Series magnetic circuit hybrid excitation generator used for automobile

Abstract

The invention relates to a series magnetic circuit hybrid excitation generator used for an automobile. The generator comprises a front end cover, a rear end cover and a hybrid excitation rotor. A voltage stabilization controller is installed on the rear end cover; a stator assembly is fixedly installed between the front end cover and the rear end cover. The stator assembly comprises a stator ironcore and armature windings. The armature windings are uniformly embedded in a groove of the stator iron core. The hybrid excitation rotor comprises a fixed magnet yoke, a fixed rotating claw pole, anexcitation winding and an annular permanent magnet, the fixed magnet yoke is a cylindrical structure, an annular groove is arranged in the middle of the fixed magnet yoke, the excitation winding is wound in the annular groove in a circumferential direction, and the excitation winding is connected with the voltage stabilization controller. Through adjusting a magnitude and a direction of a current,the magnitude of a resultant magnetic field can be controlled, stable-voltage output is achieved, the structure is simple, and consumption of electric energy needed by excitation is reduced.

Description

technical field [0001] The invention belongs to the technical field of new engines, and in particular relates to a series magnetic circuit hybrid excitation generator for automobiles. Background technique [0002] At present, the generators used in automobiles mainly include silicon rectifier generators and permanent magnet generators. Silicon rectifier generators generate a magnetic field through the excitation current of the electric excitation winding, and only a small part of the electric energy passing through the excitation winding is converted into power generation. The magnetic energy, low utilization rate of electric energy, and large consumption of electric energy; the excitation winding of the rotor is prone to failures such as burning and disconnection, which will inevitably increase the maintenance cost of the vehicle. In addition, the silicon rectifier generator also has the following problems. In a city with heavy traffic, the vehicle cannot drive fast, and th...

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Problems solved by technology

Among them, the parallel magnetic circuit hybrid excitation generator adopts two rotors, the permanent magnet rotor and the electric excitation rotor, which are arranged side by side. Because it uses two rotors, the rotor structure is relatively complicated and the manufacturing cost is high. In addition, the two rotors are arranged side by side. Arrangement will increase the axial size of the rotor, which will increase the width of the stator, and finally increase the volume of the generator

The rotor of the claw-pole hybrid excitation generator must be pasted with magnetic steel between each pair of claw poles. The manufacturing process is relatively complicated, and the assembly precision is high. It is difficult to form a large-scale industrialization. The utilization efficiency of permanent magnets is very low. In addition, in The permanent magnets tend to fall off when rotating at high speed, so the generator is prone to failure

The permanent magnetic field and the electric excitation magnetic field are coupled to adjust the magnetic field, and the structure of the generator is relatively complicated

Both sides of the horizontal magnetic pole of the electric excitation part of the motor are air gaps with small lengths, and the processing and assembly precision requirements are very high, which obviously increases the assembly man-hours and manufacturing costs

At the same time, the horizontal magnetic pole and the vertical magnetic pole provide a path for the electric excitation flux, which requires a large magnetic conduction area, which reduces the power density of the motor

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