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Dept. of Electrical Engineering …..Power the future http://www.ee.polyu.edu.hk The Hong Kong Polytechnic University Power Electronics Research Prof. Eric Cheng Power Electronics Research Laboratory Dept. of Electrical Engineering
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…..Power the future http://perc.polyu.edu.hk The Hong Kong Polytechnic University Largest Power Electronics Group in the region 30 Research Personnel 14 Academic staff More than $10M R&D funding in 2008-2009 Produces more than 40 Journal papers and 60 Conference papers in per year Supporting research for automotive: DC power conversion, Battery technology, Electrical system, Lighting, Motor technology, Actuation, Green energy The team is well-known in the region for EV and power electronics design Equipment and Research for Power Electronics
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Dept. of EE …..Power the future http://www.ee.polyu.edu.hk Electric Vehicle (Opening in Exhibition Center) Capability to develop EV from 2kW to 20kW Real prototype EV has designed: MyCar TM 2kW, 3kW, 6kW –Smart TM 5kW-20kW –Golf cart 3kW, 4kW
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Dept. of EE …..Power the future http://perc.polyu.edu.hk Electric Vehicle (Security car) Site test at Diamond Coast International Kart circuit Three MyCar(s) delivered at MTR Site MyCar Specifications: Battery:48V Power:3.5kW Range:100km Charging time:8hr(slow) 2 hr (fast) Technology: Battery management Battery charger Electrical system design Vehicle lighting Motor design Motor drive System control Vehicle safety
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Dept. of EE …..Power the future http://perc.polyu.edu.hk EV show case
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Dept. of Electrical Engineering …..Power the future http://www.ee.polyu.edu.hk The Hong Kong Polytechnic University DC voltage management and Power converters Soft-switching converter Technologies and Features: Soft-switching Resonant converter Simple and high performance in control Latest Power electronics Many different combinations in power conversion Low profile converter Low profile magnetics High efficiency topology
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Dept. of Electrical Engineering ….Power the futurehttp://perc.polyu.edu.hk Motor Drive Hong Kong Polytechnic University Why our drive better : Fault tolerance Low cost – 20% < induction motor Low weight - 20% <induction motor Direct drive High power regenerative braking Extend to Anti-lock Braking System (ABS) Extend to Skid steering (EST) Technologies and Features: Based on switched-reluctance machines High efficiency High low speed torque Simple design and high performance 1 st SR in-wheel machines in the world IVVC control for inductors motors Research: machines design, driver, torque control, switching angle
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Dept. of Electrical Engineering ….Power the future http://www.ee.polyu.edu.hk Hong Kong Polytechnic University To develop new generation Electric Vehicle A HK and an Italian company support Project $4 million Duration 2 years Funding source: HK Government and industry Research:DC-DC power conversion, battery charger, electronic lighting. High power regeneration and motoring My Car project – 1 st commercial self- developed electric vehicle
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Dept. of Electrical Engineering ….Power the future http://perc.polyu.edu.hk Hong Kong Polytechnic University Training for Stoke patents 1 st mini-version in Hong Kong Joint research with Rehabilitation Science Use EMG signal to control the training method Research content: –Signal processing for EMG –Intelligent motion control –Motor torque control Robotic Arm for Rehabilitation
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Dept. of Electrical Engineering ….Power the futurehttp://www.ee.polyu.edu.hk Hong Kong Polytechnic University To develop new generation Polymer-bonded magnetic devices Four companies support Project $4 million Duration 2 years Brussel Innova Gold medal with Mention 2007 and China National invention award 2006 Research: Modeling, Finite element, Converters Polymer bonded Magnetics
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Dept. of Electrical Engineering ….Power the futurehttp://perc.polyu.edu.hk Hong Kong Polytechnic University Combine two separate systems: Charger and motor drive into single system $4 Million funding Reduce cost, size and weight by half Research: soft-switching, topology analysis Intelligent control Integrated Charger and Motor Drive
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Dept. of Electrical Engineering ….Power the futurehttp://perc.polyu.edu.hk Hong Kong Polytechnic University High power superbright LED Maximum power point tracking Thermal management LED and Solar street lamp
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Dept. of Electrical Engineering ….Power the futurehttp://perc.polyu.edu.hk Hong Kong Polytechnic University Finite element Multi-coil design for inductor H-bridge resonant converter Consumer Design Award 2008 Induction Heating
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Dept. of Electrical Engineering ….Power the future http://www.ee.polyu.edu.hk Hong Kong Polytechnic University Automotive HID and LED lightings $8.8 Million Polymer-bonded magnetic $4 Million IVVC control for motors $0.72 Million In-Wheel motor for vehicle $4.1 Million Next generation electric vehicle $4 Million Integrated charger and controller $4 Million Electric air-conditioning $2.5 Million Induction heating wok station $0.8 Million Vehicle charger network $0.7 Million Linear motor - active suspension $6 Million Funding source: Guangdong and HK Government, industry and University Examples of Large Industrial Projects
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Dept. of Electrical Engineering ….Power the future http://perc.polyu.edu.hk Hong Kong Polytechnic University Electromagnetic Interference The high frequency around, the environmental is full of high frequency EMI The high dv/dt and di/dt induce high damaged voltage and current to attack the automotive system Near field test EMC signature
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Dept. of Electrical Engineering ….Power the future http://www.ee.polyu.edu.hk Hong Kong Polytechnic University Conclusion 1 st plastic magnetic core for power conversion in the world 1 st Large EV research group in Hong Kong 1 st Self developed commercial electric vehicle in Hong Kong 1 st in-wheel motor using the switched-reluctance technology 1 st Integrated charger and motor drive in Town car 1 st charger station network in Hong Kong Largest power electronics research group in the region Highest number of research papers in power electronics, machines and drives in the region
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Dept. of Electrical Engineering ….Power the future http://perc.polyu.edu.hk Hong Kong Polytechnic University Conclusion Power Electronics Research Centre (PERC) Fully supported from the industry and government. Research in fundamental study as well as applied research Aims - to help local industry and the region 电力电子研究中心 (PERC) 得到了工业界和政府支持 基础研究和应用研究同时进行 目标 - 提升本地区及其工业界的竞争力 Contact: Prof. Eric Cheng, Dept. of EE, HK PolyU Tel: +852-27666162, Email: eeecheng@polyu.edu.hk
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Dept. of Electrical Engineering ….Power the futurehttp://www.ee.polyu.edu.hk Hong Kong Polytechnic University The techniques we use High frequency switching Soft-switching High frequency magnetics High Speed synchronous conduction Intelligent motor drives Features: High power density High reliability High temperature range
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