Winding open-circuit type permanent magnet motor vehicle starting and generating system and control method

Abstract

The invention discloses a winding open-circuit type permanent magnet motor vehicle starting and generating system and a control method. The system comprises a winding open-circuit type permanent magnet motor, a three-phase rectifier bridge, a three-phase bridge converter, a changeover switch, a filter capacitor, a storage battery, a controller, a voltage and current test circuit, a drive circuit and a load. In the method, one side of the winding head of the winding open-circuit type permanent magnet motor forms a rectifying side to supply power to the load through the three-phase rectifier bridge and the filter capacitor, and the other side is connected with the three-phase bridge converter and the storage battery to form an inversion control side. The changeover between the starting operation state and the generating operation state is realized through the changeover switch, starting control adopts single-current closed loop vector control, generating operation adopts rectifying side DC voltage and motor-phase current double closed loop control, and stable output voltage and generator high-efficiency operation control are realized. The winding open-circuit type permanent magnet motor starting and generating system can effectively meet the requirements of wide revolution operating range, high power density and high efficiency of a vehicle starting generator.

Description

technical field [0001] The invention relates to a vehicle-mounted starting and generating system and a control method for an open-winding type permanent magnet motor, belonging to the field of motor control. Background technique [0002] Since the 1990s, with the increasingly serious energy crisis and environmental protection problems, the voices of countries all over the world to improve environmental protection have been increasing, and the traditional fuel vehicles have put forward higher and higher requirements for reducing exhaust pollution and saving energy. The global automobile industry is facing severe challenges, and the traditional automobile industry has also begun to undergo structural transformation—combining new energy with the automobile industry, realizing the new energy of automobile power systems, eliminating the constraints of traditional energy and environmental problems on the automobile industry, and achieving low-level development. carbon economy. Ne...

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Problems solved by technology

Since the grid connection process requires the output frequency of the generator to be strictly synchronized with the grid frequency, the output speed of the prime mover of the system is strictly limited, which limits the scope of application of the system, and the independent operation characteristics of this type of open-winding generator have not been analyzed. Especially as a generator, how to realize voltage regulation control when the speed changes

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