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Starting structure, starting method and starting device for brushless double-feed motor

A technology of starting device and motor, applied in the direction of starting device, etc., can solve the problems of high cost, many supporting equipment for motors, and excessive starting current.

Inactive Publication Date: 2016-04-06
EAST GRP CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to avoid the deficiencies in the prior art and provide a start-up structure and start-up method of a brushless doubly-fed motor. The start-up structure cooperates with the start-up method to not only solve the problem of excessive start-up current, but also solve the The problem of many motor supporting equipment and high cost

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  • Starting structure, starting method and starting device for brushless double-feed motor

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Embodiment Construction

[0025] The present invention is further described in conjunction with the following examples.

[0026] A starting structure of a brushless doubly-fed motor in this embodiment belongs to an asynchronous starting structure, such as figure 1 As shown, it includes a frequency converter, and the frequency converter includes a first contactor KM1, a soft-start resistor R, a soft-start second contactor KM2, an input reactor L and a three-phase full-bridge uncontrolled rectifier circuit VR connected to the rectifier circuit The bus capacitor C at the output end of the bus capacitor C, the three-phase full-bridge inverter circuit VI connected to the output end of the bus capacitor C, the output end of the three-phase full-bridge inverter circuit VI is connected to the control winding P of the brushless doubly-fed motor C .

[0027] The three-phase AC power supply is sequentially connected to the first contactor KM1, the second soft-start contactor KM2, the input reactor L and the thr...

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Abstract

The invention provides a starting structure and a starting method for a brushless double-feed motor, and relates to the technical field of brushless double-feed motors. The starting structure comprises a converter, wherein output of the converter is connected with a control winding P<c> of the brushless double-feed motor; and a power winding P of the brushless double-feed motor is connected to a fundamental frequency power supply through a third switch KM3. According to the starting structure, by a PWM (pulse width modulation) converter, a short circuit device for shorting the power winding P is connected with the power winding and is matched with software control, so that the converter provided by the invention reduces a starting current without a brake circuit or a frequency-sensitive rheostat (or an adjustable resistor), and shorts the control winding P<c> without a starting resistor; only one short circuit device needs to add in hardware structure; low-current and low-cost soft starting of the brushless double-feed motor can be achieved by matching the starting method; the starting structure of the brushless double-feed motor is simple in structure; and the equipment volume can be reduced.

Description

technical field [0001] The present invention relates to the technical field of brushless doubly-fed motors, in particular to a start-up structure and a start-up method of a brushless doubly-fed motor. The method is completed by establishing a functional module framework and controlling a computer system by a computer program. These computer program instructions are stored in on a computer-readable storage medium. Background technique [0002] Brushless double-fed motor is a new type of motor. The brushless double-fed motor evolved from the cascaded motor, through two sets of stator windings (respectively power winding P p and control winding P C ) and a specially designed rotor to achieve a brushless structure; through the control winding P C The variable voltage and frequency conversion control realizes the variable speed and constant frequency power generation of the brushless doubly-fed motor or the electric operation of variable frequency speed regulation. When runni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/21
Inventor 王雪帆徐海波韦忠朝
Owner EAST GRP CO LTD
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