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Motor control method and motor control device

A motor control, double closed-loop control technology, applied in the direction of motor control, control system, electrical components, etc., can solve problems such as poor drive, motor shutdown, etc., to prevent voltage saturation, solve the effect of poor drive or shutdown

Active Publication Date: 2018-08-14
HANGZHOU XIANTU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the embodiment of the present application provides a motor control method and device, which can solve the problems of poor drive and motor shutdown caused by the voltage saturation state in the prior art

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  • Motor control method and motor control device

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Embodiment Construction

[0047] 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 a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0048] In order to facilitate the understanding of the solution of this application, a specific application scenario of this application is firstly introduced.

[0049] The motor control method and device provided in the embodiments of the present application are applied to a double closed-loop control system, such as figure 1 As shown, the system includes: a spee...

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Abstract

The embodiment of the invention discloses a motor control method and a motor control device, which are applied to a dual closed-loop control system. The method comprises the following steps: acquiringa d shaft voltage instruction and a q shaft voltage instruction output by a current loop; according to the d shaft voltage instruction, the q shaft voltage instruction and power voltage of a motor, determining voltage saturation rate; judging whether the voltage saturation rate is greater than a preset saturation threshold value; and if so, amending the d shaft voltage instruction and the q shaftvoltage instruction, or amending a three-phase voltage instruction output to the motor. With the method and the device provided by the invention, output voltage can be quickly enabled to effectivelyact in a voltage limit circle, occurrence of voltage saturation is prevented effectively and quickly, thus, problems, such as bad driving or stop, caused by voltage saturation ca be solved, and the motor can keep a running state when the voltage jumps or the motor is in full power operation.

Description

technical field [0001] The present application relates to the technical field of motor control, in particular to a motor control method and device. Background technique [0002] During control of the motor with a sine wave, the supply voltage is fixed. However, as the speed of the motor increases or the load increases, the power of the motor increases gradually, and the phase voltage of the motor increases. When the phase voltage of the motor increases to exceed the supply voltage, the voltage saturation state is reached. In addition, when the power grid fluctuates and causes the power supply voltage to drop instantaneously, the phase voltage of the motor will also exceed the power supply voltage, reaching a state of voltage saturation. In the voltage saturation state, the waveform of the phase voltage will be distorted, which will easily cause poor driving and cause the motor to stop. Contents of the invention [0003] In view of this, the embodiments of the present ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/024H02P29/028
CPCH02P29/0241H02P29/032
Inventor 赵鸣
Owner HANGZHOU XIANTU ELECTRONICS
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