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The Scientific World Journal
Volume 2014 (2014), Article ID 258109, 7 pages
http://dx.doi.org/10.1155/2014/258109
Research Article

Design and Analysis of Tubular Permanent Magnet Linear Wave Generator

School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China

Received 2 March 2014; Revised 19 May 2014; Accepted 3 June 2014; Published 23 June 2014

Academic Editor: Wenxiang Zhao

Copyright © 2014 Jikai Si et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Due to the lack of mature design program for the tubular permanent magnet linear wave generator (TPMLWG) and poor sinusoidal characteristics of the air gap flux density for the traditional surface-mounted TPMLWG, a design method and a new secondary structure of TPMLWG are proposed. An equivalent mathematical model of TPMLWG is established to adopt the transformation relationship between the linear velocity of permanent magnet rotary generator and the operating speed of TPMLWG, to determine the structure parameters of the TPMLWG. The new secondary structure of the TPMLWG contains surface-mounted permanent magnets and the interior permanent magnets, which form a series-parallel hybrid magnetic circuit, and their reasonable structure parameters are designed to get the optimum pole-arc coefficient. The electromagnetic field and temperature field of TPMLWG are analyzed using finite element method. It can be included that the sinusoidal characteristics of air gap flux density of the new secondary structure TPMLWG are improved, the cogging force as well as mechanical vibration is reduced in the process of operation, and the stable temperature rise of generator meets the design requirements when adopting the new secondary structure of the TPMLWG.