Compound excitation generator for electric automobiles

Abstract

The invention relates to a compound excitation generator for electric automobiles, which belongs to the technical field of automobile electric motors and appliances and comprises rotors, a stator, a front end cover (15), a back end cover (3) and an electronic controller (2). The compound excitation generator is characterized in that the electric excitation rotor and the permanent-magnet rotor areinstalled on a shaft (1) and separated by a residual shim (10); the electric excitation rotor and the permanent-magnet rotor share an armature winding (11), and the produced magnetic potentials are synthesized by connecting in parallel in a magnetic path; and when in use, the magnitude and the direction of the electrifying current of the electric excitation rotor are regulated, so that the magnetic field superimposed by an electric excitation magnetic field and a permanent-magnet magnetic field can be regulated to ensure that the generator can output direct current with stable voltage within wide rotating speed and load. The generator has the advantages of compact structure, convenient installation, and safe and reliable operation.

Description

technical field [0001] The invention provides a compound excitation generator for an electric vehicle, which belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] The automobile industry is a symbol of modern industry and a leading industry in the development of the national economy. It plays an indispensable role in all aspects of industrial and agricultural production, transportation, and human production and life. At present, generators used in conjunction with automobiles are ubiquitous There are problems such as high failure rate, low output power, and failure to meet user requirements. For example, the published utility model patent: hybrid excitation automobile alternator, application number: 200720091005.5, consists of claw pole rotor, stator, front end cover, rear end cover, and electronic controller. On the basis of electric excitation, rare earth permanent magnet excitation is added, and a hybrid excitation s...

AI Technical Summary

Problems solved by technology

[0002] The automobile industry is a symbol of modern industry and a leading industry in the development of the national economy. It plays an indispensable role in all aspects of industrial and agricultural production, transportation, and human production and life. At present, generators used in conjunction with automobiles are ubiquitous Problems such as high failure rate, low output power, and failure to meet user requirements

For example, the published utility model patent: hybrid excitation automobile alternator, application number: 200720091005.5, consists of claw pole rotor, stator, front end cover, rear end cover, and electronic controller. On the basis of electric excitation, rare earth permanent magnet excitation is added, and a hybrid excitation structure of electromagnetic + permanent magnet is adopted. The key technology is that the claw pole rotor is equipped with magnetic steel, and the magnetic steel is placed between adjacent claw pole rotors of different polarities. The left and right sides of the magnetic steel are inclined surfaces with a taper of 1:5. This method is to paste the magnetic steel between each pair of electric excitation claw poles. It is required that the gap between each pair of electric excitation claw poles should be uniform, and the assembly accuracy is high. The process is complicated and the cost is high; another example is the published utility model patent: the dual magnetic field generator for automobiles and the voltage regulator used with it, the application number: 200420086799.2, the rotor is equipped with permanent magnet claws and electric excitation claws, and the permanent magnet claws are A claw pole and a claw pole of its adjacent electric excitation claw are a whole or two objects close to each other. The excitation coil of the electric excitation claw is connected to the output terminal of a voltage regulator with a built-in current commutator connect

This patent describes a dual magnetic field generator composed of a permanent magnet rotor with a claw pole structure and an electrically excited rotor with a brushless claw pole structure. The permanent magnet rotor with a claw pole structure passes the axially magnetized permanent magnetic field through the claw poles. Changed to a radial magnetic field with multiple poles, there are many air gaps in the magnetic field, large magnetic flux leakage, and low material utilization, and its performance needs to be further improved

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