Abstract
Dual rotor permanent magnet (DRPM) wind power generator using ferrite magnets has the advantages of low cost, high efficiency, and high torque density. How to further improve the performance and reduce the cost of the machine by proper choice of pole number and slot number is an important problem to be solved when performing preliminarily design a DRPM wind generator. This paper presents a comprehensive performance comparison of a DRPM wind generator using ferrite magnets with different slot and pole number combinations. The main winding factors are calculated by means of the star of slots. Under the same machine volume and ferrite consumption, the flux linkage, back-electromotive force (EMF), cogging torque, output torque, torque pulsation, and losses are investigated and compared using finite element analysis (FEA). The results show that the slot and pole number combinations have an important impact on the generator properties.
Highlights
For the past few years, the applications of permanent magnet generators (PMGs) in wind energy conversion system have been increasing for their significant advantages of high efficiency, simple structure, reliable operation and no additional power supply.[1]
Ferrite magnets possess the merits of low cost, low weight density, stainless and having a stable supply
The reported results mainly focused on the slot and pole number combination of PM machines,[4] but rarely studied on dual rotor permanent magnet (DRPM) machines
Summary
For the past few years, the applications of permanent magnet generators (PMGs) in wind energy conversion system have been increasing for their significant advantages of high efficiency, simple structure, reliable operation and no additional power supply.[1]. Ferrite magnets possess the merits of low cost, low weight density, stainless and having a stable supply. We may transplant the DRPM machine using ferrite magnets to wind power generation without sacrificing too much performance. For a DRPM wind generator using ferrite magnets, how to improve the performance and reduce the cost of the machine by proper choice of slot and pole number is an important problem to be solved. The reported results mainly focused on the slot and pole number combination of PM machines,[4] but rarely studied on DRPM machines. The results show that slot and pole number combinations have an important impact on generator properties, and some reference merits can be obtained in the DRPM wind generators
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