Design of five-phase ferrite magnet assisted synchronous reluctance motor using lumped parameter model based optimizer and FEA

This paper proposes an efficient and reliable five-phase ferrite magnet assisted synchronous reluctance motor (Fa-SynRM) which exhibits comparable performance to a five-phase rare-earth permanent magnet based PMa-SynRM. Five-phase PMa-SynRM offers higher reliability and lower torque ripple compared to conventional three phase PMa-SynRMs, and low-cost ferrite magnet potentially decrease the manufacturing cost. However, lower strength of ferrite magnets require more magnet composition and increase stress towards the edges of flux barriers. Demagnetization of ferrite magnets is another factor to be considered in designing the Fa-SynRM. Initially, to develop an optimal and sustainable design, a lumped parameter model (LPM) based optimizer and a finite element model (FEA) has been used to extract an optimal model. The designs are further optimized to reduce the cost and develop more robust models to stress and demagnetization. Finally, the performance and cost of the developed models have been compared to those of benchmark model and initial LPM model.

[1]  Sai Sudheer Reddy Bonthu,et al.  Optimal design of five-phase permanent magnet assisted synchronous reluctance motor for low output torque ripple , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[2]  Hans Bernhoff,et al.  Electrical Motor Drivelines in Commercial All-Electric Vehicles: A Review , 2012, IEEE Transactions on Vehicular Technology.

[3]  G. Pellegrino,et al.  Comparison of Induction and PM Synchronous Motor Drives for EV Application Including Design Examples , 2012, IEEE Transactions on Industry Applications.

[4]  Shigeo Morimoto,et al.  Performance evaluation of a high power density PMASynRM with ferrite magnets , 2011 .

[5]  M. Obata,et al.  Performance of PMASynRM With Ferrite Magnets for EV/HEV Applications Considering Productivity , 2014, IEEE Transactions on Industry Applications.

[6]  Longya Xu,et al.  Low-Cost Ferrite PM-Assisted Synchronous Reluctance Machine for Electric Vehicles , 2014, IEEE Transactions on Industrial Electronics.

[7]  Sai Sudheer Reddy Bonthu,et al.  Comparison of optimized permanent magnet assisted synchronous reluctance motors with three-phase and five-phase systems , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[8]  Thomas M. Jahns,et al.  Mechanical design considerations for conventionally laminated, high-speed, interior PM synchronous machine rotors , 2004 .

[9]  Akira Chiba,et al.  Development of a Rare-Earth-Free SR Motor With High Torque Density for Hybrid Vehicles , 2015, IEEE Transactions on Energy Conversion.