Open AccessLinear primary permanent magnet vernier machine for wave energy conversion
Author(s) -
Du Yi,
Cheng Ming,
Chau Kwok Tong,
Liu Xianxing,
Xiao Feng,
Zhao Wenxiang
Publication year - 2015
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2014.0138
Subject(s) - vernier scale , magnet , flux linkage , thrust , inductance , finite element method , machine tool , energy (signal processing) , engineering , mechanical engineering , control theory (sociology) , computer science , electrical engineering , physics , voltage , structural engineering , artificial intelligence , direct torque control , optics , quantum mechanics , control (management) , induction motor
In this paper, a new linear primary permanent magnet vernier (LPPMV) machine is developed for direct‐drive wave energy conversion. Owing to the magnetic gearing effect, the LPPMV machine possesses the advantages of high thrust force and low speed motion. After describing the machine structure, the operation principle of the machine is analysed and compared using two methods, namely, the magnetic gearing principle and the straightforward magnetic path. Then the characteristics are analysed by using the finite element method. Considering the unbalance of the no‐load flux linkage and the inductance among the three phases, the mathematical model of the proposed machine is established, which is significantly different to that of the traditional permanent magnet machine. Finally, the machine is prototyped and tested so as to experimentally verify the theoretical analysis.