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Power converter for switch reluctance starter/generator

A technology of generator power and switched reluctance, applied in the direction of controlling generators, electrical components, control systems, etc., can solve the problems of low utilization rate of power tubes and unusable tubes, and achieve the effect of fault-tolerant operation.

Inactive Publication Date: 2009-11-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The converter structure and control strategy are relatively simple, but the cost of abandoning the faulty bridge arm after a fault is that the utilization rate of the power tube is too low, and the normal working tubes in the faulty bridge arm cannot be used.

Method used

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  • Power converter for switch reluctance starter/generator
  • Power converter for switch reluctance starter/generator
  • Power converter for switch reluctance starter/generator

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Experimental program
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Embodiment Construction

[0031] Power converter faults mainly include: (1) power switch tube open circuit fault; (2) power switch tube breakdown short circuit fault.

[0032] Due to overvoltage, overcurrent and high operating temperature, the power switch tube and power diode are damaged, resulting in open circuit or power device breakdown and short circuit. At this time, the excitation power supply voltage will continue to supply power to the phase winding, and the magnitude of the current mainly depends on the magnitude of the excitation power supply voltage. After the controller judges the fault and cuts off the driving signal, the motor will run in the phase-opening power generation mode, so both of these two faults can be transformed into phase-opening faults. Using MATLAB to simulate the result is similar to the winding open circuit fault. Since the motor is working in the phase-opening power generation mode, the output voltage starts to drop at this time, but after adjusting the output power o...

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Abstract

The invention discloses a power converter for a switch reluctance starter / generator, and belongs to the technical field of fault tolerant control of switch reluctance generators and design of power converters. The power converter adopts a power converter topology, and effectively combines a switching tube and a load switching tube of each bridge arm by adding six auxiliary switching tubes S1-S6 in the conventional asymmetrical semi-bridge power converter topology of the self-excitation mode so as to realize redundancy when any switching tube of each bridge arm fails; and the switching tube has high utilization rate and strong reliability. Aiming at different fault modes, the power converter can be applied to various different control strategies, realizes fault tolerant operation, greatly improves the generating property and reliability of a generating system, and is quite applicable to fault tolerant control for the switch reluctance starter / generator.

Description

technical field [0001] The invention relates to a switched reluctance starter / generator power converter, belonging to the technical field of fault-tolerant control of switched reluctance generators and power converter design. Background technique [0002] Switched reluctance motor (referred to as SR motor) is a new type of speed-adjustable motor developed by combining power electronics technology, control technology and computer technology with traditional reluctance motor. With its superior characteristics such as flexibility, high operating efficiency, and strong fault tolerance, it has been applied in various fields such as traction transportation, general industry, aviation industry, and household appliances. As long as the on-off angle of the main switch is controlled according to the rotor position to change the magnitude and generation position of the phase current, electromagnetic torques of different magnitudes and directions can be generated. The two-way flow of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00
Inventor 蔡骏邓智泉刘泽远姚瑱毛宇阳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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