Electromagnetic noise simulation method for claw pole alternator under stator winding inter-turn short circuit

Abstract

The invention relates to an electromagnetic noise simulation method for a claw pole alternator under stator winding inter-turn short circuit. The method comprises the steps of 1, establishing a working circuit model of the claw pole alternator and an electromagnetic field finite element model of the claw pole alternator when the winding inter-turn short circuit occurs, through utilization of software, according to an electromagnetic parameter of the claw pole alternator and a stator winding inter-turn short circuit fault situation, and carrying out simulation in the working circuit model to obtain a stator three-phase current of the claw pole alternator when the stator winding inter-turn short circuit occurs; 2, loading the stator three-phase current to a circuit model of the electromagnetic field finite element model, and carrying out simulation to obtain electromagnetic force born by the claw pole alternator when the stator winding inter-turn short circuit occurs; and 3, loading theelectromagnetic force to a structure finite element model of the claw pole alternator in a grid mapping mode, and carrying out calculation to obtain an electromagnetic noise simulation result of the claw pole alternator when the winding inter-turn short circuit occurs. Compared with the prior art, the method has the advantage that influences of two stator winding inter-turn short circuit forms onelectromagnetic noises can be quantitatively analyzed.

Description

technical field [0001] The invention relates to the field of finite element simulation of claw pole generators, in particular to an electromagnetic noise simulation method of claw pole generators under inter-turn short circuit of stator windings. Background technique [0002] Because the claw pole generator has the advantages of simple structure, low manufacturing cost and high reliability, it has been widely used in the field of automobile generators. However, the high-temperature and high-vibration working environment of the engine compartment and the high electrical load and high magnetic load operating conditions make claw pole generators prone to inter-turn short circuit faults. The identification and diagnosis of winding inter-turn short-circuit faults and the analysis of electromagnetic noise characteristics during short-circuit are a research focus and difficulty of automotive claw-pole generators. At present, the research is mainly carried out through test methods. ...

AI Technical Summary

Problems solved by technology

This method can only simulate and calculate the electromagnetic noise under normal conditions, but cannot calculate the electromagnetic noise when the winding turns are short-circuited. In addition, this method loads the distributed electromagnetic force on each stator tooth surface as a concentrated force, changing the electromagnetic The spatial distribution characteristics of the force will bring errors to the simulation results

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