Magnetic flux density analysis of wound rotor induction motor by permeance model

Abstract

A fast calculation method for parametric survey is needed when designing motors. We propose a new method for analyzing the harmonic components of air-gap flux density distribution in three-phase wound rotor induction motors. The proposed method is based on analytical equations for permeance and magnetomotive force distribution, considering the influence of the circumference slot arrangement and winding pattern of the motor. Thus, the harmonic components of the air-gap flux density distribution can be analyzed in a short time. The analysis results of the proposed method are in agreement with those of finite element magnetic analysis in on-load condition. Consequently, this method is shown to be suitable for quantitatively estimating the flux density of wound rotor induction motors and useful for parametric survey when designing wound rotor induction motors.

Magneto-Motive Force and Performance Comparative Analysis Research for a Novel Pentacle-Star Hybird Winding Five-Phase Induction Motor

“…Further, the voltage or current waveform output by the inverter is not a standard sine wave, but contains a harmonic component which cannot be ignored, and the produced harmonic Magneto-Motive Force (MMF) has a great influence on the operational performance of the motor. Therefore, many research institutes and universities have paid attention to the following four aspects: 1) the structural design of multi-phase motors, as good structural design can effectively reduce the influence of spatial harmonics on motor performance (e.g., start-up performance and magnetic noise); 2) the relationship between harmonic current and the harmonic MMF of multi-phase motors with different structure under a non-sinusoidal power supply; 3) how to effectively use the harmonics to improve motor performance; and 4) fault diagnosis and fault-tolerant control of multi-phase motors [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

“…Magnetic Finite Element Analysis (FEA) and algebraic equation analysis based on the permeance model have been used to analyze the harmonic components of air-gap flux density distribution when designing induction motors [9,10]. Time and spatial harmonics have been researched using analytical methods and equivalent circuit methods [11,12].…”