Method, storage medium and equipment for controlling motor

A technology of storage media and equipment, applied in the direction of the deceleration device of the AC motor, the electric motor/converter plug, etc., can solve the problems of the reduction of the transient current of the active short circuit of the motor, and no solution is proposed, and achieve the reduction of the transient current, Accurately and timely reduce the effect of transient current

Active Publication Date: 2018-11-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of active short-circuit operation is: in the process of switching active short-circuit, there will be a large transient current, and after entering the steady state, a certain braking torque will also be output
This method can avoid too much overcurrent, but it needs to know the position information of the motor rotor
[0007] In short, for the current technology that needs to be based on the position information of the motor rotor to achieve the reduction of the transient current of the motor active short circuit, no effective solution has been proposed yet.

Method used

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  • Method, storage medium and equipment for controlling motor
  • Method, storage medium and equipment for controlling motor
  • Method, storage medium and equipment for controlling motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 Shown, a kind of method for controlling motor, this method comprises the following steps:

[0052] (1) Determine the negative voltage components to be applied to the α-axis and β-axis of the motor, and the α-axis and β-axis are two-phase stationary axes corresponding to the three-phase axis of the motor;

[0053] (2) calculating a pulse width modulation signal for controlling an inverter based on the negative voltage component, and the inverter is used to provide three-phase alternating current to the motor;

[0054] (3) applying the pulse width modulation signal to the inverter;

[0055] (4) After a predetermined time, perform an active short-circuit operation on the motor.

[0056] It should be explained that the reasons for choosing to control the external voltage to reduce the excessively high instantaneous current generated by the active short circuit of the motor are as follows:

[0057] First of all, by analyzing the instantaneous current of t...

Embodiment 2

[0095] Such as Figure 4 As shown, a device 400 for controlling a motor, the device includes a processor 401 and a memory 402, the memory 402 is connected to the processor 401, and the memory 402 is used to provide the processor 401 with commands for processing the following processing steps:

[0096] (1) Determine the negative voltage components to be applied to the α-axis and β-axis of the motor, and the α-axis and β-axis are two-phase stationary axes corresponding to the three-phase axis of the motor;

[0097] (2) calculating a pulse width modulation signal for controlling an inverter based on the negative voltage component, and the inverter is used to provide three-phase alternating current to the motor;

[0098] (3) applying the pulse width modulation signal to the inverter;

[0099] (4) After a predetermined time, perform an active short-circuit operation on the motor.

[0100] The negative voltage component described in step (1) is specifically determined as follows: ...

Embodiment 3

[0114] Such as Figure 5 As shown, a device 500 for controlling a motor, the device includes:

[0115] Negative voltage component calculation module 501: used to determine the negative voltage components to be applied to the α-axis and β-axis of the motor, the α-axis and β-axis are two-phase static axes corresponding to the three-phase axes of the motor ;

[0116] A pulse width modulation signal calculation module 502: used to calculate a pulse width modulation signal for controlling an inverter based on the negative voltage component, and the inverter is used to provide three-phase alternating current to the motor;

[0117] A pulse width modulation signal applying module 503: for applying the pulse width modulation signal to the inverter;

[0118] Active short-circuit module 504: for performing active short-circuit operation on the motor after a predetermined time.

[0119] The negative voltage component calculation module 501 includes a first sub-module for determining th...

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Abstract

The invention relates to a method, a storage medium and equipment for controlling a motor. The method comprises steps as follows: (1) determining a negative voltage component to be applied to an alphaaxis and a beta axis of the motor, wherein the alpha axis and the beta axis are two-phase stationary axes corresponding to three-phase axes of the motor; (2) calculating a PWM (pulse width modulation) signal used for controlling an inverter on the basis of the negative voltage component, wherein the inverter is used for providing three-phase alternating current for the motor; (3) applying the PWMsignal to the inverter; (4) after preset time, performing active short-circuiting operation on the motor. Compared with the prior art, the negative control voltage component is applied to the motor,one virtual resistor is added to a resistor of the motor equivalently, and transient current in an active short-circuiting circuit of the motor is accurately and timely reduced without motor rotor position information.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method, storage medium and equipment for controlling a motor. Background technique [0002] As the main power source of electric vehicles, when the motor control system fails, the motor needs to enter a safe state to ensure that the vehicle is under control and will not cause harm to the occupants. However, when the motor controller has a hardware or software failure and the output of the motor is abnormal, the output of braking torque or driving torque is very dangerous. So at present, in electric vehicles, it is usually required that the motor turn off the torque output after entering a safe state, so that the vehicle is in a coasting state, so that the driver can drive the car out of the lane for help. [0003] In the event of a motor controller failure, IGBT operation of any complexity may be unreliable. In the functional safety development of the motor controller, the torque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P3/22
CPCH02P3/22
Inventor 朱元陆科吴志红肖明康李亦舟刘畅
Owner TONGJI UNIV
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