Small power three-phase AC switched reluctance generator/motor converter

Abstract

A small-power three-phase AC switched reluctance power generator / motor converter comprises three phase winding conversion branches, a reversible bridge-type conversion circuit and an electrolytic capacitor, wherein each three phase winding conversion branch is connected in parallel and then is rectified to output by the reversible bridge-type conversion circuit, the output is used as a resonant capacitor in the phase winding conversion branch during operation of a power generator to provide excitation, the output also can be inversed by the reversible bridge-type conversion circuit for supplying power to each phase winding to run a motor, and alternating current can be given out or utilized to work. The whole converter system runs in a plurality of quadrants, is high in controllability and flexibility and is suitably used a small-size switched reluctance machine integrated utilization system under the condition of no power grid.

Description

technical field [0001] The present invention relates to the field of switched reluctance motor systems, in particular to an integrated converter system of an AC-type switched reluctance generator using resonance means to self-enhance excitation and an AC-DC hybrid switched reluctance motor adapting to motor operating conditions and its control method. Background technique [0002] The switched reluctance motor has a simple and firm structure, no winding and no permanent magnet on the rotor, low cost, and has broad application prospects. [0003] For a long time, the converters of switched reluctance motors can only be adapted to the working conditions of switched reluctance generators, or can only be adapted to the operating conditions of switched reluctance motors. There are very few precedents of free switching operation, and in some applications, such as outdoor electricity applications, it is urgent to rely on diesel engines to drive generators to generate electricity, ...

AI Technical Summary

Problems solved by technology

[0005] At present, for the excitation phase of the switched reluctance generator, because it is hoped that the excitation phase time is as short as possible and the excitation current is as large as possible, so as to create conditions for a wider power generation phase and a larger power generation current, thereby improving the power generation output capacity, so There are many measures to strengthen excitation in the industry, such as the introduction of Z converters, buck-boost chopper circuits, etc., but these increase the complexity of the circuit, and there must be controllable switches inside, which also increases the complexity of the control system degree; a simple structure, an excitation circuit that can strengthen the excitation with as little control as possible is required

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