1. 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

2. …..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

3. 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

4. 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

5. Dept. of EE …..Power the future http://perc.polyu.edu.hk EV show case

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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