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Flux weakening control method for permanent magnet synchronous motor, flux weakening control device, flux weakening control system and vehicle

A technology of permanent magnet synchronous motor and field weakening control, which is applied in the direction of control system, motor control, vector control system, etc., can solve the problems of unstable operation of permanent magnet synchronous motor, and achieve the effect of improving stability

Active Publication Date: 2017-06-27
BEIQI FOTON MOTOR CO LTD
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a field weakening control method, device and system for a permanent magnet synchronous motor and an automobile, to at least solve the problem of unstable operation of the permanent magnet synchronous motor due to the execution of the field weakening control of the permanent magnet synchronous motor

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  • Flux weakening control method for permanent magnet synchronous motor, flux weakening control device, flux weakening control system and vehicle
  • Flux weakening control method for permanent magnet synchronous motor, flux weakening control device, flux weakening control system and vehicle
  • Flux weakening control method for permanent magnet synchronous motor, flux weakening control device, flux weakening control system and vehicle

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[0024]It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0026] It should be noted that the terms "first" and "second" in t...

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Abstract

The invention discloses a flux weakening control method for a permanent magnet synchronous motor, a flux weakening control device, a flux weakening control system and a vehicle. The method comprises steps: a first current value and a second current value of the permanent magnet synchronous motor are acquired; the first current value is adjusted through a first current reference value to obtain a first adjustment current value, and the second current value is adjusted through a second current reference value to obtain a second adjustment current value; vector control is executed on the first adjustment current value and the second adjustment current value to obtain a first voltage value and a second voltage value; calculation is executed on the first voltage value and the second voltage value, a PWM modulation degree is obtained, flux weakening feedback is executed according to the PWM modulation degree, and a flux weakening current feedback value is obtained, wherein the flux weakening current feedback value is used for adjusting the first current reference value; and the PWM modulation degree is adjusted to the best modulation degree through the flux weakening current feedback value, wherein in the best modulation degree, the permanent magnet synchronous motor operates in the flux weakening operation region. Thus, the permanent magnet synchronous motor operation stability can be improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a field weakening control method, device and system for a permanent magnet synchronous motor and an automobile. Background technique [0002] At present, with the transformation of automobile technology and the enhancement of people's awareness of environmental protection, the development of electric vehicles is getting faster and faster. Compared with asynchronous motors, permanent magnet synchronous motors have the advantages of high power density, high efficiency, and small size. The application in the field of electric vehicles more and more widely. [0003] Since the excitation magnetomotive force of the permanent magnet synchronous motor is generated by the permanent magnet, the rotor magnetic field is constant, and it cannot perform field-weakening speed expansion by reducing the excitation current like a DC motor. Usually, it is based on the expected steady-state maximum output...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22
CPCH02P2205/01
Inventor 黄彬潘宇
Owner BEIQI FOTON MOTOR CO LTD
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