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High-power brushless double fed motor variable frequency speed regulation system and control method

A frequency conversion speed regulation and electric motor technology, which is applied in the direction of single motor speed/torque control, AC motor control, control system, etc., can solve the problem that the motor cannot realize full speed regulation, and achieve high reliability, high system reliability, Maintain Simple Effects

Active Publication Date: 2013-06-05
BEIJING SWORD ELECTRIC IND
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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-power brushless double-fed motor frequency conversion speed regulation system to solve the technical problem that the low-power excitation controller cannot control the high-voltage high-power brushless double-fed motor to achieve full-range speed regulation

Method used

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  • High-power brushless double fed motor variable frequency speed regulation system and control method
  • High-power brushless double fed motor variable frequency speed regulation system and control method
  • High-power brushless double fed motor variable frequency speed regulation system and control method

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Embodiment 1

[0047] Embodiment 1 is suitable for the speed regulation control of high-power brushless double-fed motors above 1000kw, and embodiment 2 is suitable for the speed regulation control of high-power brushless double-fed motors between 300kw-1000kw, and the control power is only 30% of the maximum power of the motor. Low cost has strong economic feasibility.

[0048] Such as image 3 As shown, the third embodiment includes an excitation controller 8, an inverter unit 10, a first current detection unit 2, a second current detection unit 7, a voltage detection unit 13, an energy storage capacitor 11, a PWM rectification unit 21, and a BOOST reactance 22, soft start circuit 14, input switch 12, low-voltage grid power distribution unit 18, transformer 19, high-voltage grid power distribution unit 20, first contactor 1 and operation and display unit 9. Among them, the excitation controller 8, the inverter unit 10, the first current detection unit 2, the second current detection unit ...

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Abstract

A high-power brushless double fed motor variable frequency speed regulation system comprises a power winding of the high-power brushless double fed motor and a control winding, a first contactor, an input power distribution unit, an entry switch, a soft start circuit, a alternating current or direct current rectifying unit, a energy-storage capacitor, an operation and display unit, and an excitation control and inverter module which is composed of a excitation controller, an inverter unit, a first current detection unit, a second current detection unit and a voltage detection unit. After the power winding is connected with the first contactor in series, the power winding is connected with the input power distribution unit, the entry switch, the alternating current or direct current rectifying unit, the energy-storage capacitor, and the inverter module, then the power winding is connected with the control winding. The soft start circuit is connected with a circuit between the alternating current or direct current rectifying unit and a three-phase output end of the entry switch in series or the soft start circuit is connected with a circuit between the alternating current or direct current rectifying unit and the energy-storage capacitor. Whole course frequency speed regulation of the brushless double fed motor can be achieved. The invention further comprises a fundamental control timing sequence and a method.

Description

technical field [0001] The invention relates to a control system and a control method, in particular to a control system and a control method for a high-power brushless double-fed motor. Background technique [0002] At present, the research on the design of brushless double-fed motor and its control system has been carried out for decades, but due to the complex model of the brushless double-fed motor system, there is no ready-made control algorithm and control system, especially for high-power brushless double-fed For electric motors, the high-voltage frequency converter used is high in cost, large in size, large in rated capacity, serious in energy consumption, complex in control system structure, difficult in operation and maintenance, and lacks efficient control sequences and methods. These problems have seriously hindered its promotion. application, so there is no report of industrialization in the world so far. Contents of the invention [0003] The purpose of the ...

Claims

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Application Information

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IPC IPC(8): H02P25/18H02P27/06H02P6/08H02P6/30
Inventor 刘宏鑫向守兵马文武谭应朝杜战波赵雅茹
Owner BEIJING SWORD ELECTRIC IND
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