Method and device for controlling weak magnetism of permanent magnet synchronous motor

A permanent magnet synchronous motor and field-weakening control technology, which is applied in the direction of motor generator control, AC motor control, electromechanical transmission control, etc., can solve the problems of unstable motor torque and poor robustness, and achieve stable and effective operation. good effect

Inactive Publication Date: 2012-03-21
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology

And the given value i of the d-axis current obtained above sd * and the given value i of the q-axis current sq * The way of the motor has no direct relationship with the torque of

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  • Method and device for controlling weak magnetism of permanent magnet synchronous motor
  • Method and device for controlling weak magnetism of permanent magnet synchronous motor
  • Method and device for controlling weak magnetism of permanent magnet synchronous motor

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0046] figure 2 The flow chart of the field weakening control method for the permanent magnet synchronous motor provided by the embodiment of the present invention, as shown in figure 2 As shown, the method includes:

[0047] Step 201: Detect the two-phase stator current i of the permanent magnet synchronous motor a i b , and calculate ...

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Abstract

The invention discloses a method and a device for controlling weak magnetism of a permanent magnet synchronous motor. The method comprises the steps: reducing the counter potential of the permanent magnet synchronous motor through regulating the set value of d-axis current and the set value of q-axis current under an equivalent rotor coordinate system, wherein the set value of the d-axis current and the set value of the q-axis current are obtained through the following methods: comparing an actual angular speed signal of a rotor with a preset angular speed signal, and performing proportional integral (PI) regulation on a comparison signal to obtain the set toque of the rotor; obtaining the initial set value of the d-axis current according to the set torque; obtaining the regulated value of the d-axis current according to the actual angular speed signal, an output voltage signal and the maximum set voltage value of a traction inverter; obtaining the set value of the d-axis current according to the initial set value of the d-axis current and the regulated value of the d-axis current; and then, obtaining the set value of the q-axis current according to the set torque and the set value of the d-axis current.

Description

technical field [0001] The invention relates to permanent magnet synchronous motor technology, in particular to a field weakening control method and device for permanent magnet synchronous motors. Background technique [0002] In recent years, with the rapid development of power electronics technology, microelectronics technology, new motor control theory and rare earth permanent magnet materials, permanent magnet synchronous motors have been rapidly popularized and applied. The permanent magnet synchronous motor has the advantages of small size, low loss and high efficiency. Today, when energy saving and environmental protection are paid more and more attention, it is very necessary to study it. [0003] The vector control technology of the permanent magnet synchronous motor can make the permanent magnet synchronous motor obtain good transient response characteristics, and realize fast response to load disturbance and change of given value, so it has been widely used. The ...

Claims

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Application Information

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IPC IPC(8): H02P6/06H02P21/00H02P27/06
Inventor 陈振锋梁培志孙建平刘荣强李竹可
Owner CRRC YONGJI ELECTRIC CO LTD
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