Method and system for lowering torque pulsation of switched reluctance motor by current adaptive control

A switched reluctance motor, adaptive control technology, applied in the control system, AC motor control, observer control, etc., can solve the problem of strong switched reluctance motor, impractical application, torque ripple, etc.

Inactive Publication Date: 2017-01-25
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, due to the extremely strong nonlinear characteristics of switched reluctance motors, the above-mentioned existing motor torque control methods based on simplified mathematical models are prone to severe torque ripple and cannot be practically applied.

Method used

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  • Method and system for lowering torque pulsation of switched reluctance motor by current adaptive control
  • Method and system for lowering torque pulsation of switched reluctance motor by current adaptive control
  • Method and system for lowering torque pulsation of switched reluctance motor by current adaptive control

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Embodiment Construction

[0078] Embodiment of method for reducing torque ripple of switched reluctance motor by current adaptive control

[0079] The embodiment of the method for reducing the torque ripple of the switched reluctance motor by current adaptive control, the main steps are as follows:

[0080] Ⅰ. Torque deviation preprocessing

[0081] In this example, the non-linear function is introduced to preprocess the torque deviation as follows:

[0082] f a l ( Δ T ) = | Δ T | α s i g n ( Δ T ) , | ...

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Abstract

The invention relates to a method and system for lowering torque pulsation of a switched reluctance motor by current adaptive control; the method comprises: preprocessing a deviation: subjecting the torque deviation to nonlinear conversion; solving torque estimated output and adaptive PID (proportion integration differentiation) control coefficient by using double-weight neural network; acquiring current set total current by PID control calculation, and acquiring each phase control current via current allocation; predicting current feed-forward compensation control by finite difference extended Kalman filter, and effectively inhibiting and lowering torque pulsation of the switched reluctance motor by joint action of adaptive PID control and prediction-based current feed-forward compensation control. Current, torque and rotor position sensors are connected with a signal processor, the signal processor executes modules of the method, compensated three-phase reference current is output to control a power converter of the motor via a current hysteresis controller, and torque pulsation of the switched reluctance motor is significantly and effective inhibited.

Description

technical field [0001] The invention relates to the field of motor power drive of an electric vehicle, in particular to a method and a system for reducing torque ripple of a switched reluctance motor by current self-adaptive control. Background technique [0002] A switched reluctance motor (SRM for short) has neither windings nor permanent magnets, and has many advantages such as simple structure, high efficiency, stable and reliable operation, low cost, and easy maintenance. However, the switched reluctance motor has a special double-salient pole structure, adopts a switch-type power supply mode, and its electromagnetic characteristics are highly nonlinear and strongly coupled, resulting in a large torque ripple during operation, and the noise caused by the torque ripple The problem of vibration and vibration seriously restricts its application and development, so the research method of reducing the torque ripple of switched reluctance motor has extremely important signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/098H02P23/12H02P23/00
CPCH02P23/12H02P23/0004H02P23/0018
Inventor 党选举苗茂宇李珊伍锡如姜辉张向文李帅帅张明王涵正朱国魂陈童
Owner GUILIN UNIV OF ELECTRONIC TECH
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