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Energies 2015, 8(4), 2867-2888; doi:10.3390/en8042867

Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

School of Automation, Beijing Institute of Technology, Beijing 100081, China
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Academic Editor: Chris Bingham
Received: 3 December 2014 / Revised: 7 April 2015 / Accepted: 7 April 2015 / Published: 15 April 2015
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Abstract

Due to advantages such as high energy density, high power density, rapid charge and discharge, high cyclic-life, and environmentally friendly, flywheel energy storage systems (FESs) are widely used in various fields. However, the performance of FES systems depends on the performance of a high speed machine, therefore, the design and optimization of a high efficiency and high power density machine are very crucial to improve the performance of the whole FES system. In this paper, a high speed permanent-magnet synchronous machine (PMSM) is researched. Considering the requirement of low torque ripple in low speed and loss caused by back electromotive force (EMF) harmonics, the electromagnetic performance is improved from points of view of slot/pole matching, magnetic-pole embrace with the finite element method (FEM). Furthermore, the magnetic-pole eccentricity, the slot opening, the thickness of PM and air-gap length are also optimized with Taguchi method. The electromagnetic performance, such as torque ripple, cogging torque, average torque and back EMF wave are much improved after optimization. Finally, experiments are carried out to verify the calculated results. View Full-Text
Keywords: flywheel energy storage (FES); high speed; permanent-magnet synchronous machine (PMSM); torque ripple; Taguchi method; back electromotive force (EMF); cogging torque flywheel energy storage (FES); high speed; permanent-magnet synchronous machine (PMSM); torque ripple; Taguchi method; back electromotive force (EMF); cogging torque
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhao, J.; Gu, Z.; Li, B.; Liu, X.; Li, X.; Chen, Z. Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage. Energies 2015, 8, 2867-2888.

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