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Method and device for field weakening control of DC motor

A technology of DC motor and field weakening control, which is applied in the direction of motor generator control, control of electromechanical transmission, electronic commutation motor control, etc. It can solve the problem that the motor cannot meet the driving power demand, and achieve the effect of fast response speed.

Active Publication Date: 2020-01-31
HANGZHOU XIANTU ELECTRONICS
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  • 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 DC motor field weakening control method and device, which can solve the problem in the prior art that the motor cannot meet the driving power demand when the motor enters a voltage saturation state

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  • Method and device for field weakening control of DC motor
  • Method and device for field weakening control of DC motor
  • Method and device for field weakening control of DC motor

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Embodiment Construction

[0040] 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.

[0041] In order to solve the problem that the power demand of the motor drive cannot be met in the state of voltage saturation, and improve the output torque and efficiency of the motor, the embodiment of the present application provides a DC motor field weakening control method and device. When performing field weakening control, The lead angle is adjusted based o...

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Abstract

Embodiments of the invention disclose a direct current motor weak magnetic control method and apparatus. The direct current motor weak magnetic control method comprises the steps of judging whether toperform weak magnetic control or not according to a voltage saturation rate output to a direct current motor; if so, controlling an advance angle to be enlarged or diminished according to the voltagesaturation rate output to the direct current motor and a first threshold value every an interval of a preset period, wherein the enlarged angle of the advance angle in each time is larger than the diminished angle in each time, so that the advance angle can be enlarged as soon as possible to avoid influence of the voltage saturation state to the normal operation of the motor, the advance angle isreduced at a relatively low speed to enable the voltage protection rate to be stabilized to be close to the first threshold value as soon as possible, the voltage saturation rate can be stabilized tobe close to the weak magnetic set saturation rate in a stable condition of the system, and the advance phase angle can tend to be stabilized in a weak magnetic critical state.

Description

technical field [0001] The present application relates to the technical field of motor control, in particular to a method and device for field weakening control of a DC motor. Background technique [0002] In the sine wave drive of the brushless DC motor, when the power supply voltage is fixed, as the motor speed increases or coincides with the increase, the motor power gradually increases. When the phase voltage increases to exceed the power supply voltage, that is, the voltage saturation state is reached, and the phase voltage waveform will be distorted, which will easily cause poor driving and cause shutdown. At this time, it is necessary to perform field weakening control in advance, increase the phase current, keep the phase voltage within the power supply voltage, and continue to increase the power to meet the driving demand. Contents of the invention [0003] In view of this, the embodiments of the present application provide a method and device for field weakening...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00
CPCH02P21/0089
Inventor 赵鸣
Owner HANGZHOU XIANTU ELECTRONICS
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