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A method for suppressing torque ripple of stator permanent magnet memory motor

A memory motor and torque ripple technology, applied in the field of electric transmission, can solve the problems that the research of drive control system is still in the preliminary stage

Active Publication Date: 2019-04-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the stator permanent magnet memory motor mainly focuses on the new topology and new principles, while the research on its drive control system is still in the preliminary stage.

Method used

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  • A method for suppressing torque ripple of stator permanent magnet memory motor
  • A method for suppressing torque ripple of stator permanent magnet memory motor
  • A method for suppressing torque ripple of stator permanent magnet memory motor

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Embodiment Construction

[0048] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0049] This specific embodiment discloses a method for suppressing torque ripple of a stator permanent magnet memory motor, such as figure 1 shown, including the following steps:

[0050] S1: According to the magnetization state of the permanent magnet, choose ψ pm (i f0 ), ψ pm (i f1 )……ψ pm (i f(k-1) ), ψ pm (i fk ) a total of k+1 permanent magnet flux linkages, and ψ pm (i f(j-1) )>ψ pm (i fj ), 1≤j≤k, and according to the DC bus voltage U dc , rated phase current I n , Quadrature axis inductance L at the jth magnetization state q (j) and permanent magnet flux linkage ψ pm (i fj ) to calculate the rotational speed ω ej , and then the permanent magnet flux linkage ψ pm (i f0 ), ψ pm (i f1 )……ψ pm (i f(k-1) ), ψ pm (i fk ) and the corresponding speed ω e0 , ω e1 ... ω e(k-1) , ω ek...

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Abstract

The invention discloses a stator permanent-magnet type memory motor torque ripple suppression method. The relationship between a permanent magnet linkage and the rotational speed is stored in a two-dimensional table in advance, and the permanent magnet linkage corresponding to a fixed rotational speed is obtained through table searching, thereby improving the motor speed regulation range, reducing influences of motor parameters on the permanent magnet linkage calculation accuracy. Compared with control methods employing two hysteresis controllers, a three-phase inverter is made to have a constant switch frequency through a voltage space vector method, thereby reducing torque ripples. The method overcomes problems that a system is difficult to accurately control when the system is at a low speed and high frequency noises are caused by the torque ripples.

Description

technical field [0001] The invention relates to the technical field of electric transmission, in particular to a method for suppressing torque ripple of a stator permanent magnet memory motor. Background technique [0002] The stator permanent magnet memory motor is a new type of variable flux permanent magnet motor with armature windings and alnico permanent magnets placed on the stator. Compared with the rotor permanent magnet memory motor, the rotor of this topology has neither armature winding nor permanent magnet. When the motor is running at high speed, the rotor does not need to be reinforced, which saves materials and costs. It is convenient to adjust the magnetic field control and drive control of the motor by using an additional magnetic field modulation winding. At present, the research on the stator permanent magnet memory motor mainly focuses on new topologies and new principles, while the research on its drive control system is still in the preliminary stage. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P21/00H02P21/20
CPCH02P6/10H02P21/0025
Inventor 林明耀杨公德谭广颖李念张贝贝乐伟付兴贺刘凯
Owner SOUTHEAST UNIV
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