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Permanent magnet synchronous motor control method and device

A technology of permanent magnet synchronous motor and control method, which is applied in the field of control and can solve the problems of low dynamic performance and low stability of permanent magnet synchronous motor

Inactive Publication Date: 2020-09-18
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a control method and device for a permanent magnet synchronous motor to solve the

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  • Permanent magnet synchronous motor control method and device
  • Permanent magnet synchronous motor control method and device
  • Permanent magnet synchronous motor control method and device

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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides a method and a device for controlling a permanent magnet synchronous motor. The method comprises the steps of acquiring a given stator current, a stator voltage at the previousmoment, a given stator voltage at the previous moment and a stator current at the previous moment of the permanent magnet synchronous motor; using a preset output voltage function of a current regulator of the permanent magnet synchronous motor; determining the current given stator voltage by combining the given stator current, the stator voltage at the previous moment, the given stator voltage atthe previous moment, the stator current at the previous moment and the motor parameters, the current regulator at least comprising a cross-coupling anti-saturation controller, and the output voltagefunction at least comprising an active damping term; and controlling the permanent magnet synchronous motor according to the current given stator voltage. By adding the cross-coupling anti-saturationcontroller and the active damping item, the speed of current tracking is increased, the delay of current tracking is reduced, and the stability and the dynamic performance of the permanent magnet synchronous motor are improved on the premise of ensuring the decoupling effect.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a control method and device for a permanent magnet synchronous motor. Background technique [0002] After the permanent magnet synchronous motor adopts vector control, there is still a dynamic coupling relationship, and with the increase of the speed, the influence of the coupling effect is also increasing. [0003] At present, the way to deal with the dynamic coupling relationship is the voltage feedforward decoupling control method, that is, the coupling item is calculated by using the feedback current and the speed, and the coupling item introduced by the rotating coordinate transformation is offset by the voltage feedforward. However, since the permanent magnet synchronous motor is running During the process, the motor parameters of the permanent magnet synchronous motor will change, and the change of the motor parameters will lead to the inaccuracy of the cross-decoupling t...

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Application Information

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IPC IPC(8): H02P21/00H02P21/22H02P25/022
CPCH02P21/0003H02P25/022H02P2207/05H02P21/22
Inventor 高乐孙楠楠陈文淼
Owner WEICHAI POWER CO LTD
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