Non-impact starting apparatus and starting method for winding type rotor brushless double-fed motor

A starting device and winding type technology, which is applied in the control of electromechanical transmission, electronic reversing motor control, motor generator control, etc., can solve problems such as complex operation process, operation failure, and site space occupation, and achieve safe and reliable operation. , strong adaptability and simple structure

Inactive Publication Date: 2016-12-07
北京国电四维清洁能源技术有限公司
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Problems solved by technology

This kind of method will still bring the impact of several times the rated current when cutting into the power winding power supply, and the motor speed will change drastically, which is extremely unfavorable to the load operation
[0004] At present, the brushless doubly-fed motor starting device in the prior art cannot reduce the damage caused by the inrush current to the motor, and the operation process is complicated, and it is prone to operation failure, resulting in operation failure; and it needs to add supporting components such as short-circuit resistors, which increases the cost ; And the volume is generally large, occupying too much space on site, which brings inconvenience to installation, construction and maintenance

Method used

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  • Non-impact starting apparatus and starting method for winding type rotor brushless double-fed motor
  • Non-impact starting apparatus and starting method for winding type rotor brushless double-fed motor
  • Non-impact starting apparatus and starting method for winding type rotor brushless double-fed motor

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Embodiment Construction

[0043] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0044] figure 1 It is a structural schematic diagram of a wound rotor brushless doubly-fed motor shock-free starting device in an embodiment, including a contactor K1, which is used to switch the power supply of the power winding. The power supply I of the power winding side can be 380V, 690V, 1140V, One of the 6kV and 10kV three-phase power frequency AC power supplies; it also includes a contactor K2, which is used for switching on and off the power supply of the non-i...

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Abstract

The invention discloses a non-impact starting apparatus and starting method for a winding type rotor brushless double-fed motor. Current of a power winding and a control winding in the whole starting process of the brushless double-fed motor can be completely controlled, so that the starting current of the power winding and the control winding are greatly lowered, and the non-impact starting of the brushless double-fed motor is realized fundamentally. The non-impact starting apparatus is simple in structure, low in failure rate, safe and reliable in operation, and capable of monitoring the starting state of the brushless double-fed motor in real time and avoiding damage to the brushless double-fed motor by the impact current in the starting process; and in addition, the non-impact starting method is high in adaptability, and can be applied to brushless double-fed motors of various models.

Description

technical field [0001] The invention relates to the technical field of brushless double-fed motors, in particular to a non-shock starting device and starting method for a wound rotor brushless double-fed motor. Background technique [0002] Brushless doubly-fed motor is a new type of AC speed-regulating motor in recent years. It consists of two sets of independent stator windings (power winding and control winding) and rotor. It uses a reversible frequency converter to adjust the power supply frequency of the control winding to realize the control of the motor. speed control. The traditional high-power brushless doubly-fed motor starting device adopts the method of controlling the series resistance of the winding or the series resistance of the drive circuit inside the frequency converter, and the low-power brushless doubly-fed motor adopts the method of directly shorting the control winding. In these traditional methods, the peak current of the motor is very large, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/34H02P21/22
Inventor 樊军李明才吴限富王勇
Owner 北京国电四维清洁能源技术有限公司
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