Pawl pole of automobile generator and its manufactura

Abstract

The present invention relates to one kind of of automobile generator and its manufacture. The pawl pole has one bottom plate, one magnetic yoke on the bottom plate, six or eight insulating varnish conducting slots distributed homogeneously on the circumference of the magnetic yoke, six or eight lugs for preventing the rotation of coil, and six or eight insulated wire leading out slots in the bottom of the magnetic yoke. The manufacture of the pawl pole includes the steps of: cutting material, heating, upsetting, pre-forging, finish forging, cutting edge, magnetically annealing, cold shaping, and finishing machining. The manufacture process has low apparatus investment, low mold cost, low heating cost, high output and high product quality. The AC generator with the pawl poles of the present invention has induced electromotive force waveform of quasi-sinusoid wave and great generating power.

Description

Technical field [0001] The invention relates to a claw pole for an automobile generator and a manufacturing process thereof. Background technique [0002] Modern cars have generally adopted electrical components such as air conditioners, electric injection engines, electronically controlled doors and windows, and electrically adjustable seats, and the power consumption has risen sharply. The alternator is the key component of the car, which is responsible for the power supply of the car. The configuration of the car is different, the power consumption demand is different, the alternator is different, and the corresponding claw poles are different. The alternator is mounted next to the engine and is turned by the engine to convert mechanical energy into electrical energy. The alternator is composed of two parts, the stator winding and the rotor winding. The three-phase stator windings are distributed on the housing according to the difference of 120 degrees from each other. ...

AI Technical Summary

Problems solved by technology

[0004] 1. Precision casting: The claws produced by this process are extremely prone to defects such as shrinkage cavities, looseness, inclusions, and chemical composition instability, which lead to increased reluctance and poor electromagnetic performance, which affects the power of the generator and cannot adapt to the volume of today's automotive generators. The development trend of shrinking and increasing power, moreover, casting is easy to produce hard spots, and it is not easy to machine

[0005] 2. Stamping process: This process must use large-scale forging equipment, which requires a large initial investment, and this process cannot produce claw poles with yokes, and an additional yoke must be equipped, resulting in an assembly air gap and increased magnetic resistance, which affects the generator. power

However, this process requires two heatings, and the production cost is relatively high

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