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Active type boost converter of switch reluctance generator and control method thereof

A technology of boost converter and switched reluctance, which is applied in the direction of controlling the generator through the change of the magnetic field, adjusting the electric variable, controlling/regulating the system, etc., and can solve problems such as output torque drop and output power limitation

Active Publication Date: 2018-01-05
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

With the increase of the speed, the system needs a longer angle interval to establish the phase current or complete the freewheeling commutation. Due to the limitation of the topology of the traditional three-phase asymmetrical half-bridge power converter, the output torque of the switched reluctance motor decreases at high speed. , the output power is limited

Method used

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  • Active type boost converter of switch reluctance generator and control method thereof
  • Active type boost converter of switch reluctance generator and control method thereof
  • Active type boost converter of switch reluctance generator and control method thereof

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the example of the present invention will be further described:

[0031] like figure 1 As shown, the switched reluctance generator active boost converter topology of the present invention is to add a power flow control unit before the traditional asymmetrical half-bridge power converter; the power flow control unit includes a MOSFETT 1 , Freewheeling diode D 1 , Freewheeling diode D 2 and capacitance C d ; MOSFET T 1 source of the freewheeling diode D 1 connected to the anode of the MOSFET T 1 The drain of the freewheeling diode D 2 connected to the anode of the freewheeling diode D1 The cathode and the freewheeling diode D 2 connected to the cathode, the capacitor C d One end of the freewheeling diode D 1 and freewheeling diode D 2 Cathode, the other end is connected to capacitor C 1 and supply V e the negative pole of the capacitor C 1 One end of the freewheeling diode D 1 anode and MOSFET T 1 source, the ...

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Abstract

Provided are an active type boost converter of a switch reluctance generator and a control method thereof. A preceding-stage circuit composed of a boost capacitor, a main power switch and a power diode is added at a preceding stage of a traditional three-phase dissymmetrical half-bridge power converter, energy storage of the boost capacitor is regulated and motor excitation and demagnetizing voltage are controlled by controlling the main power switch in the preceding-stage circuit, and then a combined control strategy of a dissymmetrical half-bridge circuit and the preceding-stage circuit is proposed for controlling the power converter. By controlling the power generating power of a dissymmetrical half-bridge circuit regulating system and adjusting the energy flow in the preceding-stage converter, motor excitation and demagnetizing voltage are controlled, meanwhile output voltage ripples of the system can be effectively reduced, and the quality of electric energy is improved.

Description

technical field [0001] The invention relates to a switched reluctance generator system, in particular to an active boost converter of a switched reluctance generator and a control method thereof. Background technique [0002] The power converter is the core unit for driving the switched reluctance motor, and the development of a high-reliability and high-performance power converter is the key to popularize the application of the switched reluctance motor. With the increase of the speed, the system needs a longer angle interval to establish the phase current or complete the freewheeling commutation. Due to the limitation of the topology of the traditional three-phase asymmetrical half-bridge power converter, the output torque of the switched reluctance motor decreases at high speed. , the output power is limited. In order to overcome the problem that the current torque of the switched reluctance motor decreases with the increase of the speed, starting from the topology of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/30H02M3/158H02M1/14
Inventor 陈昊王青颜爽
Owner CHINA UNIV OF MINING & TECH
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