Title: Calculate the air-gap magnetic field of tubular permanent magnet linear motor base on equivalent surface current model

Authors: Ke-feng Huang; Huai-shu Li; Yu Zhou

Addresses: College of Electrical and Information, Naval University of Engineering, Wuhan 430033, Hubei Province, China ' College of Electrical and Information, Naval University of Engineering, Wuhan 430033, Hubei Province, China ' College of Electrical and Information, Naval University of Engineering, Wuhan 430033, Hubei Province, China

Abstract: The air-gap magnetic field is an important design parameter for tubular permanent magnet linear motor including surface-mounted PMs (TPMSLM), as it significantly influences the thrust force capability and efficiency. Based on the results indicate that the existing analytical research methods of the air-gap magnetic field is not accurate. This tool has calculated the air-gap magnetic field of the current-carrying coil. Next, the analytic formula of air-gap magnetic field of the motor is derived from the equivalent surface current model. In order to verify the validity and accuracy of the proposed method, we took approximately a TPMSLM to analyse it. The results show that: the analytical method and finite element method to calculate the air-gap magnetic field were both in good agreement. The proposed motor air-gap magnetic field method is quick, effective, and had a high accuracy rate.

Keywords: tubular permanent magnet linear motors; equivalent surface current model; air-gap magnetic field; modelling; thrust force; finite element method; FEM.

DOI: 10.1504/IJESMS.2014.058420

International Journal of Engineering Systems Modelling and Simulation, 2014 Vol.6 No.1/2, pp.23 - 30

Available online: 23 Dec 2013 *

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