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Weak flux control method and device and motor

A field-weakening control and current technology, which is applied in the direction of controlling generators, electromechanical transmissions, and electromechanical brakes, etc., can solve the problems of limited speed-up effects of field-weakening control methods, achieve improved field-weakening effects, increase motor speed, The effect of high speed

Active Publication Date: 2019-09-10
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Problems solved by technology

[0003] In order to solve the technical problem that the speed-up effect of the field-weakening control method in the prior art is limited and it is difficult to meet the actual needs, the present invention provides a field-weakening control method, device and motor for a motor with a higher field-weakening speed-up effect

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  • Weak flux control method and device and motor
  • Weak flux control method and device and motor
  • Weak flux control method and device and motor

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Embodiment Construction

[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some embodiments of the present invention, not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

[0038] The motor field-weakening control method provided by the present invention can be used to control drive motors such as permanent magnet synchronous motors and DC brushless motors, perform field-weakening control on the motors, and increase the speed of the motors. It should be noted that, in the f...

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Abstract

The invention relates to the technical field of a driving motor, and particularly provides a weak flux control method and device and a motor. The weak flux control method comprises the steps of acquiring an output value of a q-axis voltage and a setting value of the q-axis voltage under a weak flux state; determining a compensation value of a weak flux current according to the output value and thesetting value; and compensating the weak flux current according to the compensation value. According to the control method, the weak flux effect of the motor is improved by correction and compensation on the weak flux current on the basis of an existing weak flux method, the rotational speed of the motor is further improved, the rotational speed is higher compared with existing weak flux speed rising, the driving performance of the motor is improved, and more demand scenes are met.

Description

technical field [0001] The invention relates to the technical field of drive motors, in particular to a motor field weakening control method, device and motor. Background technique [0002] With the development of the new energy vehicle industry, the number of electric vehicles is increasing rapidly. As the core component of electric vehicles, the electric vehicle motor drive control system is the fundamental guarantee for improving the driving performance, driving reliability and stability of electric vehicles. Therefore, the driving Motor is an important research direction of new energy vehicles. For the drive motor, under a certain voltage, the maximum speed (base speed) that the motor can run is difficult to meet the actual demand. Therefore, it is necessary to further increase the speed under the condition of constant power of the motor through other methods, that is, the constant power method to increase the speed. Magnetic field-weakening speed-up is a constant power...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/22
CPCH02P21/0089H02P21/22
Inventor 韩利利李立徐常升唐森
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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