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A method and device for suppressing torque ripple of a permanent magnet brushless DC motor

A permanent magnet brushless DC, motor torque technology, applied in the direction of torque ripple control, current controller, etc., can solve problems such as commutation sparks

Inactive Publication Date: 2019-10-11
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional DC motor has many advantages such as good speed regulation performance and high operating efficiency, but due to the existence of mechanical brushes and commutators, it brings a series of problems such as commutation sparks

Method used

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  • A method and device for suppressing torque ripple of a permanent magnet brushless DC motor
  • A method and device for suppressing torque ripple of a permanent magnet brushless DC motor
  • A method and device for suppressing torque ripple of a permanent magnet brushless DC motor

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Embodiment Construction

[0049] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0050] The applicant found through research that there are two main reasons for the electromagnetic torque ripple of the permanent magnet brushless DC motor:

[0051] On the one hand, the torque ripple is caused by the unreasonable mechanical design of the motor and the unsatisfactory magnetization of the rotor magnetic steel. The torqu...

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Abstract

The invention relates to a device and a method for torque ripple restraining of a permanent magnet brushless direct-current motor. The method includes: determining rotating speed operating modes of the motor; when the motor is in a low-speed operating mode during phase changing, reducing rise current in non-commutative windings under different states; when the motor is in a high-speed operating mode during phase changing, compensating drop current in the non-commutative windings under different states. The method has advantages that non-commutative torque ripple of the permanent magnet brushless direct-current motor in low-speed and high-speed operating modes can be restrained effectively to improve control precision and system stability of the permanent magnet brushless direct-current motor, operating efficiency of the motor is improved, and application range and application places of the permanent magnet brushless direct-current motor are expanded.

Description

technical field [0001] The present application relates to the technical field of electromechanical control, in particular to a method and device for suppressing torque ripple of a permanent magnet brushless DC motor. Background technique [0002] A permanent magnet brushless DC motor (Brushless DC machine, BLDCM) is a permanent magnet synchronous motor in which the induced potential waveform of the stator winding is a trapezoidal wave. The traditional DC motor has many advantages such as good speed regulation performance and high operating efficiency, but due to the existence of mechanical brushes and commutators, it brings a series of problems such as commutation sparks. The permanent magnet brushless DC motor makes up for the shortcomings of the traditional DC motor well. The permanent magnet brushless DC motor retains the excellent speed regulation performance of the traditional DC motor, and saves the mechanical brush and commutator, so the permanent magnet Brushless DC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P6/28
Inventor 孔全存温杰超刘桂礼骆荣坤冯金磊
Owner BEIJING INFORMATION SCI & TECH UNIV
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