Nonlinear inductance modeling method for three-phase electrically excited doubly salient motors

Abstract

The invention provides a nonlinear inductance modeling method for three-phase electrically excited doubly salient motors. The nonlinear inductance modeling method is based on influence laws of armature currents and excitation currents of the three-phase electrically excited doubly salient motors on inductance parameters. The nonlinear inductance modeling method includes acquiring transverse axis translation of two curves by the aid of influence relation curves of the armature currents on the inductance parameters under two excitation current conditions; acquiring the influence relation curvesof the armature currents on the inductance parameters in total excitation current ranges in correspondence to excitation current difference values of the two curves. The nonlinear inductance modelingmethod has the advantages that influence of armature reaction and excitation magnetic field variation are taken into account, and the nonlinear inductance modeling method for the three-phase electrically excited doubly salient motors is accurate, simple and convenient.

Description

technical field [0001] The invention relates to the field of motor modeling, in particular to a method for modeling inductance parameters of a three-phase electric excitation double salient pole motor. Background technique [0002] Electric excitation double salient pole motor is a new type of reluctance motor developed based on permanent magnet double salient pole motor. The stator and rotor are both salient pole structures. There is no winding on the rotor. The structure is simple and the reliability is high. The field winding is placed so that its air gap flux can be adjusted flexibly, and it has attracted extensive attention in the fields of aviation and new energy. The air gap magnetic field of the electrically excited double salient pole motor has significant edge effects and a high degree of local saturation. At the same time, its armature reaction is relatively complex, with both magnetization and demagnetization, which leads to its inductance and armature current T...

AI Technical Summary

Problems solved by technology

The air gap magnetic field of the electrically excited double salient pole motor has significant edge effects and a high degree of local saturation. At the same time, its armature reaction is relatively complex, with both magnetization and demagnetization, which leads to its inductance and armature current The waveform of the electrically excited double salient pole motor is distorted, which makes the modeling of the electrically excited double salient pole motor more difficult. Therefore, it is of great significance to study the modeling of the nonlinear inductance of the electrically excited double salient pole motor.

[0003] At home and abroad, there are few studies on the inductance parameters of electrically excited doubly salient pole motors. Most of the methods used refer to the SRM inductance parameter modeling method, and the influence of armature reaction and excitation magnetic field changes on the inductance parameters is not considered at the same time.

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