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Method for restraining torque ripple of permanent magnet motor based on direct torque control

A technology of direct torque control and permanent magnet motor, applied in the direction of torque ripple control, etc., can solve the problems of limited reduction of motor torque ripple and increase of manufacturing cost, and achieve the effect of increasing manufacturing cost and being easy to implement

Active Publication Date: 2011-06-08
SOUTHEAST UNIV
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Problems solved by technology

However, due to the constraints of different types of motor structures, the reduction of motor torque ripple is limited
In addition, this type of optimization design method for the motor body will not only reduce the torque ripple of the motor, but also affect the no-load back electromotive force, torque output capability, power density and other performance of the motor, and increase the manufacturing cost at the same time. In the actual industry There are certain limitations in the process of

Method used

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  • Method for restraining torque ripple of permanent magnet motor based on direct torque control
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  • Method for restraining torque ripple of permanent magnet motor based on direct torque control

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Embodiment Construction

[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0030] The present invention adopts the direct torque control strategy for the permanent magnet motor: the given electromagnetic torque is output through the PI regulator 1, and the additional harmonic torque is directly injected on the basis of the given electromagnetic torque, so that the additional harmonic torque and the positioning The fundamental wave component and high-order harmonic component in the torque are equal in amplitude and opposite in phase, and cancel each other out to suppress torque ripple. Wherein, the direct torque control strategy is a well-known technique in the art, and will not be described in detail.

[0031] The present invention does not require any current adjustment and transformation between the stator and rotor co...

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Abstract

The invention discloses a method for restraining torque ripple of a permanent magnet motor based on direct torque control. The direct torque control strategy is adopted in the permanent magnet motor, an additional harmonic torque is directly added based on a given electromagnetic torque so that amplitudes of fundamental components and higher harmonic components in the additional harmonic torque and a position torque are equal and the opposite phases of the fundamental components and the higher harmonic components are opposite and are counterbalanced so as to restrain the torque ripple. The invention is suitable for manufactured motors or purchased finished motors, and particularly permanent magnet motors with larger position torque. The invention has the advantages of low cost by only modifying the control software instead of increasing a drive control cost of the motor, and simplicity, validity and good universality.

Description

technical field [0001] The invention is a control technology for suppressing torque ripple of a permanent magnet motor by directly injecting additional harmonic torque, belongs to the technical field of motor drive and control, and is a method for suppressing torque ripple of a permanent magnet motor based on direct torque control. Background technique [0002] With the increasing development of science and technology, especially microprocessor technology, power electronics technology, high-performance permanent magnet material manufacturing technology, and the great progress made in automatic control technology, various high-performance motors with permanent magnet motors as the main actuator Drives and servo control systems have developed rapidly. However, in a permanent magnet motor, even when the motor windings are open, the motor exhibits a periodic pulsating torque, which is caused by the interaction of the varying reluctance formed by the stator and rotor cogging with...

Claims

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Application Information

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IPC IPC(8): H02P6/10
Inventor 花为贾红云程明
Owner SOUTHEAST UNIV
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