Stator transposition winding transient circulation calculation method based on three-dimensional electromagnetic coupling network

Abstract

The invention discloses a stator transposition winding transient circulation calculation method based on a three-dimensional electromagnetic coupling network, and relates to the technical field of parallel winding transposition strand transient circulation calculation. The invention aims at solving the problems that during current parallel-winding transposition strand circulation calculation, a main magnetic field, magnetic field nonlinearity and time-varying characteristics have large influences on calculation, the calculation difficulty is large when the influences are considered during calculation, and the error of a final calculation result is large when the influences are not considered. According to the invention, the transient iron core magnetic conductivity and the boundary transient vector magnetic potential in a stator tooth groove range are fitted. Comprising the steps of building a three-dimensional linear transient magnetic network of the same stator tooth groove area, and fixing transient iron core magnetic conductivity and boundary transient vector magnetic potential, thus a nonlinear time-varying electromagnetic field of the motor can be linearly solved; direct coupling the stator parallel winding transposition strand three-dimensional transient electric network and the three-dimensional linear transient magnetic network; and under the condition of considering the influence of a main magnetic field of the motor and magnetic field nonlinearity and time-varying characteristics, calculating the parallel winding strand circulation of different transposition structures of the stator.

Description

technical field [0001] The invention belongs to the technical field of transient circulation calculations around transposed strands. Background technique [0002] Due to the uneven distribution of the motor's magnetic field, the circulation between the stator and the winding strands will seriously affect the life of the winding insulation. In order to reduce the circulation, a braided transposition structure is adopted between the strands. At the same time, the accurate calculation of the transient circulation between the transposed strands around the stator is also a prerequisite for the design and safe operation of the stator winding of the motor. [0003] On the one hand, the strand transposition is based on the complex three-dimensional space model of the motor; on the other hand, the transient magnetic field inside the motor is determined by complex factors such as the relative motion of the stator and rotor, the main magnetic field, the nonlinearity of the ferromagnet...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the main magnetic field, magnetic field nonlinearity and time-varying property have a great influence on the calculation during the current calculation of the circulation around the transposed strand. Considering the influence during the calculation will lead to difficult calculation, and not considering the influence will lead to the final Due to the large error of the calculation results, a calculation method for the transient circulation of the stator transposition winding based on the three-dimensional electromagnetic coupling network is now provided

Images