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For high speed permanent magnet machine, it is necessary to meet the requirements including electromagnetic properties, mechanical properties and temperature, so it is a multi-physics field iterative design process. Based on the electromagnetic field, the temperature field, the stress field and the rotor dynamics, a 360kW, 7000r/min high speed permanent magnet machine is analyzed. Through the multi-physics...
This paper presents the design and analysis of a novel permanent-magnet (PM)-assisted synchronous reluctance machine (PMA-SynRM) with axially integrated magnets for improving machine performance by using a finite-element method (FEM). The proposed PMA-SynRM features a simple structure with high performance by incorporating the advantages of a SynRM and a surface-mounted PM machine (SPMM). In particular,...
Permanent magnet (PM) of the high speed permanent magnet machine has to be protected to resist the huge centrifugal force. One of the mature protective measure is to retain the PM with the nonmagnetic alloy sleeve. However, the rotor eddy-current losses would increase meantime. Decreasing the sleeve thickness would reduce the eddy-current losses of the machine but decrease the mechanical strength...
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