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From 1999 to 2009

Research and Development of Machine Drives and Power Conditioning and its Development for Electric Vehicles. From 1999 to 2009. Prof. Eric Cheng Department of Electrical Engineering. Four RGC projects leads to Electric Vehicles. From 1999 to 2002

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From 1999 to 2009

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  1. Research and Developmentof MachineDrives and Power Conditioning and its Development for Electric Vehicles From 1999 to 2009 Prof. Eric Cheng Department of Electrical Engineering

  2. Four RGC projects leads to Electric Vehicles From 1999 to 2002 Future Switched Reluctance Machine Drives and Associated Power Conditioning(RGC: PolyU5085/98E) From 2003 to 2005 Development of the Future Power Conversion Techniques Using Adaptive Control and Integrated Magnetics (PolyU 5103/01E) From 2004 to 2007 Design and Modeling of An Integrated Fuel Cell and Energy Storage System to Enhance Power System Performance and Reliability(PolyU 5245/04E) From 2007 to 2009 Formulation of DC Energy Factor and Its Implication on Control Method for High Efficiency Power Electronics Conversion System (PolyU 5136/06E)

  3. Future Switched Reluctance Machine Drives and Associated Power Conditioning(RGC: PolyU5085/98E) (1999~2004) • Outcome • Proposition of four models of SRM drives • Investigation ofeffects of control and output parameters on power factor in SRM drives • Proposition of new method to design controller with good power factor • Development of schemes to improve power factor in SRM drives • Development a soft-switching power conditioning

  4. Future Switched Reluctance Machine Drives and Associated Power Conditioning(RGC: PolyU5085/98E) (1999~2004) • Published papers • 10 Journal papers • 11 Conference papers

  5. Simulation of Switched Reluctance Motor Drives Using Two-dimensional Bicubic Spline IEEE Transactions on Energy Conversion The two-dimensional bicubic spline interpolation is used to describe the nonlinear magnetic characteristics in switched reluctance motors

  6. Influences of Outputs and Control Parameters upon the Power Factor Electrical Components and Systems Establish the comprehensive SRM drives design, and is valuable to designing the good controller with high power factor

  7. An Algorithm for Solving Initial Value Problems of Mutual-Coupling Electrical Components and Systems The non-linear modeling of multiphase switched reluctance motors can be used to simulate SRM more accurately.

  8. Trigonometry-Based Numerical Method and Self-Training Numerical to Compute Nonlinear Magnetic Characteristics IEEE Transactions on Magnetics Provide a valuable approach for performance torque prediction, design, simulation, sensorless drive and control of SRMs

  9. Improvement of Power Factor Drives through Optimizing the Switching Angles Electrical Components and Systems A novel control strategy to improve the power factor of switched reluctance motor drives is proposed and the two schemes to improve the power factor are developed.

  10. Correlation of ModelingTechniques and Power Factor IEE ProceedingsElectric Power Applications Unified modeling on sensorless control and power factor improvement of switched reluctance machine drives

  11. Position Stepping Method IEEE Transactions on Energy Conversion Based on 2-D bicubic spline and 2-D bilinear spline, the proposed position stepping method is used to predict the performances of switched reluctance motor (SRM) drives.

  12. DC-DC Power Conditioning IET Proceedings/Letter, IEEE Trans Ind. Elec, EPCS • Switched-capacitor power conditioning • A family of circuit topology • Improve the current shaping of the switched-reluctance drive

  13. Development of the Future Power Conversion Techniques Using Adaptive Control and Integrated Magnetics(RGC: PolyU5103/01E)(2002~2004) • Published papers • 7 Journal papers • 5 Conference papers

  14. Project Outcomes • Developed a new analyzed method for integrated magnetics • Developed the passivity control method for power converters • Developed a new Quasi Current Mode Control for DC-DC power converter

  15. Integrated Magnetics IEE Proceedings EPA Integrated magnetics version of Forward converter • Developed a number of integrated magnetic circuits • Examine the efficiency performance vs energy processing Boost-flyback converter

  16. Passivity control IEE Proceedings EPA • Developed an adaptive controller for the phase-shifted controller • Based on a passivity control theory Conventional new method Improvement of the output response using PBC

  17. Two Axis Indirect Current Mode Control IEEE Trans Power E • A novel indirect current mode control system with voltage compensation for the control of the phase shifted resonant converter • Regulating the quadrature components of the voltage applied to the resonant circuit Controlled PSRC with new structure Phasor diagram of the resonant circuit

  18. Design and Modeling of An Integrated Fuel Cell and Energy Storage System to Enhance Power System Performance and Reliability(PolyU 5245/04E)(2004~2007) • Outcomes • Developed a mathematic model of both dynamic and state-state for fuel cell • Fuel cell with magnetic energy storage • New family of ZCS and ZVS power conditioning • Published papers • 2 Journal papers • 2 Conference papers Fuel cell vehicle

  19. Unified Mathematical Modelling of Steady-State and Dynamic Voltage-Current Characteristics for PEM Fuel Cells ElectrochimicalActa Developed anovel approach for optimization of operating points of fuel cells and design of power conditioning units, simulators, and system controllers.

  20. ZVS and ZCS buck-boost converter (IET Power Electronics) Zepic • Work well with fuel cell • Has applied to fuel cell vehicle • Zero-current and zero-voltage switching • Family of circuits developed Buck-boost

  21. Formulation of DC Energy Factor and Its Implication on Control Method for High Efficiency Power Electronics Conversion System (PolyU 5136/06E)(2007~2009) • Develop a new definition of the energy factor for DC-DC power conversion • Developed the energy factor control method • Improve efficiency of the converter through energy factor • Published papers • 2 Submitted Journal papers • 2 Conference papers

  22. Boundary condition analysis • Developed the boundary condition for the Switched-mode converter • Developed the formulation of energy factor under boundary condition

  23. Generalized analysis for energy storage • Developed the generalized energy in storage device • Developed the characteristics with duty ratio • Provide the techniques to select power converter for various power applications Non-active instantaneous power Energy Factor Under CCM Input energy factors under CCM

  24. The Development of Electric Vehicles • Through the GRC projects, it leads to the following technological developments: • SR motor design • SR motor drive • High frequency magnetic design • Family of switched mode high power converters • Soft-switching power condition • Fuel cell power conditioning • Energy storage device • Optimal Performance of converters

  25. Motor and DrivesElectric Vehicle Development • Integration of motor and wheel • Reduce all the mechanical interfacing • In-wheel motor vehicle SRM driver SRM Finite element model

  26. Power Converter Driver to LED and HID Lighting • Developed the LED driver • Developed the HID lamp driver • Installed on commercial vehicle HID lamp LED Headlight LED and HID headlight LED lamp and driver HID lamp ballast LED Tail light

  27. Charging system CLP Power charging system in Hong Kong High power fast charger Battery Management System Simple plug-in EV

  28. In-wheel motor for 4-wheel drive 1st Electric Vehicle using in-wheel reluctance drives

  29. DC-DC Power Design for Electric Vehicle 1st commercial vehicle in HK Conversion to EV

  30. Summary • Research and development of Power Electronics technology in Switched Reluctance Machine drives, DC-DC Power Conversion, Magnetics and Energy Storage Advanced design and control techniques have been developed. • Arising from RGF, 20 journal papers and numerous conference papers have been published. • Applications to electric vehicles are most prominent • Extend the research to commercial products and collaborate with a number of companies CLP, Tenpao, Shun Hing Power, Fok Yin Tung, Hopewell,…

  31. Thank You

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