CN116169906A

CN116169906A - Control method, device and medium for pulse active short circuit of permanent magnet synchronous motor

Info

Publication number: CN116169906A
Application number: CN202310242774.4A
Authority: CN
Inventors: 陈兴钊; 余凌飞; 李达; 刘健萍
Original assignee: Invt Electric Vehicle Drive Technology Shenzhen Co ltd
Current assignee: Invt Electric Vehicle Drive Technology Shenzhen Co ltd
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-05-26

Abstract

The application discloses a control method, a device and a medium for pulse active short circuit of a permanent magnet synchronous motor, which are applied to the field of permanent magnet synchronous motor control. The working parameters are acquired first, and then the working state of the permanent magnet synchronous motor is determined according to the working parameters. If the permanent magnet synchronous motor is in an out-of-control state, one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other one is controlled to work according to a preset PWM wave pulse. The duty ratio of the PWM wave needs to be set to gradually increase with time until reaching a preset maximum duty ratio, and the preset maximum duty ratio is set according to a current range that can be born by a controller of the permanent magnet synchronous motor, so as to quickly consume energy at a runaway time of the permanent magnet synchronous motor and inhibit excessive phase current, thereby protecting the permanent magnet synchronous motor and the controller. The scheme solves the problems of overlarge phase current instantaneous value and overlarge final active short-circuit current existing in the complete active short-circuit.

Description

Control method, device and medium for pulse active short circuit of permanent magnet synchronous motor

Technical Field

The present disclosure relates to the field of permanent magnet synchronous motor control, and in particular, to a method, an apparatus, and a medium for controlling pulse active short circuit of a permanent magnet synchronous motor.

Background

When the permanent magnet synchronous motor is out of control, the energy output of the controller and the motor is generally cut off in a mode of turning off all insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT)/Metal-Oxide-semiconductor field effect transistors (MOSFET) or in a mode of actively shorting (Active Short Circuit, ASC). The main disadvantage of the mode of turning off all the IGBTs/MOSFETs is that the counter potential of the permanent magnet synchronous motor is higher when the bus input of the controller is disconnected, and the counter potential of the permanent magnet synchronous motor can be higher than the highest voltage which can be born by the bus capacitor at higher rotation speeds, so that the problem of breakdown of the bus capacitor of the controller can occur. And the active short circuit mode is used, so that the problem can be effectively avoided.

However, in the early stage of the active short circuit, if the current before the active short circuit is large, the problem of too large short-time current may occur, and the limit that the IGBT/MOSFET can withstand may be exceeded, resulting in damage to the IGBT/MOSFET. And the current scheme finally performs a fully active short circuit operation, wherein the three-phase current of the fully active short circuit is a fixed value related to the motor, and the current can be too large to exceed the safety current of the motor and the controller.

Therefore, how to solve the problems of excessive phase current instantaneous value and excessive final active short-circuit current existing in the fully active short-circuit at the same time is a problem to be solved by the person skilled in the art.

Disclosure of Invention

The invention aims to provide a control method, a device and a medium for pulse active short circuit of a permanent magnet synchronous motor, so as to solve the problems of overlarge phase current instantaneous value and overlarge final active short circuit current existing in complete active short circuit.

In order to solve the technical problems, the application provides a control method for pulse active short circuit of a permanent magnet synchronous motor, which comprises the following steps:

acquiring working parameters of the permanent magnet synchronous motor;

determining the working state of the permanent magnet synchronous motor according to the working parameters;

when the permanent magnet synchronous motor is out of control, one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other one is controlled to work according to a preset PWM wave pulse; the duty ratio of the PWM wave is gradually increased along with time until reaching a preset maximum duty ratio, and the preset maximum duty ratio is set according to the current range which can be born by the controller of the permanent magnet synchronous motor.

Preferably, before one of the upper bridge and the lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be turned off and the other is controlled to operate according to a preset PWM wave pulse, the method further includes:

and improving the carrier frequency of the permanent magnet synchronous motor controller.

Preferably, the gradually increasing of the duty ratio of the PWM wave over time includes:

the duty cycle is increased by a preset variation value every one carrier cycle.

Preferably, one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other program corresponding to the operation of the PWM wave pulse is controlled to be a preset pulse active short-circuit program;

when the permanent magnet synchronous motor is out of control, one of an upper bridge and a lower bridge of the IGBT is controlled to be closed, and before the other one is controlled to work according to a preset PWM wave pulse, the method further comprises the following steps:

and stopping running the main algorithm program of the magnetic field phasing control, and starting the pulse active short-circuit program.

Preferably, setting the preset maximum duty cycle according to a current range that can be borne by the controller of the permanent magnet synchronous motor includes:

active short-circuit currents corresponding to the duty ratios with different magnitudes are obtained;

and determining the preset maximum duty ratio according to the maximum current which can be born by the controller of the permanent magnet synchronous motor and the corresponding relation between the duty ratio and the active short-circuit current.

Preferably, the preset maximum duty cycle is less than 1.

Preferably, the multiple of the carrier frequency increase is determined according to the permanent magnet synchronous motor controller.

In order to solve the technical problem, the application also provides a control device for pulse active short circuit of a permanent magnet synchronous motor, which comprises:

the acquisition module is used for acquiring the working parameters of the permanent magnet synchronous motor;

the determining module is used for determining the working state of the permanent magnet synchronous motor according to the working parameters;

the control module is used for controlling one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller to be closed and controlling the other one to work according to a preset PWM wave pulse when the permanent magnet synchronous motor is out of control; the duty ratio of the PWM wave is gradually increased along with time until reaching a preset maximum duty ratio, and the preset maximum duty ratio is set according to the current range which can be born by the controller of the permanent magnet synchronous motor.

Preferably, one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other program corresponding to the operation of the PWM wave pulse is controlled to be a preset pulse active short-circuit program; the control device for the pulse active short circuit of the permanent magnet synchronous motor further comprises: and the switching module is used for controlling one of an upper bridge and a lower bridge of the IGBT to be closed when the permanent magnet synchronous motor is out of control, stopping running a main algorithm program of magnetic field phasing control before the other one of the upper bridge and the lower bridge of the IGBT is controlled to work according to a preset PWM wave pulse, and starting the pulse active short-circuit program.

Preferably, the control device for the pulse active short circuit of the permanent magnet synchronous motor further comprises: and the improving module is used for improving the carrier frequency of the permanent magnet synchronous motor controller before one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed and the other one is controlled to work according to a preset PWM wave pulse.

In order to solve the technical problem, the application also provides a control device for pulse active short circuit of a permanent magnet synchronous motor, which comprises: a memory for storing a computer program;

and the processor is used for realizing the control method of the pulse active short circuit of the permanent magnet synchronous motor when executing the computer program.

In order to solve the technical problem, the application further provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and the computer program realizes the steps of the control method for the pulse active short circuit of the permanent magnet synchronous motor when being executed by a processor.

According to the control method for the pulse active short circuit of the permanent magnet synchronous motor, working parameters of the permanent magnet synchronous motor are obtained, and then the working state of the permanent magnet synchronous motor is determined according to the working parameters. If the state of the permanent magnet synchronous motor is in an out-of-control state, corresponding measures are needed to be taken. According to the method, one of the upper bridge and the lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed by the controller of the permanent magnet synchronous motor, and the other one is controlled to work according to the preset PWM wave pulse. The duty ratio of the PWM wave needs to be set to gradually increase with time until reaching a preset maximum duty ratio, and the preset maximum duty ratio is set according to a current range that can be born by a controller of the permanent magnet synchronous motor, so as to quickly consume energy at a runaway time of the permanent magnet synchronous motor and inhibit excessive phase current, thereby protecting the permanent magnet synchronous motor and the controller. The method mainly performs pulse type active short-circuit action on the basis of general active short-circuit action. Compared with the general active short-circuit action, the pulse type active short-circuit can control the active short-circuit current to be gradually increased so as to protect the motor and the controller from the impact of the instantaneously increased current. The aim of simultaneously limiting the current increasing slope of the motor phase and the final current is achieved by limiting the duty ratio of the finally executed pulse active short circuit, so that the safe operation of the controller and the motor is protected. The scheme solves the problems of overlarge phase current instantaneous value and overlarge final active short-circuit current existing in the complete active short-circuit.

The application also provides a control device and a computer readable storage medium for the pulse active short circuit of the permanent magnet synchronous motor, which correspond to the method, and have the same beneficial effects as the method.

Drawings

For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a control method for pulse active short circuit of a permanent magnet synchronous motor according to an embodiment of the present application;

fig. 2 is a structural diagram of a control device for pulse active short circuit of a permanent magnet synchronous motor according to an embodiment of the present application;

fig. 3 is a structural diagram of a control device for pulse active short circuit of a permanent magnet synchronous motor according to another embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.

The core of the application is to provide a control method, a device and a medium for pulse active short circuit of a permanent magnet synchronous motor, so as to solve the problems of overlarge phase current instantaneous value and overlarge final active short circuit current existing in complete active short circuit.

In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.

The application belongs to the field of permanent magnet synchronous motor control, and relates to a control method for protecting a controller and a motor by pulse active short circuit of a permanent magnet synchronous motor. The existing schemes are all aimed at the regulation before entering the complete active short circuit, and are all based on the carrier frequency during normal control, and the condition that an excessive instantaneous value still appears in the phase current at the initial stage of regulation, so that the impact on the IGBT, the MOSFET and the motor is caused, and even the overcurrent protection threshold of the MOSFET is reached, so that the driving chip is directly turned off for driving. And eventually all of them perform a fully active short circuit operation, the three-phase current of the fully active short circuit is a fixed value associated with the motor, and the current may be too large to exceed the safe current of the motor and the controller. Therefore, in order to overcome the problems, the application provides a control method for the pulse active short circuit of the permanent magnet synchronous motor. Fig. 1 is a flowchart of a control method for pulse active short circuit of a permanent magnet synchronous motor according to an embodiment of the present application; as shown in fig. 1, the method comprises the steps of:

s10: and obtaining the working parameters of the permanent magnet synchronous motor.

S11: and determining the working state of the permanent magnet synchronous motor according to the working parameters.

S12: when the permanent magnet synchronous motor is out of control, one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other one is controlled to work according to a preset PWM wave pulse.

The duty ratio of the PWM wave is gradually increased along with time until reaching a preset maximum duty ratio, wherein the preset maximum duty ratio is set according to the current range which can be born by a controller of the permanent magnet synchronous motor. It should be noted that, in this embodiment, no specific limitation is imposed on how to obtain the working parameters of the permanent magnet synchronous motor, the specific type of the working parameters, how to determine the working state of the permanent magnet synchronous motor according to the working parameters, and the like, and finally, only the working state of the motor can be determined to be a normal state or a runaway state.

The present application proposes a pulse active short circuit mode (abbreviated as pulse ASC) for solving the problems of excessive phase current instantaneous value and excessive final active short circuit current in the conventional scheme, and a specific implementation mode is taken as an example for illustration. When the motor is out of control, the switching frequency (equivalent to carrier frequency) of the IGBT/MOSFET can be firstly increased to be more than 1.5 times of that of the motor in normal use, then one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed, the other one is controlled to work according to a preset PWM wave pulse, the maximum value of the duty ratio of the PWM wave pulse is limited, the energy at the out-of-control moment of the motor is rapidly consumed, the excessive phase current is restrained, and the motor and the controller are protected.

Specifically, some preferred schemes are provided herein, after the controller of the permanent magnet synchronous motor judges that the motor is out of control, the controller can stop running a main algorithm program of field phasing control (FOC), increase the running frequency of the program to more than 1.5 times of the normal running frequency, then run an implementation program of pulse active short circuit, and define the running frequency as the pulse active short circuit carrier frequency (namely F_ASC). Because the FOC algorithm program has more content, the operation time is relatively long, and the FOC is meaningless when the FOC is actively short-circuited after the runaway, in order to improve the operation frequency, the FOC algorithm program can be stopped, and only the program for realizing the pulse active short-circuit is kept to be operated. The pulse active short-circuiting program can select to close all upper bridges, and control the lower bridges to output Duty-cycle duty_ls at carrier frequency f_asc. Alternatively, the lower bridge may be turned off and the upper bridge may be used to output the duty_LS. Wherein, the duty_ls needs to be changed, and the change rule can be selected as follows: on the basis of an initial value duty_ini, duty_ls is self-incremented by a certain value Δduty every one carrier cycle until duty_ls reaches duty_max, wherein at least duty_max <1 is guaranteed, i.e. no fully active short-circuiting is performed. In addition, the preset maximum Duty-cycle duty_max of the final pulse active short circuit depends on the maximum safe current that can be born by the controller and the motor, and the inductance and counter potential coefficient of the motor, the higher the rotating speed is, the larger the counter potential is, and the larger the current is under the same pulse active short circuit maximum Duty cycle. The optional modes are as follows: (1) setting a fixed active short-circuit maximum duty ratio, (2) different active short-circuit maximum duty ratios of different rotating speeds, wherein the higher the rotating speed is, the smaller the maximum duty ratio is. The method (1) is simple and effective to realize, the method (2) realizes the largest possible duty ratio in the safety range to achieve the active short circuit with higher duty ratio, and the active short circuit braking effect is more obvious. Based on knowing Ld (direct axis inductance), lq (quadrature axis inductance) and counter potential coefficient parameters of the motor, the maximum active short-circuit duty ratio allowed by each rotating speed can be directly calculated according to a voltage equation of the permanent magnet synchronous motor and the maximum allowable current; if the more accurate motor parameters are not known, the maximum active short-circuit duty ratio allowed by each rotating speed can be obtained through actual testing.

The pulse type active short circuit provided by the application improves the frequency of the pulse, can control the active short circuit current to gradually increase, and can control the maximum current of the active short circuit by adjusting the maximum duty ratio of the pulse active short circuit so as to protect the motor and the controller from the impact of the instantaneously increased current and the oversized active short circuit peak current. The general active short-circuit action brings larger transient phase current, is likely to be far beyond the current used normally, and can damage the motor and the controller, so that the service lives of the motor and the controller are shortened. If the pulse-type active short circuit based on the normal carrier frequency gradually transits to the full active short circuit, the final full active short circuit current exceeds the maximum current allowed by the motor and the controller on the motor of partial application occasions. The method and the device achieve the purpose of limiting the current increasing slope and the final current of the motor phase by improving the carrier frequency of the pulse active short circuit and limiting the duty ratio of the pulse active short circuit which is finally executed, so that the safe operation of the controller and the motor is protected.

For example, in a sensorless ultra-high speed motor with a maximum speed of 15 ten thousand revolutions, the peak current of the normal output is 84A, while the peak current of the active short circuit of the motor is about 130A, which is far higher than the peak current required by the normal operation of the motor. Under abnormal conditions such as motor out of control, when the high voltage of controller busbar is normally connected, can directly close the pipe and regard as protection means. However, when the bus high voltage is disconnected, the risk that the controller capacitor and the power module are damaged due to the fact that the back electromotive force is too large is caused by the direct closing pipe halt, and the problems that the slope of the transient current of the active short circuit is too large and the steady-state current of the active short circuit is too large are caused by the direct active short circuit, and the peak current of the front section of the active short circuit can reach 250A. At present, the scheme can effectively control the instantaneous peak current of the active short circuit, but the accurate position of the motor rotor needs to be known, and the application occasion without a position sensor is not applicable at all. If the linear duty cycle active short circuit method is simply adopted, the peak current of the front section of the active short circuit can be effectively controlled, but larger current still can be generated, and the large current of the final active short circuit cannot be avoided. According to the method, the high-frequency pulse active short circuit is realized by improving the carrier frequency, the peak current of the active short circuit can be controlled to be gradually increased, and the increasing slope of the active short circuit current is in a range which can be born by a controller and a motor. Taking the motor in the above example as an example, in actual operation, before entering an active short circuit, the carrier frequency is 80kHz, after entering a pulse active short circuit, the carrier frequency is increased to 200kHz, duty_ini (initial Duty cycle) =0.05, Δduty (added value per operation cycle) =0.01, duty_max=0.6, and the three-phase current is gradually increased, and after duty_ls (lower bridge Duty cycle) reaches duty_max, the three-phase current is similar to but smaller than the full active short circuit current. The duty_max is reduced to 0.4, with the result that the maximum value of the three-phase current is further reduced to around 110A. According to the safe current of the motor and the controller of the present example, duty_ini=0.05, Δduty=0.0005, duty_max=0.2 is set, and the peak current of the motor can be perfectly controlled within the safe current 80A. If a high carrier frequency is not used, the carrier frequency is kept at 80khz, duty_ini=0.05, Δduty=0.01, duty_max=0.4, the current waveform has more obvious fluctuation, the fluctuation current can cause motor vibration, and the bearing is damaged, especially the damage of the air bearing of the ultra-high speed motor is more obvious. The solution provided by the embodiment of the application can effectively solve the problems existing in the current solution through the results obtained by actual operation.

The above describes the control method of the pulse active short circuit of the permanent magnet synchronous motor provided by the embodiment of the present application in detail, and specific examples are applied to the description of the principle and the implementation of the present application, and the description of the above examples is only used for helping to understand the method and the core idea of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

As mentioned in the above embodiments, the duty cycle of the PWM wave is gradually increased over time until the preset maximum duty cycle is reached. In practical applications, the manner in which the duty cycle increases is not limited, and a specific scheme is provided in the embodiments of the present application. The gradual increase of the duty cycle of the PWM wave over time includes: the duty cycle is increased by a preset variation value every one carrier cycle. In practical application, the specific mode of setting the preset maximum duty ratio according to the current range that the controller of the permanent magnet synchronous motor can bear may be to obtain active short-circuit currents corresponding to duty ratios of different magnitudes, and then determine the preset maximum duty ratio according to the maximum current that the controller of the permanent magnet synchronous motor can bear and the corresponding relationship between the duty ratio and the active short-circuit current. Wherein it is generally necessary to ensure that the preset maximum duty cycle is less than 1. Specifically, one of the upper bridge or the lower bridge is controlled to output the duty_ls at the carrier frequency f_asc. Wherein, the duty_ls needs to be changed, and the change rule can be selected as follows: on the basis of an initial value duty_ini, duty_ls is self-incremented by a certain value Δduty every one carrier cycle until duty_ls reaches duty_max, wherein at least duty_max <1 is guaranteed, i.e. no fully active short-circuiting is performed. Duty_max is the preset maximum Duty cycle, and Δduty is the preset variation value. The specific values of the carrier frequency f_asc, the duty_ls, the initial value duty_ini, the preset variation value Δduty, and the preset maximum duty_max mentioned in this example are not limited, and suitable values may be selected according to actual situations. The preset maximum duty ratio can be determined by directly calculating motor parameters and a voltage equation or by using a large-specification IGBT/MOSFET to perform actual sustainable maximum duty ratio test.

In practical application, the FOC algorithm has more program content, relatively long running time and meaningless running of the FOC when the FOC is actively shorted after the runaway, so that a single pulse active shorting program is generally additionally set, and the specific content of the program comprises a program for controlling one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller to be closed and controlling the other to work correspondingly according to a preset PWM wave pulse. When the permanent magnet synchronous motor is out of control, one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and before the other one is controlled to work according to a preset PWM wave pulse, the method further comprises the following steps: the main algorithm program of the magnetic field phasing control is stopped, and the pulse active short-circuit program is started. Specifically, after the controller of the permanent magnet synchronous motor judges that the motor is out of control, stopping running a main algorithm program of field phasing control (FOC), increasing the running frequency of the program to more than 1.5 times of the normal running frequency, and then running an implementation program of pulse active short circuit, wherein the running frequency is defined as the pulse active short circuit carrier frequency (namely F_ASC). Because the FOC algorithm program has more content, the operation time is relatively long, and the FOC is meaningless when the FOC is actively short-circuited after the runaway, in order to improve the operation frequency, the FOC algorithm program can be stopped, and only the program for realizing the pulse active short-circuit is kept to be operated.

In a specific implementation, in order to realize shorter pulse, before one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed and the other is controlled to work according to a preset PWM wave pulse, the method further includes: and the carrier frequency of the permanent magnet synchronous motor controller is improved. In practical application, the improvement multiple of the carrier frequency is not specifically required, and the improvement multiple of the carrier frequency can be determined according to the permanent magnet synchronous motor, and generally needs to be improved to more than 1.5 times of the normal operating frequency. According to the embodiment of the application, the high-frequency pulse active short circuit is realized by improving the carrier frequency, the peak current of the active short circuit can be controlled to be gradually increased, and the increasing slope of the active short circuit current is in the bearable range of the controller and the motor. The embodiment of the application mainly carries out pulse type active short-circuit action for raising carrier frequency on the basis of general active short-circuit action. Compared with the general active short-circuit action and the improved pulse active short-circuit, the pulse active short-circuit in the embodiment improves the pulse frequency, and can control the active short-circuit current to be gradually increased so as to protect the motor and the controller from the impact of the instantaneously increased current.

At present, a virtual resistor is equivalently added on the motor resistor through negative voltage components of an alpha axis and a beta axis, so that the purpose of reducing transient current in an active short circuit of the motor is achieved, and meanwhile, motor rotor position information is not required to be detected. However, the method is complex, the tube is still normally switched when the machine is required to be stopped, the required negative voltage component is realized, and the short-circuit operation is actively performed after the preset time. Therefore, the scheme provided by the application can effectively solve the problems of the current schemes, and simultaneously solve the problems of overlarge phase current instantaneous value and overlarge final active short-circuit current existing in the complete active short-circuit.

In the above embodiments, the method for controlling the pulse active short circuit of the permanent magnet synchronous motor is described in detail, and the application also provides a corresponding embodiment of the device for controlling the pulse active short circuit of the permanent magnet synchronous motor. It should be noted that the present application describes an embodiment of the device portion from two angles, one based on the angle of the functional module and the other based on the angle of the hardware.

Based on the angle of the functional module, this embodiment provides a control device for pulse active short-circuit of a permanent magnet synchronous motor, and fig. 2 is a structural diagram of the control device for pulse active short-circuit of a permanent magnet synchronous motor, as shown in fig. 2, where the device includes:

the acquisition module 10 is used for acquiring the working parameters of the permanent magnet synchronous motor;

the determining module 11 is used for determining the working state of the permanent magnet synchronous motor according to the working parameters;

the control module 12 is used for controlling one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller to be closed and controlling the other one to work according to a preset PWM wave pulse when the permanent magnet synchronous motor is out of control; the duty ratio of the PWM wave is gradually increased along with time until reaching a preset maximum duty ratio, wherein the preset maximum duty ratio is set according to the current range which can be born by a controller of the permanent magnet synchronous motor.

Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.

As a preferred embodiment, one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other program corresponding to the operation of the PWM wave pulse is controlled to be a preset pulse active short-circuit program; the control device for the pulse active short circuit of the permanent magnet synchronous motor further comprises: and the switching module is used for controlling one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller to be closed when the permanent magnet synchronous motor is out of control, stopping running a main algorithm program of magnetic field phasing control and starting a pulse active short-circuit program before the other one of the upper bridge and the lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to work according to a preset PWM wave pulse.

The control device for the pulse active short circuit of the permanent magnet synchronous motor further comprises: and the improving module is used for improving the carrier frequency of the permanent magnet synchronous motor controller before one of an upper bridge and a lower bridge of the IGBT of the permanent magnet synchronous motor controller is controlled to be closed and the other one is controlled to work according to a preset PWM wave pulse.

The control device for the pulse active short circuit of the permanent magnet synchronous motor provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.

Based on the hardware angle, the embodiment provides another control device for active pulse short-circuit of a permanent magnet synchronous motor, and fig. 3 is a structural diagram of the control device for active pulse short-circuit of a permanent magnet synchronous motor according to another embodiment of the present application, as shown in fig. 3, where the control device for active pulse short-circuit of a permanent magnet synchronous motor includes: a memory 20 for storing a computer program;

a processor 21 for implementing the steps of the control method of the permanent magnet synchronous motor pulse active short circuit as mentioned in the above embodiments when executing a computer program.

Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, DSP), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU) for taking care of rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.

Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, where the computer program, after being loaded and executed by the processor 21, can implement the relevant steps of the control method for pulse active short-circuiting of a permanent magnet synchronous motor disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, data related to a control method of the pulse active short circuit of the permanent magnet synchronous motor, and the like.

In some embodiments, the control device for active short-circuiting of pulses of the permanent magnet synchronous motor may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

It will be appreciated by those skilled in the art that the configuration shown in the figures does not constitute a limitation of the control means for active shorting of pulses of the permanent magnet synchronous motor and may include more or fewer components than shown.

The control device for the pulse active short circuit of the permanent magnet synchronous motor, provided by the embodiment of the application, comprises a memory and a processor, wherein the processor can realize the following method when executing a program stored in the memory: a control method for pulse active short circuit of a permanent magnet synchronous motor.

Finally, the present application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.

It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The computer readable storage medium provided in the present embodiment corresponds to the above method, and thus has the same advantageous effects as the above method.

The control method, the device and the medium for the pulse active short circuit of the permanent magnet synchronous motor are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. The control method of the pulse active short circuit of the permanent magnet synchronous motor is characterized by comprising the following steps of:

acquiring working parameters of the permanent magnet synchronous motor;

2. The method for controlling an active short circuit of a pulse of a permanent magnet synchronous motor according to claim 1, wherein before one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is closed and the other is controlled to operate according to a preset PWM wave pulse, further comprising:

3. The method for controlling an active short circuit of a pulse of a permanent magnet synchronous motor according to claim 2, wherein the gradual increase of the duty cycle of the PWM wave over time comprises:

4. The method for controlling pulse active short-circuiting of a permanent magnet synchronous motor according to claim 3, wherein one of an upper bridge and a lower bridge of an IGBT of the permanent magnet synchronous motor controller is controlled to be closed, and the other program corresponding to the operation of the permanent magnet synchronous motor controller according to the preset PWM wave pulse is controlled to be a preset pulse active short-circuiting program;

5. The method for controlling pulse active short-circuiting of a permanent magnet synchronous motor according to claim 1, wherein setting the preset maximum duty cycle according to a current range that can be sustained by a controller of the permanent magnet synchronous motor includes:

6. The method for controlling pulse active short circuit of a permanent magnet synchronous motor according to claim 5, wherein the preset maximum duty cycle is less than 1.

7. The method for controlling pulse active short-circuiting of a permanent magnet synchronous motor according to claim 2, wherein the multiple of the increase in carrier frequency is determined according to the permanent magnet synchronous motor controller.

8. The utility model provides a controlling means of permanent magnet synchronous motor pulse initiative short circuit which characterized in that includes:

9. The control device for the pulse active short circuit of the permanent magnet synchronous motor is characterized by comprising a memory for storing a computer program;

a processor for implementing the steps of the control method for pulse active short-circuiting of a permanent magnet synchronous motor according to any of claims 1 to 7 when executing said computer program.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method for controlling active short-circuiting of pulses of a permanent magnet synchronous motor according to any of claims 1 to 7.