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Control method and system of motor, computer readable storage medium and household appliance

A control method and computer program technology, applied in the direction of controlling electromechanical brakes, control systems, vector control systems, etc., can solve problems such as motor stall and stator flux linkage amplitude fluctuation.

Active Publication Date: 2022-07-08
GUANGDONG MIDEA CONSUMER ELECTRICS MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, the inductance parameter of the motor is calibrated during production, but due to the limitation of the production process, the actual inductance parameter of the finished motor may deviate from the calibrated value. During the motor control process, the deviation of the inductance parameter will cause the stator flux amplitude Fluctuation, causing the motor to stall and other problems

Method used

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  • Control method and system of motor, computer readable storage medium and household appliance
  • Control method and system of motor, computer readable storage medium and household appliance
  • Control method and system of motor, computer readable storage medium and household appliance

Examples

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Embodiment 1

[0045] like figure 1 As shown, an embodiment of the present invention provides a control method for a motor, wherein the control method specifically includes the following steps:

[0046] S102, determine the phase current and phase voltage of the motor;

[0047] S104, determine the actual inductance parameter of the motor according to the phase current and the phase voltage;

[0048] In S102 and S104, according to the actual phase current and phase voltage when the motor is running, the actual inductance parameters of the motor can be determined, which avoids the deviation between the factory-calibrated inductance parameters of the motor and the actual inductance parameters due to objective factors such as the production process. Appear.

[0049] S106: Determine the flux linkage parameter of the motor according to the actual inductance parameter, the phase current and the rotor flux linkage information, and adjust the drive signal of the motor according to the flux linkage p...

Embodiment 2

[0069] like Figure 4 As shown, the control method of the motor provided by the embodiment of the present invention further includes:

[0070] S402, determine the zero-crossing point signal of the driving signal;

[0071] S404, applying a first compensation signal to the motor based on the zero-crossing signal of the driving signal.

[0072] Further, the first compensation signal is a current signal, and the frequency range of the current signal is: 15kHz to 25kHz.

[0073] Among them, for low-voltage motors (such as 12V to 48V DC motors), since they are powered by low-voltage devices such as batteries, when the motor starts, the power supply voltage may not reach the starting voltage of the motor, resulting in the failure of the motor to start.

[0074] In order to avoid the above-mentioned failure to start the motor, in the process of starting the motor, whenever the driving signal of the motor crosses the zero point, the first compensation signal is injected into the driv...

Embodiment 3

[0079] like Figure 5 As shown, the control method of the motor provided by the embodiment of the present invention further includes:

[0080] S502, determine the electrical angle compensation amount of the motor according to the phase current and the phase voltage;

[0081] S504, determining the actual electrical angle of the motor according to the electrical angle compensation amount and the estimated electrical angle of the motor;

[0082] In S502 and S504, the electric angle compensation amount of the motor can be calculated according to the actual phase current and phase voltage of the motor, and the estimated electric angle value is compensated by the electric angle compensation amount to obtain the actual electric angle of the motor, and the actual electric angle can be determined and obtained Closer to the real rotor position.

[0083] S506: Determine the rotor position of the motor according to the actual electrical angle, generate a drive signal based on the rotor ...

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PUM

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Abstract

The present invention provides a motor control method and system, a computer-readable storage medium and a household appliance, wherein the motor control method includes: determining the phase current and phase voltage of the motor, and determining the actual inductance of the motor according to the phase current and phase voltage parameters; determine the flux linkage parameters of the motor according to the actual inductance parameters, phase currents and rotor flux linkage information, and adjust the drive signal of the motor according to the flux linkage parameters to control the motor through the drive signals. The actual inductance parameters of the motor are determined according to the phase current and phase voltage of the motor, and the flux linkage parameters of the motor are determined according to the actual inductance parameters, which can avoid the difference between the actual inductance parameters and the factory-calibrated inductance parameters, which will cause the stator flux linkage amplitude to fluctuate. The amplitude of the stator flux linkage can be controlled to remain unchanged, which is beneficial to realize the torque compensation during low-speed operation, realize the constant output torque of the motor, avoid the stall phenomenon of the motor during low-speed operation, and improve the stability of the motor.

Description

technical field [0001] The present invention relates to the technical field of motor control, and in particular, to a motor control method, a motor control system, a computer-readable storage medium, a household appliance, and an electric vehicle. Background technique [0002] Generally speaking, the inductance parameter of the motor is calibrated during production, but due to the limitation of the production process, the actual inductance parameter of the finished motor may deviate from the calibration value. During the motor control process, the deviation of the inductance parameter will cause the stator flux linkage amplitude. Fluctuations, causing the motor to stall and other problems. SUMMARY OF THE INVENTION [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies. [0004] To this end, a first aspect of the present invention provides a control method for a motor. [0005] A second aspect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/18H02P21/16H02P21/05H02P21/34H02P6/182H02P6/20
CPCH02P21/18H02P21/16H02P21/05H02P21/34H02P6/182H02P6/20Y02T10/72
Inventor 刘锦泉
Owner GUANGDONG MIDEA CONSUMER ELECTRICS MFG CO LTD