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Control method of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor control, motor generator control, AC motor control, etc., and can solve problems such as the influence of motor torque accuracy and motor operating efficiency

Active Publication Date: 2020-02-11
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology

[0003] The invention solves the problem that the motor output torque accuracy and the motor operating efficiency are affected by the inaccurate motor parameters used in the existing permanent magnet synchronous motor control method, and proposes a permanent magnet synchronous motor control method. The control method The motor parameters can be determined accurately in real time, thereby reducing the influence of inaccurate motor parameters on motor control

Method used

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  • Control method of permanent magnet synchronous motor
  • Control method of permanent magnet synchronous motor
  • Control method of permanent magnet synchronous motor

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Embodiment Construction

[0082] The control method of permanent magnet synchronous motor, its control block diagram (such as figure 1 As shown) includes a resolver module 1, a temperature sensor module 2, a stator resistance calculation module 3, a Clark transformation module 4, a Park transformation module 5, a stator inductance calculation look-up module 6, a permanent magnet flux linkage calculation module 7, and a torque calculation module 8. Current calculation module 9, given current generation module 10, robust decoupling controller module 11, PWM modulation module 12, three-phase inverter bridge module 13;

[0083] 1) Resolver module

[0084] The resolver is installed on the permanent magnet synchronous motor, and the rotor position θ of the permanent magnet synchronous motor is obtained through the measurement of the resolver, and the rotor position θ is differentiated to obtain the speed w of the permanent magnet synchronous motor e ;

[0085] 2) Temperature sensor module

[0086] A temp...

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Abstract

The invention relates to a control method of an AC motor, in particular to a control method of a permanent magnet synchronous motor, and solves the problem that the torque accuracy of the motor outputand the operation efficiency of the motor are affected due to the inaccurate motor parameters used in the existing control method of the permanent magnet synchronous motor. According to the control method, the stator resistance Rs (T) is obtained by using online table lookup through the stator temperature T of the motor ; the stator inductance Ld (T) and Lq (T) are obtained by using online tablelookup through the motor stator temperature T, the current amplitude Is and the current vector angle beta; the flux linkage value Psif (Tr) is calculated in real time by using a flux linkage observation model, thus improving the accuracy of motor control and decoupling; and the given stator current is redistributed by using the output result of the torque closed loop so as to maintain the permanent magnet synchronous motor to run according to a better control trajectory and reduce the heating and the loss of the motor. The decoupling control of the motor is realized and the robustness of the motor control system is enhanced.

Description

technical field [0001] The invention relates to a control method of a motor, in particular to a control method of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have been widely used in the field of rail transit due to their advantages of high efficiency, energy saving, and high power density. For permanent magnet synchronous motors, the most important performance requirements are to generate accurate torque and achieve high-efficiency control in various environments, and one of the most important factors affecting the torque accuracy and high-efficiency control of permanent magnet motors is the motor The parameters change during the operation of the motor, which leads to the mismatch between the motor control algorithm and the controlled motor. The change of the motor parameters is mainly caused by the magnetic saturation effect of the iron core caused by the change of the motor operating temperature and the stator c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/14H02P21/22H02P25/022
CPCH02P21/0003H02P21/14H02P21/141H02P25/022H02P2207/05H02P21/22
Inventor 张瑞峰柴璐军王晓妮杨高兴詹哲军梁海刚贺志学
Owner CRRC YONGJI ELECTRIC CO LTD
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