor stator is greater than a preset threshold value.
Preferably, the air conditioner controller further includes:
and the third control module is used for controlling the first switch and the second switch to be switched off when the air conditioner external unit is switched to the electric mode.
Preferably, the rectification module of the air conditioner outdoor unit is a switching diode or a thyristor.
According to the excitation control method, the excitation control system, the controller and the air conditioner external unit provided by the embodiment of the invention, when the direct-current excitation power supply supplies current to the exciter stator, the exciter stator is connected with direct current to generate a constant magnetic field, when the exciter stator and the rotor move relatively, the exciter rotor cuts magnetic force lines to generate induced electromotive force, the first switch is closed, and the second switch is opened, so that alternating current output by the exciter rotor is converted into direct current after passing through the rectifying module, direct current required by the constant magnetic field generated by the motor rotor of the air conditioner external unit is provided, alternating-current induced electromotive force can be generated in the motor stator, the first switch is opened, the second switch is closed, the motor is switched from a separately-excited power generation mode to a self-excited mode, and self-excitation of the motor in the air conditioner external unit is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1a is an electrical schematic diagram of an excitation control system provided by an embodiment of the invention;
fig. 1b is a schematic diagram illustrating a connection relationship between an exciter and a rectifier module provided in an embodiment of the present invention and a motor in an external unit of an air conditioner;
fig. 2 is a flowchart of an implementation of an excitation control method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner controller according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of an air conditioner controller according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1a, fig. 1a is an electrical schematic diagram of an excitation control system according to an embodiment of the present invention, which may include:
the air conditioner comprises an air conditioner controller 11, a direct-current excitation power supply 12, an exciter 13, a first switch Q1, a second switch Q2, a rectifying module 14 and a rectifying and inverting module 15; wherein,
the exciter 13 includes an exciter stator 131 and an exciter rotor 132, and the exciter stator 131 and the exciter rotor 132 are wound with enameled wires.
The dc excitation power source 12 is connected to the exciter stator 131 through a first switch Q1 for providing dc excitation to the exciter 13.
The input end of the rectification module 14 is connected with the exciter rotor 132, the output end of the rectification module 14 is connected with the rotor of the motor in the air conditioner external unit, and the rotor of the motor is wound by sampling enameled wires;
the input end of the rectification inversion module 15 is connected with the stator of the motor, the dc output end of the rectification inversion module 15 is connected with the common end of the first switch Q1 and the exciter stator 131 through the second switch Q2, and the ac output end of the rectification inversion module 15 outputs ac power.
In the embodiment of the present invention, the rectification and inversion module 15 is configured to convert ac output by the motor stator into dc, and then convert the dc obtained by conversion into power frequency ac for output. The output alternating current is alternating current at power frequency (namely, alternating current at 50 Hz). After the rectification inversion module 15 converts the alternating current output by the motor stator into direct current, the direct current can be output through a direct current output end.
As shown in fig. 1b, the exciter rotor 132, the rotor of the motor in the air-conditioning outdoor unit, and the rectifier module 14 are mounted on the main shaft of the motor in the air-conditioning outdoor unit; fig. 1b is a schematic diagram illustrating a connection relationship between an exciter and a rectifier module according to an embodiment of the present invention and a motor in an external unit of an air conditioner. When the main shaft of the motor is dragged by wind power to rotate, the exciter stator and the exciter rotor move relatively, and the stator and the rotor of the motor in the air conditioner external unit also move relatively.
The air conditioner controller 11 is respectively connected with a first switch Q1, a second switch Q2 and a stator of a motor of the air conditioner outdoor unit, and is used for closing the first switch Q1 and opening the second switch Q2 when the air conditioner outdoor unit is monitored to be switched to a power generation mode; when the current output by the motor stator is monitored to be larger than the preset threshold value, the first switch Q1 is opened, and the second switch Q2 is closed. Preferably, when the current output by the motor stator is monitored to be greater than 50% of the rated working current of the motor stator, the first switch Q1 is opened, and the second switch Q2 is closed.
According to the excitation control system provided by the embodiment of the invention, when the direct-current excitation power supply supplies current to the exciter stator, the exciter stator is connected with direct current to generate a constant magnetic field, when the exciter stator and the rotor move relatively, the exciter rotor cuts magnetic force lines to generate induced electromotive force, the first switch is closed, the second switch is opened, therefore, alternating current output by the exciter rotor is converted into direct current after passing through the rectifying module, and direct current required by the constant magnetic field generated by the motor rotor of the air conditioner external unit is provided, so that alternating-current induced electromotive force can be generated in the motor stator, the first switch is opened, the second switch is closed, the motor is switched from a power generation mode of other excitation to a self-excitation mode, and self-excitation of the motor in the air conditioner external unit is realized.
In the above embodiment, optionally, the rectifying module 14 may be a switching diode or a thyristor, and the rectifying module 14 may also be formed by a switching diode or a thyristor.
The application also provides an excitation control method, which is applied to an air conditioner external unit, wherein the air conditioner external unit comprises: an excitation control system and a motor; as shown in fig. 1, the excitation control system may include: the air conditioner comprises an air conditioner controller 11, a direct-current excitation power supply 12, an exciter 13, a first switch Q1, a second switch Q2, a rectifying module 14 and a rectifying and inverting module 15; the exciter 13 comprises an exciter stator 131 and an exciter rotor 132, and the exciter stator 131 and the exciter rotor 132 are wound by enameled wires; the dc excitation power source 12 is connected to the exciter stator 131 through a first switch Q1; the input end of the rectification module 14 is connected to the exciter rotor 132, and the output end of the rectification module 14 is connected to the rotor of the motor in the air conditioner external unit; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module 15 is connected with the stator of the motor, the dc output end of the rectification inversion module 15 is connected with the common end of the first switch Q1 and the exciter stator 131 through the second switch Q2, and the ac output end of the rectification inversion module 15 outputs ac power. The exciter rotor 132, the rotor of the motor and the commutation module 14 are mounted on the main shaft of the motor; an implementation flowchart of the excitation control method provided in the embodiment of the present invention is shown in fig. 2, and may include:
step S21: the air conditioner controller monitors whether the air conditioner external unit is switched to a power generation mode;
specifically, when it is monitored that the first switching instruction is generated, it can be determined that the air conditioner external unit is switched to the power generation mode. The first switching instruction is used for instructing to switch from the electric mode to the power generation mode.
Step S22: when the air conditioner external unit is monitored to be switched to a power generation mode, the air conditioner controller controls the first switch to be closed and controls the second switch to be opened;
when the exciter stator and the conversion relative motion are carried out, the alternating current output by the exciter rotor is converted into direct current through the rectifying module, and the direct current required by the constant magnetic field generated by the motor rotor of the air conditioner external unit is provided, so that alternating current induced electromotive force can be generated in the motor stator.
Step S23: and when monitoring that the current output by the motor stator is greater than a preset threshold value, the air conditioner controller controls the first switch to be switched off and controls the second switch to be switched on.
When the first switch is switched off and the second switch is switched on, alternating current generated in the motor stator is converted into direct current after passing through the rectification inversion module, and the direct current required by a constant magnetic field generated by a motor rotor of the air conditioner external unit is provided, so that alternating current induced electromotive force can be generated in the motor stator. The self-excitation power generation mode of the motor is switched from the other excitation power generation mode to the self-excitation power generation mode, and the self-excitation of the motor in the air conditioner external unit is realized.
On the basis of the embodiment shown in fig. 2, the excitation control method provided by the present application may further include:
and when the air conditioner controller monitors that the air conditioner external unit is switched to the electric mode, the first switch and the second switch are controlled to be switched off.
Specifically, when it is monitored that the second switching instruction is generated, it may be determined that the air conditioner external unit is switched to the electric mode. The second switching instruction is used for indicating the switching from the power generation mode to the electric mode.
Corresponding to the embodiment of the method, the application also provides an air conditioner controller, and the air conditioner controller provided by the application is applied to an air conditioner external unit, and the air conditioner external unit comprises: an excitation system and a motor; the excitation system includes: the direct-current excitation circuit comprises a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; a schematic structural diagram of an air conditioner controller provided in an embodiment of the present invention is shown in fig. 3, and may include:
a monitoring module 31, a first control module 32 and a second control module 33; wherein,
the monitoring module 31 is used for monitoring whether the air conditioner external unit is switched to a power generation mode;
the monitoring module 31 may determine that the air conditioner external unit is switched to the power generation mode when it is monitored that the first switching instruction is generated. The first switching instruction is used for instructing to switch from the electric mode to the power generation mode.
The first control module 32 is configured to control the first switch to be turned on and the second switch to be turned off when the monitoring module monitors that the air conditioner external unit is switched to the power generation mode;
when the exciter stator and the conversion relative motion are carried out, the alternating current output by the exciter rotor is converted into direct current through the rectifying module, and the direct current required by the constant magnetic field generated by the motor rotor of the air conditioner external unit is provided, so that alternating current induced electromotive force can be generated in the motor stator.
The second control module 33 is configured to control the first switch to be turned off and control the second switch to be turned on when it is monitored that the current output by the motor stator is greater than a preset threshold.
When the first switch is switched off and the second switch is switched on, alternating current generated in the motor stator is converted into direct current through the rectifying module, and the direct current required by a constant magnetic field generated by a motor rotor of the air conditioner outdoor unit is provided, so that alternating current induced electromotive force can be generated in the motor stator. The self-excitation power generation mode of the motor is switched from the other excitation power generation mode to the self-excitation power generation mode, and the self-excitation of the motor in the air conditioner external unit is realized.
On the basis of the embodiment shown in fig. 3, another schematic structural diagram of the air conditioner controller provided by the present application is shown in fig. 4, and may further include:
and a third control module 41, configured to control both the first switch and the second switch to be turned off when the air conditioner external unit is switched to the electric mode.
The third control module 41 may determine that the air conditioner external unit is switched to the electric mode when it is monitored that the second switching instruction is generated. The second switching instruction is used for indicating the switching from the power generation mode to the electric mode.
The application still provides an outer machine of air conditioner, includes: an excitation control system and a motor; the excitation control system includes: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the air conditioner controller includes: the monitoring module is used for monitoring whether the air conditioner external unit is switched to a power generation mode; the first control module is used for controlling the first switch to be closed and the second switch to be disconnected when the monitoring module monitors that the air conditioner external unit is switched to a power generation mode; and the second control module is used for controlling the first switch to be switched off and the second switch to be switched on when the monitored current output by the motor stator is greater than a preset threshold value.
Further, the air conditioner controller may further include:
and the third control module is used for controlling the first switch and the second switch to be switched off when the air conditioner external unit is switched to the electric mode.
Optionally, the rectifying module may be a switching diode or a thyristor, and the rectifying module 14 may also be formed by a switching diode or a thyristor.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the devices is merely a logical division, and other divisions may be realized in practice, for example, a plurality of devices or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, and the indirect coupling or communication connection of the devices may be in an electrical, mechanical or other form.
In addition, each control device in each embodiment of the present invention may be integrated into one processing unit, each unit may exist alone physically, or two or more units may be integrated into one unit.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An excitation control method is applied to an air conditioner external unit, and is characterized in that the air conditioner external unit comprises: an excitation control system and a motor; the excitation control system includes: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the method comprises the following steps:
the air conditioner controller monitors whether the air conditioner external unit is switched to a power generation mode;
when the air conditioner external unit is monitored to be switched to a power generation mode, the air conditioner controller controls the first switch to be closed and controls the second switch to be opened;
and when monitoring that the current output by the motor stator is greater than a preset threshold value, the air conditioner controller controls the first switch to be switched off and controls the second switch to be switched on.
2. The method of claim 1, further comprising:
and when monitoring that the air conditioner external unit is switched to an electric mode, the air conditioner controller controls the first switch and the second switch to be switched off.
3. The utility model provides an air conditioner controller is applied to outer machine of air conditioner, its characterized in that, outer machine of air conditioner includes: an excitation system and a motor; the excitation system includes: the direct-current excitation circuit comprises a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the air conditioner controller includes:
the monitoring module is used for monitoring whether the air conditioner external unit is switched to a power generation mode;
the first control module is used for controlling the first switch to be closed and the second switch to be disconnected when the monitoring module monitors that the air conditioner external unit is switched to a power generation mode;
and the second control module is used for controlling the first switch to be switched off and the second switch to be switched on when the monitored current output by the motor stator is greater than a preset threshold value.
4. The air conditioner controller according to claim 3, further comprising:
and the third control module is used for controlling the first switch and the second switch to be switched off when the air conditioner external unit is switched to the electric mode.
5. An excitation control system is applied to an air conditioner outdoor unit, and is characterized by comprising: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; wherein,
the exciter comprises an exciter stator and an exciter rotor, and the exciter stator and the exciter rotor are wound by adopting enameled wires;
the direct-current excitation power supply is connected with the exciter stator through the first switch;
the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor in the air conditioner external unit; the rotor of the motor is wound by adopting an enameled wire;
the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, and the alternating current output end of the rectification inversion module outputs alternating current;
the exciter rotor, the rotor of the motor and the rectification module are arranged on a main shaft of the motor;
the air conditioner controller is connected with the first switch, the second switch and the stator of the motor and is used for closing the first switch and disconnecting the second switch when the situation that the air conditioner external unit is switched to a power generation mode is monitored; and when the monitored current output by the motor stator is greater than a preset threshold value, the first switch is switched off, and the second switch is switched on.
6. The system of claim 5, wherein the rectification module is a switching diode or thyristor.
7. An outdoor unit for an air conditioner, comprising: an excitation control system and a motor; the excitation control system includes: the device comprises an air conditioner controller, a direct-current excitation power supply, an exciter, a first switch, a second switch, a rectifying module and a rectifying and inverting module; the exciter comprises an exciter stator and an exciter rotor, wherein the exciter stator and the exciter rotor are wound by enameled wires; the direct-current excitation power supply is connected with the exciter stator through the first switch; the input end of the rectification module is connected with the exciter rotor, and the output end of the rectification module is connected with the rotor of the motor; the rotor of the motor is wound by adopting an enameled wire; the input end of the rectification inversion module is connected with the stator of the motor, the direct current output end of the rectification inversion module is connected with the common end of the first switch and the exciter stator through the second switch, the alternating current output end of the rectification inversion module outputs alternating current, and the exciter rotor, the rotor of the motor and the rectification module are installed on the main shaft of the motor; the air conditioner controller includes: the monitoring module is used for monitoring whether the air conditioner external unit is switched to a power generation mode; the first control module is used for controlling the first switch to be closed and the second switch to be disconnected when the monitoring module monitors that the air conditioner external unit is switched to a power generation mode; and the second control module is used for controlling the first switch to be switched off and the second switch to be switched on when the monitored current output by the motor stator is greater than a preset threshold value.
8. The outdoor unit claimed in claim 7, wherein the air conditioner controller further comprises:
and the third control module is used for controlling the first switch and the second switch to be switched off when the air conditioner external unit is switched to the electric mode.
9. The outdoor unit of claim 7 or 8, wherein the rectification module is a switching diode or a thyristor.
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| CN201410822853.3A CN104410343B (en) | 2014-12-22 | 2014-12-22 | Excitation control method and system, controller and air conditioner outdoor unit |
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| CN201410822853.3A CN104410343B (en) | 2014-12-22 | 2014-12-22 | Excitation control method and system, controller and air conditioner outdoor unit |
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| CN86107898A (en) * | 1986-11-18 | 1987-08-12 | 宋怀淳 | Generator with AC field excitation, variable-speed and constant |
| JP3550485B2 (en) * | 1997-06-27 | 2004-08-04 | 東芝キヤリア株式会社 | DC power supply and air conditioner |
| JP2000130825A (en) * | 1998-10-26 | 2000-05-12 | Toshiba Kyaria Kk | Outdoor machine drive control unit of air conditioner |
| JP2005337519A (en) * | 2004-05-24 | 2005-12-08 | Toshiba Kyaria Kk | Air conditioner |
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