Performance evaluation of a permanent magnet-assisted synchronous reluctance machine with hybrid magnets of ferrite magnets and rare-earth PMs

2018 ◽  
Vol 56 (3) ◽  
pp. 413-426
Author(s):  
Xiping Liu ◽  
Ya Li ◽  
Zhangqi Liu ◽  
Zhixuan Zhang
Keyword(s):  
Performance Evaluation ◽  
Rare Earth ◽  
Permanent Magnet ◽  
Synchronous Reluctance Machine ◽  
Reluctance Machine

scholarly journals Performance Evaluation of a Permanent Magnet-Assisted Synchronous Reluctance Machine with Hybrid Magnets of Ferrite Magnets and Rare-earth PMs

2017 ◽  
Author(s):  
Xiping Liu ◽  
Ya Li ◽  
Zhangqi Liu
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Torque Ripple ◽  
Hybrid Magnet ◽  
Element Analysis ◽  
Cost Performance ◽  
Synchronous Reluctance Machine ◽  
Reluctance Machine ◽  
Output Torque ◽  
Loss Efficiency

In this paper, a novel permanent magnet-assisted synchronous reluctance machine (PMASynRM) with rare-earth PMs and ferrite magnets is proposed. The performance of PMASynRM is discussed with respected to the different magnet ratio of rare-earth PMs and ferrite magnets. Some characteristics including the flux density, output torque, cogging torque, output power, power factor, torque ripple, loss, efficiency, and demagnetization are calculated by 2-D finite element analysis (FEA). The analysis results show that the excellent performance can be obtained by using hybrid magnet of rare-earth PMs and ferrite magnets with the suitable magnet ratio, and provide some desirable cost-performance trade-off.

Optimal design of synchronous reluctance machine

2014 ◽  
Vol 33 (5) ◽  
pp. 1569-1586 ◽  
Author(s):  
Haiwei Cai ◽  
Bo Guan ◽  
Longya Xu ◽  
Woongchul Choi
Keyword(s):  
Rare Earth ◽  
Optimal Design ◽  
Permanent Magnet ◽  
Torque Ripple ◽  
Content Type ◽  
Synchronous Reluctance Machine ◽  
Reluctance Machine ◽  
Interior Permanent Magnet ◽  
Ipm Machine ◽  
Lower Torque

Purpose – The purpose of this paper is to present optimally designed synchronous reluctance machine (SynRM) to demonstrate the feasibility of eliminating the use of rare earth permanent magnet (PM) in electric machine for vehicle traction applications. Design/methodology/approach – A typical rare earth interior permanent magnet (IPM) machine is used as the benchmark to conduct the optimal design study. Based on the flux distribution, major changes are made to the rotor lamination design. Enhanced torque production and lower torque ripple are specifically targeted as the two main objectives of the proposed design approach. Findings – As a result, the optimally designed SynRM can achieve performance very close to that of the benchmark PM machine with a potential for further improvement. Originality/value – Discussions of IPM replacement by optimally designed SynRM in electrical and hybrid electrical vehicles are given in terms of performance and cost.

Analysis and design of a high power density permanent magnet-assisted synchronous reluctance machine with low-cost ferrite magnets for EVs/HEVs

2016 ◽  
Vol 35 (6) ◽  
pp. 1949-1964 ◽  
Author(s):  
Xiping Liu ◽  
Ya Li ◽  
Zhangqi Liu ◽  
Tao Ling ◽  
Zhenhua Luo
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Power Density ◽  
High Power ◽  
Low Cost ◽  
High Power Density ◽  
Content Type ◽  
Synchronous Reluctance Machine ◽  
Reluctance Machine ◽  
Rotor Structure

Purpose The purpose of this paper is to propose a permanent magnet-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rare-earth PM synchronous motors used in Toyota Prius 2010. Design/methodology/approach A novel rotor structure with rectangular PMs is discussed with respect to the demagnetization of ferrite magnets and mechanical strength. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2D finite element analysis. Findings The results of the analysis show that a high power density and high efficiency for PMASynRM can be achieved using ferrite magnets. Originality/value This paper proposes a novel rotor structure of PMASynRM with low-cost ferrite magnets that achieves high power density as permanent machines with rare-earth PMs.

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