Brushless doubly-fed motor control method, device and system

A technology of a doubly-fed motor and a control method, which is applied in the control system, vector control system, motor-generator control and other directions, can solve problems such as low reliability, and achieve the effect of high reliability and reduced loss

Active Publication Date: 2018-07-31
EAST GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a brushless doubly-fed motor control method, device and system for the problem of low reliability of the traditional brushless doubly-fed motor control device

Method used

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  • Brushless doubly-fed motor control method, device and system
  • Brushless doubly-fed motor control method, device and system
  • Brushless doubly-fed motor control method, device and system

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Embodiment Construction

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] see figure 1 , a brushless doubly-fed motor control method, comprising the following steps:

[0033] Step S300, receiving a starting command, and calculating the output of the inverter combination system according to the measured parameters and the preset rotational speed.

[0034] The inverter combination system includes a host inverter and a slave inverter, and the host inverter and the slave inverter are respectively connected to correspondin...

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Abstract

The invention relates to a brushless doubly-fed motor control method, device and system, and is applied to a host frequency converter. The method comprises the steps that a start instruction is received, the output of the frequency converter group system is calculated according to the measurement parameter and the preset rotating speed, and the host frequency converter and the slave frequency converter are connected with the corresponding branch of the brushless doubly-fed motor control winding; the brushless doubly-fed motor is controlled to enter the corresponding operation state according to the output of the frequency converter group system; and when the fault information transmitted by the slave frequency converter is received, the corresponding fault slave frequency converter is cutoff. According to the brushless doubly-fed motor control method, device and system, the host frequency converter and the slave frequency converter are connected with the corresponding branch of the control winding, each frequency converter only requires to bear a part of the total power of the system and the host frequency converter is adopted to control the frequency converter group system and the fault slave frequency converter can be directly cut off in case of fault so as to have the advantage of high reliability in comparison with the conventional frequency converter.

Description

technical field [0001] The invention relates to the technical field of brushless doubly-fed motors, in particular to a control method, device and system for brushless doubly-fed motors. Background technique [0002] The brushless double-fed motor is a new type of motor with two sets of windings on its stator, one of which is directly connected to the power frequency grid, called the power winding, and the other is connected to the frequency converter, called the control winding. The brushless double-fed motor cancels the brushes and slip rings, and the frequency converter used only needs to bear the system slip power, and the low-voltage frequency converter can be used to control the high-voltage motor. Therefore, the brushless double-fed motor has a good application prospect in the field of frequency conversion speed regulation. [0003] The control winding of the traditional brushless doubly-fed motor is connected with a low-voltage frequency converter, and one side of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/00
Inventor 王雪帆李珍平孔铭徐海波吴文辉
Owner EAST GRP CO LTD
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