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Method for improving control performance of permanent magnet synchronous motor

A permanent magnet synchronous motor, control performance technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem of slow response speed of the observer, to improve the response speed and anti-disturbance, reduce Small chattering, avoiding the effect of direct measurement

Active Publication Date: 2018-11-23
SHANGHAI DIANJI UNIV
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Problems solved by technology

[0003] Specifically, for the observer method, it observes the load disturbance in real time and transmits the observed value to the controller, thereby compensating the torque current and improving the system response speed, but this method has strong influence on the system parameters. depend on
However, if the load observer is combined with sliding mode control, the response speed and immunity of the system can be improved, but the observer has the problem of slow response speed.

Method used

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  • Method for improving control performance of permanent magnet synchronous motor
  • Method for improving control performance of permanent magnet synchronous motor
  • Method for improving control performance of permanent magnet synchronous motor

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Embodiment Construction

[0031] According to the attached Figure 1 to Figure 8 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0032] see figure 1 and figure 2 , a method for improving the control performance of a permanent magnet synchronous motor implemented by the present invention, comprising the steps of:

[0033] S1: Input the current torque current and the current mechanical speed to an improved load torque observer to obtain the compensated mechanical speed and load torque;

[0034] Among them, the expression of the improved load torque observer includes:

[0035]

[0036]

[0037]

[0038]

[0039] Among them, ω m Indicates the mechanical speed, T l Indicates the load torque, J indicates the moment of inertia, b indicates the damping coefficient, T e Represents the electromagnetic torque; α, β represent the desired poles.

[0040] In this...

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Abstract

The invention provides a method for improving the control performance of a permanent magnet synchronous motor. The method comprises the steps that S1, a current torque current and a current mechanicalrotation speed are input to an improved load torque observer to obtain a compensated mechanical rotation speed and load torque; and S2, the compensated mechanical rotation speed and the load torque are input into an improved integral synovial controller to compensate the torque current to obtain the compensated torque current. The method for improving the control performance of the permanent magnet synchronous motor can save system cost, increase system stability, improve system response speed and anti-disturbance, and reduce system chattering.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a method for improving the control performance of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of small size and high power density, so it is widely used. Permanent magnet synchronous motor is of great significance to the field of high-speed and high-precision motion control. Although the conventional PID control has a good control effect in the linear control, the permanent magnet synchronous motor is a strongly coupled and nonlinear system, so it is difficult to meet the control requirements of the servo system. At present, domestic and foreign scholars have proposed many intelligent control methods to improve the control performance of PMSM. Among them, the observer method, fuzzy control, adaptive control, and sliding mode control have achieved good control effects, but there is still room for fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/001
Inventor 李容爽谢源金鹏飞黄文君宋文静
Owner SHANGHAI DIANJI UNIV
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