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Control method of self-starting permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of low stability, difficult adjustment of flux linkage, high system cost, etc., and achieve high speed The effect of moment dynamic response

Pending Publication Date: 2022-04-08
ZHONGSHAN DONLIM WEILI ELECTRICAL APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a control method of a self-starting permanent magnet synchronous motor, which is used to solve the problems that the flux linkage is difficult to adjust, the system cost is high, and the stability is low in the control of the permanent magnet synchronous motor

Method used

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  • Control method of self-starting permanent magnet synchronous motor
  • Control method of self-starting permanent magnet synchronous motor
  • Control method of self-starting permanent magnet synchronous motor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0056] An embodiment of the present invention provides a control method for a self-starting permanent magnet synchronous motor, comprising the following steps:

[0057] Input the required torque value, and measure the stator current and rotor speed of the motor;

[0058] Obtain the real-time stator flux state quantity and real-time rotor flux state quantity through the flux linkage measuring device;

[0059] Change the state quantities of the real-time stator flux linkage and the real-time rotor flux linkage according to the required torque value, and control the motion direction of the real-time stator flux linkage and the real-time rotor flux linkage;

[0060] Change the inclination angle of the real-time stator flux linkage and the real-time rotor flux linkage, obtain the modified parameters of the inclination angle, and control the torque of the motor.

[0061] The working principle of the above-mentioned technical scheme is:

[0062]In the prior art of the present inven...

Embodiment 2

[0065] In an embodiment of the present invention: said inputting the required torque value and measuring the real-time stator current and real-time rotor speed of the motor include:

[0066] Determining the stator position signal of the motor through signal detection, performing current detection on the stator position, and obtaining the stator current;

[0067] The stator current is transmitted to a filter for signal filtering, and then input to an A / D conversion circuit for signal conversion to obtain a current digital signal;

[0068] The rotational speed of the rotor is obtained by a speedometer.

[0069] The working principle of the above-mentioned technical scheme is:

[0070] In the prior art of the present invention, the stator position is calculated by a control algorithm, but the accuracy of this algorithm is not enough, and the calculated value often has deviations. The present invention determines the stator position signal of the motor through signal detection, a...

Embodiment 3

[0073] In an embodiment of the present invention: the obtaining of the real-time stator flux state quantity and the real-time rotor flux state quantity through the flux linkage measuring device includes:

[0074] Obtain the amplitude and phase of the real-time stator flux linkage through the measurement results of the flux linkage measuring device;

[0075] Obtain the amplitude and phase of the real-time rotor flux linkage through the measurement results of the flux linkage measuring device;

[0076] According to the amplitude and phase of the real-time stator flux and the real-time rotor flux, state parameters of the stator flux and the rotor flux are extracted.

[0077] The working principle of the above-mentioned technical scheme is:

[0078] In the prior art of the present invention, in the relatively static coordinate system of the mathematical model, the stator flux and rotor flux coordinate systems are established, and the amplitude and phase of the connection between ...

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Abstract

The invention provides a control method for a self-starting permanent magnet synchronous motor, and the method comprises the following steps: inputting a required torque value, and measuring the stator current and rotor speed of the motor; a real-time stator flux linkage state quantity and a real-time rotor flux linkage state quantity are obtained through a flux linkage measurer; changing the state quantities of a real-time stator flux linkage and a real-time rotor flux linkage according to the required torque value quantity, and controlling the movement directions of the real-time stator flux linkage and the real-time rotor flux linkage; and changing the inclination angles of the real-time stator flux linkage and the real-time rotor flux linkage, obtaining modification parameters of the inclination angles, and controlling the torque of the motor.

Description

[0001] The invention relates to the technical field of motors, in particular to a control method for a self-starting permanent magnet synchronous motor. Background technique [0002] The motor is a device that converts electrical energy and mechanical energy. It is widely used in life and is becoming more and more popular in the home appliance industry. Motors are divided into synchronous motors and asynchronous motors. Synchronous motors include permanent magnet synchronous motors, permanent magnet The structure of the synchronous motor is simpler and more reliable. There are many methods to control the permanent magnet synchronous motor, but the commonly used control methods of the permanent magnet synchronous motor are: (1) The constant voltage frequency ratio control method, although this method is also simple in structure, However, the dynamic performance is relatively poor, and there are not many applicable occasions, so it is not universal. (2) The field weakening contro...

Claims

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Application Information

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IPC IPC(8): H02P6/20H02P6/08H02P21/14H02P25/022
CPCY02P80/10
Inventor 陈文忠胡可焕
Owner ZHONGSHAN DONLIM WEILI ELECTRICAL APPLIANCES CO LTD
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