Vehicle AC generator

Abstract

The present invention discloses a vehicle AC generator and relates to the technical field of generators. The vehicle AC generator comprises a front end cover, a rear end cover, a rotor and a stator. The rotor includes a front claw pole and a rear claw pole, wherein the front claw pole and the rear claw pole are arranged in the intersected manner. A coil frame is arranged between the front claw pole and the rear claw pole. A rotor coil is wound around the coil frame. The stator comprises a stator iron core and a stator coil wound on the stator iron core. The ratio Ns / Nr of the phase number Ns of turns on each slot of the stator coil, to the number Nr of turns of the rotor coil is larger than or equal to 0.017 and is smaller than or equal to 0.029. The ratio L3 / L4 of the height L3 of the stator iron core to the height L4 of a magnetic yoke is larger than or equal to 1 and is smaller than or equal to 1.24. The ratio L3 / Lr of the height L3 of the stator iron core to the total height Lr of the front claw pole and the rear claw pole is larger than or equal to 0.56 and is smaller than or equal to 0.69. According to the technical scheme of the invention, on the premise that the winding process condition is met, the design of a magnetic leakage factor and the magnetic resistance is optimized. The output power of the generator is increased and the induced electromotive force is improved. The size of the generator is reduced.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a vehicle alternator. Background technique [0002] In a car, the function of the alternator is to convert part of the mechanical energy of the engine into electrical energy, so as to supply power to the car's electrical equipment or battery. Existing automotive alternators generally include end covers, rotors, stators, pulleys, rectifier bridges and other components. , It is easy to cause large copper loss, high noise, and serious magnetic flux leakage of the generator, which greatly reduces the energy conversion rate and power generation of the generator, and affects the output performance of the generator. Based on the above reasons, the existing automotive alternator generally adopts a large-scale structural design to ensure the electricity demand of the automobile. Alternators are increasingly unable to meet the needs of users. Contents of the invention [0003] Base...

AI Technical Summary

Problems solved by technology

[0003] Based on the above, the present invention provides a vehicle alternator to solve the problems of low power generation efficiency, small output power, large volume, and large wind noise of existing alternators

Images