Multi-level switch reluctance motor hybrid power driving system and control method thereof

Abstract

The invention discloses a multi-level switch reluctance motor hybrid power driving system and a control method thereof. The system comprises a switch reluctance motor, a generator control module, a modular full-bridge inverter and a modular multi-level converter, wherein the generator control module is used for outputting direct current voltage and providing electric energy for the switch reluctance motor system; the modular full-bridge inverter is used for controlling voltage of a switch reluctance motor winding; and the modular multi-level converter is used for providing electric energy forthe switch reluctance motor, realizing variable voltage control of the motor winding, and absorbing demagnetized current of the motor winding. According to the system and the method, the variable voltage control of the motor winding can be realized; excitation and demagnetization speeds of the switch reluctance motor winding are increased; an output torque of the motor is increased; battery pack failure removal and battery balance charging functions are realized; a failure rate of the system is reduced; and the operation reliability of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and more specifically relates to a multilevel switched reluctance motor hybrid drive system and a control method thereof. Background technique [0002] With the continuous development of human civilization, it has become the consensus of all mankind to make full use of renewable clean energy, protect the environment, save energy and reduce emissions. Electric vehicles and hybrid vehicles use electric energy as the driving energy. However, on the one hand, the battery life of electric vehicles is not as good as that of traditional internal combustion engine vehicles, and electric vehicles using permanent magnet motors need to use rare earths, an important strategic material, which increases the cost of motors. At the same time, a large amount of rare earth mining will cause serious resource and environmental problems; on the other hand, the demagnetization of permanent magnets also causes a decreas...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a multi-level switched reluctance motor hybrid drive system and its control method, aiming at solving the problem that the existing hybrid electric vehicle drive system can only The output DC voltage is not conducive to the excitation and demagnetization of the motor, causing the problem of low system efficiency

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