講座時間：2018年6月13日（周三）, 13:00—15:00
講座地點：泰山科研樓326
講座題目：電動汽車雙三相電機設計、多相逆變器直流排電容設計
講座摘要：
The presentation will discuss the findings from 2 Ph.D. research studies:
(1) “ Dual Three-Phase Permanent Magnet Synchronous Machine Investigation for Battery Electric Vehicle Power-trains”
A dual three phase machine with IPM rotor and distributed winding has been studied and compared to a commercial automotive traction machine, the Nissan Leaf IPM machine. The performance of the two designs are compared for typical traction operating points, via high torque, low speed and low torque, high speed, constant power field weakening operation. The dual three-phase machine is shown to have improved torque density and torque quality without compromising efficiency.
(2) “Multiphase Voltage Source Inverter DC-link Capacitor Considerations”
The investigation methodology and procedure for arbitrary phase number two level voltage source inverter (VSI) DC-link capacitors are developed including VSI DC-link capacitor introduction, multiphase VSI modelling and investigation method and capacitor requirements etc., based on which the DC-link capacitor requirements are analytically characterized for different phase number VSIs. Under the equitable operating conditions, the increase of the phase number inherently alleviates the DC-link capacitor requirements. Other factors, e.g. switching strategies, carrier waveforms and interleaving techniques, also determine the DC-link capacitor requirements. For the higher phase number VSIs, their increased configuration flexibilities make it possible to further decrease the DC-link capacitor requirements. The study is partially validated experimentally through the 3- and 9-phase VSIs driving brushless permanent magnet (BLPM) machines. Finally, the DC-link capacitor design procedure is proposed for two level multiphase VSIs.
主講人簡介：
Nigel Schofield received the degrees of B.Eng. (Hons.) in Electrical Power Engineering, and Ph.D. for research on the field-weakening capability of brushless permanent-magnet traction machines from the University of Sheffield, UK. He held academic posts at the Universities of Sheffield and Manchester, UK. He has also been a Design Engineer in industry, UK. From2013 to 2017 he was Full Professor with Tenure in the ECE Dept. at McMaster University, Ontario, Canada. In May 2017 he started in a new post as Professor in Electrical Engineering at the University of Huddersfield, UK. His research interests include electro-magnetic power-trains for all- and hybrid-electric vehicles. Prof. Schofield is a member of the IET and IEEE and a Chartered Engineer.
Contact details:
Nigel Schofield
University of Huddersfield, UK
Email: n.schofield@hud.ac.uk
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