A variable winding starter generator for automobiles

Abstract

The present invention proposes a variable winding starter generator, which includes rotor core, stator core, coil, shaft and casing, etc., and is characterized in that each stator pole has a centralized coil with one m-turn and one n-turn; when the When the variable-winding starter-generator used for automobiles is used as a starter, the switch connects all the coils on the stator poles with the same phase in series to form a phase armature winding, and each phase armature winding is connected to an asymmetrical half-bridge with a body diode After the converter, it can run electrically in the switched reluctance motor mode; when the automobile variable winding starter generator is used as a generator, the n-turn coils on all stator poles are connected in series to form an excitation winding, and the stator poles with the same phase The m-turn coils on the upper part are connected in series or in parallel to form a phase armature winding, and the starter generator operates in the mode of electric excitation double salient pole generator to generate electricity. The starter generator of the invention can effectively utilize the advantage of relatively high efficiency of the switched reluctance motor, and also effectively utilize the advantages of simple voltage regulation and control of the electrically excited double salient pole generator.

Description

technical field [0001] The invention relates to a variable winding starter generator for automobiles, belonging to the technical field of automobile motors and electrical appliances. Background technique [0002] The starter generator can not only be used as a motor to start the engine, but also can be used as a generator to supply power to electrical equipment. It is a key component of new energy-saving vehicles such as hybrid vehicles and idle stop vehicles. With the development of automobile technology, starter generator technology is more and more used in automobiles. [0003] But Darwin pointed out: survival of the fittest. Only starter generators that are suitable for both the starting environment and the power generation environment are competitive. Taking a traditional gasoline engine as an example, the starting speed of the engine is about 200r / min, and the idle speed of the engine after starting is about 700r / min, and the normal speed after starting is above 1500...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defect that current starter generators cannot have high performance in both low-speed starting and high-speed power generation states, the present invention proposes a variable-winding starter generator for automobiles.

[0009] Another object of the present invention is to solve the problem that the magnetic flux amplitude of each phase of the traditional electric excitation generator is difficult to be equal by configuring the excitation winding on each stator pole

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