# Yan-Fei Liu

## Patents

- Z. Zhang, Y.F. Liu, "Current Source Gate Driver", US Patent, patent number 8,085,083 B2, Dec. 27, 2011.
- Y.F. Liu, E. Meyer,"DC-DC Converter with Improved Dynamic Response", US Patent, patent number 8,054,058 B2, Nov. 8, 2011.
- R.K. Orr, Y.F. Liu,"Distributed Power Supply Arrangement", US Patent, patent number 7,936,088 B2, May 3,2011.
- R.K. Orr, Y.F. Liu, "Distributed Power Supply Arrangement", US Patent, patent number 7,622,824 B2, Nov. 24, 2009.
- Z. Yang, Y.F. Liu,"Resonant Gate Drive Circuits", US Patent, patent number 7,612,602 B2, Nov. 3, 2009.
- Y.F. Liu, Z. Yang, W. Eberie,"Resonant Gate Drive Circuits", US Patent, patent number 7,598,792 B2, Oct. 6, 2009.
- W. Zhang, Y.F. Liu, B. Wu,"Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction" US Patent, patent number 7,514,913 B2, Apr. 7, 2009.
- Y.F. Liu, K. Xu, "Resonant Gate Drive Circuit with Centre-Tapped Transformer" US Patent, patent number 7,453,292 B2, Nov. 18, 2008.
- W. Zhang, Y.F. Liu, B. Wu, "Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor .Correction", US Patent, patent number 7,317,625 B2, Jan. 8, 2008.
- Y.F. Liu, S. Ye,"Non-Isolated DC-DC Converters with Direct Primary to Load Current", US Patent, patent number 7,307,857 B2, Dec. 11, 2007.
- Y.F. Liu, S. Ye,"Non Isolated DC-DC Converters with Direct Primary To Load Current", US Patent, patent number 7,110,265 B2, Sept. 19, 2006.
- Y.F. Liu, S. Ye, "Isolated DC-DC Converters", US Patent, patent number 7,079,403 B2, Jul. 18, 2006.
- Y.F. Liu, R. Orr, K. Xu,"Apparatus and Method of Controlling Low Frequency Load Currents Drawn From a DC Source in a Telecommunications Systems", US Patent, patent number 6,980,783 B2, Dec. 27, 2005.
- R.K. Orr, Y.F. Liu, D.A. Brown, R. Duvnjak,"Signal and Power Transformers Coupling Arrangements", US Patent, patent number 6,911,746 B2, Jun. 28, 2005.
- R.K. Orr, Y.F. Liu, R.P. Colbeck, D.A. Brown, H.F. Horwitz,"Power Supply Controller", US Patent, patent number 6,850,048 B2, Feb. 1, 2005.
- R.K. Orr, Y.F. Liu, "DC Converters", US Patent, patent number 6,771,518 B2, Aug. 3, 2004.
- P.K. Jain, Y.F. Liu, "Topology and Control Method for Power Factor Correction", US Patent, patent number 6,344, 986 B1, Feb. 5, 2002.
- P. Jain, Y.F. Liu, S. Mangat, "Asymmetrical Pulse Width Modulated Resonant DC-DC Converter with Compensating Circuitry", US Patent, patent number 6,097,614, Aug. 1, 2000.
- P.K. Jain, Y.F. Liu, Y. Xi, "Flyback Converter with Soft Switching using Auxiliary Switch and Resonant Circuit", US Patent, patent number 6,005,782, Dec. 21, 1999.
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**Journal Papers**** **

**Journal Papers**

- Z. Hu, Y.F. Liu and P.C. Sen, "Bang-Bang Charge Control for LLC Resonant Converters" IEEE Transactions on Power Electronics, Vol 30, No 2, February 2015. pp. 1093-1108.
- Z. Hu, Y. Qiu, and Y.-F. Liu, "A control strategy and design method for interleaved LLC converters operating at variable switching frequency,"IEEE Trans. Power Electron. Vol 29, No.8, August 2014. pp. 4426-4437
- Z. Zhang, F.F Li, Y.F. Liu, , "A High Frequecy Dual-Channel Isolated Resonant Gate Driver with Low Gate Drive Loss for ZVS Full-Bridge Converters" IEEE Transactions on Power Electronics, early access, 2014.
- Z. Hu, Y. Qiu, L. Wang and Y.F. Liu, "An Interleaved LLC Resonant Converter Operating at Constant Switching Frequency" IEEE Transactions on Power Electronics, Vol. 29, No. 6, pp.2931-2943, June. 2014.
- Z. Hu, Y.F. Liu, T.H. Yeap and L. Ge, "A Communication Protocol with Data Compression for Isolated Digital Power Supplies," IEEE Transactions on Power Electronics, Vol. 29, No. 4, April 2014. pp. 2109-2123.
- D. Wang, Y.F. Liu, "A Zero-Crossing Noise Filter for Driving Synchronous Rectifiers of LLC Resonant Converter" IEEE Transactions on Power Electronics, Vol. 29, No. 4, April 2014. pp. 1953-1965.
- Z. Zhang, C. Xu, Y.F. Liu, "A Digital Adaptive Discontinuous Current Source Driver for High Frequency Interleaved Boost PFC Converters," IEEE Transactions on Power Electronics, Vol. 29, No. 3, March 2014. pp. 1298-1310.
- Z. Zhang, X.F. He and Y.F. Liu, "An Optimal Control Method for Photovoltaic Grid-Tied-Interleaved Flyback Microinverters to Achieve High Efficiency in Wide Load Range," IEEE Transactions on Power Electronics, Vol. 28, No. 11, Nov. 2013. pp. 5074-5087.
- W. Fang, X.D. Liu and Y.F. Liu, "An New Digital Control Algorithm for Dual-Transistor Forward Converter" IEEE Transactions on Power Electronics, Vol. 9, No. 4, Nov. 2013. pp. 2074-2081.
- L. Wang, Z. Hu, Y.F. Liu, Y. Pei and X. Yang, "Multipermeability Inductors for Increasing the Inductance and Improving the Efficiency of High-Frequency Converters," IEEE Transactions on Power Electronics, Vol. 28, No. 9, Sept. 2013. pp. 4402-4413.
- L. Wang, Z. Hu and Y.F. Liu, Y. Pei, X. Yang, Z. Wang , "A Horizontal-Winding Multipermeability LTCC Inductor for a Low-profile Hybrid DC/DC Converter," IEEE Transactions on Power Electronics, Vol. 28, No. 9, Sept. 2013. pp. 4365-4375.
- Z. Zhang, P. Xu and Y.F. Liu, "Adaptive Continuous Current Source Drivers for 1-MHz Boost PFC Converters," IEEE Transactions on Power Electronics, Vol. 28, No. 5, May. 2013, pp. 2457-2467.
- L. Jia and Y.F. Liu, "Low Cost Microcontroller Based Implementation of Robust Voltage Based Capacitor Charge Balance Control Algorithm,"IEEE Transactions on Industrial Informatics, Vol. 9, No. 2, May 2013. pp. 869-879.
- L. Jia, Z. Hu, Y.F. Liu and P.C. Sen, "Predictable Auxiliary Switching Strategy to Improve Unloading Transient Response Performance for DC-DC Buck Converter," IEEE Transactions on Industrial Applications, Vol. 49, No. 2, March/April 2013. pp. 931-941.
- L. Jia and Y.F. Liu, "Voltage-Based Charge Balance Controller Suitable for Both Digital and Analog Implementation,"IEEE Transactions on Power Electronics, Vol. 28, No. 2, Feb. 2013, pp. 930-944.
- E. Meyer and Y.F. Liu, "Digital Charge Balance Controller With an Auxiliary Circuit for Improved Unloading Transient Performance of Buck Converters," IEEE Transactions on Power Electronics, Vol. 28, No. 1, Jan. 2013, pp. 357-370.
- A. Elnady, Y.F. Liu, "A Practical Solution for the Current and Voltage Fluctuation in Power Systems", IEEE Transactions on Power Delivery, Vol. 27, No. 3, July 2012. pp. 1339-1349.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, "Adaptive Current Source Drivers for Efficiency Optimization of High-Frequency Synchronous Buck Converters," IEEE Transactions on Power Electronics, Vol. 27, No. 5, May. 2012, pp. 2462-2470.
- E. Meyer, Z. Zhang and Y.F. Liu, "Digital Charge Balance Controller to Improve the Loading/Unloading Transient Response of Buck Converters," IEEE Transactions on Power Electronics, Vol. 27, No. 3, March. 2012, pp. 1314-1326.
- J. Fu, Z. Zhang, Y.F. Liu, P.C. Sen and L.S. Ge, "A New High Efficiency Current Source Driver With Bipolar Gate Voltage," IEEE Transactions on Power Electronics, Vol. 27, No. 2, Feb. 2012, pp. 985-997.
- J. Fu, Z. Zhang, Y.F. Liu and P.C.Sen, "MOSFET Switching Loss Model and Optimal Design of Current Source Driver Considering the Current Diversion Problem," IEEE Transactions on Power Electronics, Vol. 27, No. 2, Feb. 2012, pp. 998-1012.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, "Switching Loss Analysis Considering Parasitic Loop Industance With Current Source Drivers for Buck Converters," IEEE Transactions on Power Electronics, Vol. 26, No. 7, July. 2011, pp. 1815-1819.
- Z. Zhang, E. Meyer, Y.F. Liu and P.C. Sen, "A Nonisolated ZVS Self-Driven Current Tripler Topology for Low-Voltage and High-Current Applications," IEEE Transactions on Power Electronics, Vol. 26, No. 2, Feb. 2011, pp. 512-522.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, "Discontinuous-Current-Source Drivers for High-Frequency Power MOSFETs," IEEE Transactions on Power Electronics, Vol. 25, No. 7, July. 2010, pp. 1863-1876.
- E. Meyer, Z. Zhang and Y.F. Liu, "Controlled Auxiliary Circuit to Improve the Unloading Transient Response of Buck Converters," IEEE Transactions on Power Electronics, Vol. 25, No. 4, Apr. 2010, pp. 806-819.
- Z. Zhang, E. Meyer, Y.F. Liu and P.C. Sen, "A 1-MHz, 12-V ZVS Nonisolated Full-Bridge VRM With Gate Energy Recovery," IEEE Transactions on Power Electronics, Vol. 25, No. 3, Mar. 2010, pp. 624-636.
- Y. F. Liu, E. Meyer, X. Liu, "Recent Developments in Digital Control Strategies for DC/DC Switching Power Converters,"invited paper, IEEE Transactions on Power Electronics, Vol. 24, No. 11, Nov 2009, pp.2567-2577.
- Y. F. Liu and W. Eberle, "Recent Developments in Switching Mode Power Supply Technologies," invited paper, IEEE Canadian Review, Fall 2009, pp. 9-13.
- Z. Zhang, W. Eberle, P.C. Sen and Y.F. Liu, "A Nonisolated ZVS Asymmetrical Buck Voltage Regulator Module With Direct Energy Transfer," IEEE Transactions on Industrial Electronics, Vol. 56, No. 8, August 2009, pp. 3096-3105.
- W. Eberle, Z. Zhang, Y.F. Liu, P.C. Sen, "A Practical Switching Loss Model for Buck Voltage Regulators", IEEE Transactions on Power Electronics, Vol. 24, No. 3, Mar. 2009, pp. 700-713.
- G. Feng, E. Meyer, Y.F. Liu, "A Digital Two-Switching-Cycle Compensation Algorithm for Input-Voltage Transients in DC-to-DC Converters", IEEE Transactions on Power Electronics, Vol. 24, No. 1, Jan. 2009, pp. 181-191.
- Z. Zhang, W. Eberle, P. Lin, Y.F. Liu, P.C. Sen, "A 1-MHz High-Efficiency 12-V Buck Voltage Regulator With a New Current-Source Gate Driver", IEEE Transactions on Power Electronics, Vol. 23, No. 6, Nov. 2008, pp. 2817-2827.
- S. Ye, E. Meyer and Y.F. Liu, "A Novel Two Phase Nonisolated Full Bridge With Shared Primary Switches", IEEE Transactions on Power Electronics, Vol. 23, No. 5, Sept. 2008, pp. 2363-2376.
- E. Meyer, Z. Zhang and Y.F. Liu, "An Optimal Control Method for Buck Converters Using a Practical Capacitor Charge Balance Technique", IEEE Transactions on Power Electronics, Vol. 23, No. 4, July 2008, pp. 1802-1812.
- W. Eberle, P.C. Sen and Y.F. Liu, "A New Resonant Gate Drive Circuit with Efficient Energy Recovery and Low Conduction Loss", IEEE Transactions on Industrial Electronics, Vol. 55, No. 5, May 2008, pp. 2213-2221.
- Z. Yang, S. Ye, and Y.F. Liu, "A New Dual Channel Resonant Gate Drive Circuit for Low Gate Drive Loss and Low Switching Loss", IEEE Transactions on Power Electronics, Vol. 23, No. 3, May 2008, pp. 1574-1583.
- A. Elnady, A. Noureldin and Y.F. Liu, "Power-Quality Improvement Using Wiener Filters Based On a Modular Compensating Strategy", IEEE Transactions on Power Delivery, Vol. 23, No. 2, April 2008, pp. 841-849.
- W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Current Source Gate Driver Achieving Switching Loss Savings and Gate Energy Recovery at 1-MHz," IEEE Transactions on Power Electronics, Vol. 23, No. 2, Mar. 2008, pp. 678-691.
- Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "Optimal Design of a Resonant Gate Driver for Buck Converter Based on a New Analytical Loss Model," IEEE Transactions on Power Electronics, Vol. 23, No. 2, Mar. 2008, pp. 653-666.
- Y. Han and Y.F. Liu, "A Practical Transformer Core Loss Measurement Scheme for High-Frequency Power Converter", IEEE Transactions on Industrial Electronics, Vol. 55, No. 2, Feb. 2008, pp. 941-948.
- S. Ye, W. Eberle and Y.F. Liu, "A Novel Non-Isolated Full Bridge Topology for VRM Applications", IEEE Transactions on Power Electronics, Vol. 23, No. 1, Jan. 2008, pp. 427-437.
- A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A Design Method for PI-Like Fuzzy Logic controllers for DC-DC Converter", IEEE Transactions on Industrial Electronics, Vol. 54, No. 5, Oct. 2007, pp. 2688-2696.
- Y. Han, W. Eberle and Y.F. Liu, "A Practical Copper Loss Measurement Method for the Planar Transformer in High-Frequency Switching Converters", IEEE Transactions on Industrial Electronics, Vol. 54, No. 4, August 2007, pp. 2276-2287.
- G. Feng, E. Meyer, and Y.F. Liu, "A New Digital Control Algorithm to Achieve Optimal Dynamic Performance in DC-to-DC Converters", IEEE Transactions on Power Electronics, July 2007, Volume 22, Number 4, pp. 1489-1498.
- Z. Yang, S. Ye, and Y.F. Liu, "A New Resonant Gate Drive Circuit for Synchronous Buck Converter", IEEE Transactions on Power Electronics, July 2007, Volume 22, Number 4, pp. 1311-1320.
- W. Zhang, Y.F. Liu, and B. Wu, "A New Duty Cycle Control Strategy for Power Factor Correction and FPGA Implementation", IEEE Transactions on Power Electronics, Nov 2006, Volume 21, Number 6, pp. 1745-1753.
- W. Zhang, Y.F. Liu, and B. Wu, "New Digital Control Method for Power Factor Correction", IEEE Transactions on Industrial Electronics, June 2006, Volume 53, Number 3, pp. 987-990.
- W. Zhang, G. Feng, Y.F. Liu, and B. Wu, "A Digital Power Factor Correction (PFC) Control Strategy Optimized for DSP", IEEE Transactions on Power Electronics, Nov 2004, Volume 19, Number 6, pp. 1474-1486.
- G. Feng, Y.F. Liu and L. Huang, "A New Robust Algorithm to Improve the Dynamic Performance on the Speed Control of Induction Motor Drive", IEEE Transactions on Power Electronics, November 2004, Vol.19, No.6, pp. 1614-1627.
- S. Ye, W. Eberle and Y.F. Liu, "A Novel EMI Filter Design Method for Switching Power Supplies", IEEE Transactions on Power Electronics, Nov 2004, Volume 19, No. 6, pp. 1668-1678.
- Y. Xi, P. Jain, Y.F. Liu and R. Orr, "A Self Core Reset and Zero Voltage Switching Forward Converter Topology", IEEE Transactions on Power Electronics, Vol.15, No.6, November 2000, pp. 1192-1203.
- G. Moschopoulos, P. Jain, Y.F. Liu and G. Joos, "A Zero-Voltage Switched PWM Boost Converter with an Energy Feedforward Auxiliary Circuit", IEEE Transactions on Power Electronics, Vol. 14, No. 4, July 1999, pp. 653-662.
- Y.F. Liu and P.C. Sen, "New Class-E DC-DC Converter Topologies with Constant Switching Frequency", IEEE Transactions on Industry Applications, Vol.32, No.4, July/August 1996, pp. 961-969
- Y.F. Liu and P.C. Sen, "Large Signal Modeling of Hysteretic Current-Programmed Converters", IEEE Transactions on Power Electronics, Vol.11, No.3, May 1996, pp.423-430.
- Y.F. Liu and P.C. Sen, "Source Reactance Lossless Switch (SRLS) for Soft-Switching Converters with Constant Switching Frequency", IEEE Transactions on Circuits and Systems, Vol.43, No.4, April 1996, pp. 301-312.
- Y.F. Liu and P.C. Sen, "A Novel Resonant Converter Topology for DC-to-DC Power Supply", IEEE Transactions on Aerospace and Electronic Systems, Vol.31, No.4, October 1995, pp. 1301-1313.
- Y.F. Liu and P.C. Sen, "A Novel Method to Achieve Zero-Voltage Regulation in Buck Converter", IEEE Transactions on Power Electronics, Vol.10, No.3, May 1995, pp. 292-301.
- Y.F. Liu, P.C. Sen and S. Huang, "Function Control - A Novel Strategy to Achieve Improved Performance of the DC-to-DC Switching Regulators", IEEE Transactions on Industrial Electronics, Vol.42, No.2, April 1995, pp. 186-191.
- Y.F. Liu and P.C. Sen, "A General Unified Large-Signal Model for Current Programmed DC-to-DC Converters", IEEE Transactions on Power Electronics, Vol.9, No.4, July 1994, pp. 414-424

**Conference Papers**

**Conference Papers**

- H. Wang, S. Burton, Y.F. Liu, P.C. Sen and J.M. Guerrero "A Systematic Method to Synthesize New Transformerless Full-bridge Grid-tied Inverters" in IEEE Energy Conversion Congress & Expo (ECCE) 2014, Pittsburgh, Pennsylvania, USA, June 2014, pp. 2760-2766.
- Y. Qiu, H. Wang, L. Wang, Y.F. Liu and P.C. Sen "Electrolytic-Capacitor-Less High-Power LED Driver" in IEEE Energy Conversion Congress & Expo (ECCE) 2014, Pittsburgh, Pennsylvania, USA, June 2014, pp. 3612-3619.
- P. Fang and Y.F. Liu, "An Electrolytic Capacitor-Free Single Stage BuckBoost LED Driver and its Integrated Solution" in Applied Power Electronics Conference and Exposition (APEC) 2014, Fort Worth, Texas, USA, 2014, pp. 1394-1401.
- P. Fang and Y.F. Liu, "Single Stage Primary Side Controlled Offline Flyback LED Driver with Ripple Cancellation" in Applied Power Electronics Conference and Exposition (APEC) 2014, Fort Worth, Texas, USA, 2014, pp. 3323-3328.
- P. Fang and Y.F. Liu, "A Innovative Current Sensor-less Continuous Conduction Mode PFC Control" in IEEE Energy Conversion Congress & Expo (ECCE) 2013, Denver, Colorado, USA, September 2013, pp. 2155-2161.
- P. Fang, B. White, C. Fiorentino and Y.F. Liu, "Zero Ripple Single Stage AC-DC LED Driver with Unity Power Factor" inIEEE Energy Conversion Congress & Expo (ECCE) 2013, Denver, Colorado, USA, September 2013, pp. 3452-3458.
- Z. Hu, , L. Wang, Y.F. Liu and P.C. Sen, "Bang-Bang Charge Control for LLC Resonant Converters" in IEEE Energy Conversion Congress & Expo (ECCE) 2013, Denver, Colorado, USA, September 2013, pp.140-146.
- Z. Hu, Y.F. Liu and P.C. Sen, "Cycle-by-Cycle Average Input Current Sensing Method for LLC Resonant Topologies," inIEEE Energy Conversion Congress & Expo (ECCE) 2013, Denver, Colorado, USA, September 2013, pp. 167-174.
- M. Shepertycky, J.T. Zhang, Y.F. Liu and Q. Li, "Development of an Energy Harvesting Backpack and Performance Evaluation," in IEEE International Conference on Rehabilitation Robotics (ICORR) 2013, Seattle, Washington, USA, June 2013.
- C. Fiorentino, Z. Hu and Y.F. Liu, "Improving the Light Load Efficiency and THD of PFC Converters using a Line Cycle Skipping Method," in IEEE Workshop on Control and Modeling for Power Electronics (COMPEL) 2013, Salt Lake City, Utah, USA, June 2013.
- Z. Hu, Y. Qiu and Y.F. Liu, "Digital Implementation of Load Sharing Method for Interleaved LLC Converters," in IEEE Workshop on Control and Modeling for Power Electronics (COMPEL) 2013, Salt Lake City, Utah, USA, June 2013.
- C. Fiorentino, Z. Hu and Y.F. Liu, "A Line Cycle Skipping Method to Improve the Light Load Efficiency and THD of PFC Converters" in Applied Power Electronics Conference and Exposition (APEC) 2013, Long Beach, California, USA, 2013, pp. 368-373.
- Z. Hu, Y. Qiu, Y.F. Liu and P.C. Sen, "An Interleaving and Load Sharing Method for Multiphase LLC Converters" in Applied Power Electronics Conference and Exposition (APEC) 2013, Long Beach, California, USA, 2013, pp. 1421-1428.
- Y. Zhang, X.F. He, Z. Zhang and Y.F. Liu, "A Hybrid Control Method for Photovoltaic Grid-Connected Interleaved Flyback Micro-Inverter to Achieve High Efficiency in Wide Load Range," in Applied Power Electronics Conference and Exposition (APEC) 2013, Long Beach, California, USA, 2013, pp. 751-756.
- Z. Zhang, F.F. Li, F. Zhang and Y.F. Liu, "A Dual-Channel Isolated Resonant Gate Driver for Low Gate Drive Loss in ZVS Full-Bridge Converters," in Applied Power Electronics Conference and Exposition (APEC) 2013, Long Beach, California, USA, 2013, pp. 31-37.
- L. Wang, Z. Hu, Y.F. Liu, Y. Pei and X. Yang, "Design of Multi-permeability Distributed Air-gap Inductors" in IEEE Energy Conversion Congress & Expo (ECCE) 2012, Raleigh, North Carolina, USA, 2012 pp. 3285-3292.
- Z. Hu, Y.J. Qiu, L. Wang and Y.F. Liu, "An Interleaved LLC Resonant Converter Operating at Constant Switching Frequency" in IEEE Energy Conversion Congress & Expo (ECCE) 2012, Raleigh, North Carolina, USA, 2012 pp. 3541-3548.
- Z. Zhang, X.F. He, X. Ren and Y.F. Liu, "Multi-Mode Control for Photovoltaic Grid-connected Interleaved Flyback Micro-inverters to Achieve High Efficiency in Wide Load Range" in IEEE Energy Conversion Congress & Expo (ECCE) 2012, Raleigh, North Carolina, USA, 2012 pp. 2433-2438.
- Z. Zhang, P. Xu, X. Ren, Y.F. Liu and P.C. Sen, "Optimization and Comparison of Continuous and Discontinuous Current Source Drivers for MHz Boost PFC Converters" in Applied Power Electronics Conference and Exposition (APEC) 2012, Orlando, Florida, USA, 2012, pp. 1165-1171.
- L. Wang, Y. Pei, X. Yang, Z. Wang and Y.F. Liu, "A Horizontal-winding Multi-permeability Distributed Air-gap Inductor" in Applied Power Electronics Conference and Exposition (APEC) 2012, Orlando, Florida, USA, 2012, pp. 994-1001.
- Z. Zhang, P. Xu, Y.F. Liu and P.C. Sen, "Adaptive Current Source Drivers for Efficiency Optimization of High Frequency Synchronous Buck Converters," in IEEE Energy Conversion Congress & Expo (ECCE) 2011, Phoenix, Arizona, USA, 2011, pp. 1181 – 1187.
- P. Xu, Z. Zhang, Y.F. Liu and P.C. Sen, "MHz Power Factor Correction with Adaptive Current Source Drivers," in IEEE Energy Conversion Congress & Expo (ECCE) 2011, Phoenix, Arizona, USA, 2011, pp. 2338 – 2344.
- P. Xu, Z. Zhang, Y.F. Liu and P.C. Sen, "Adaptive Discontinuous Current Source Driver to Achieve Switching Loss Reduction for MHz PFC Boost Converters," in IEEE Energy Conversion Congress & Expo (ECCE) 2011, Phoenix, Arizona, USA, 2011, pp. 1346-1352.
- L. Jia, Z. Hu, Y.F. Liu and P.C. Sen, "A Practical Control Strategy to Improve Unloading Transient Response Performance for Buck Converters," in IEEE Energy Conversion Congress & Expo (ECCE) 2011, Phoenix, Arizona, USA, 2011, pp. 397-404.
- Z. Zhang, P. Xu,Y.F. Liu and P.C. Sen, "Adaptive Current Source Drivers for MHz Power Factor Correction," in Applied Power Electronics Conference and Exposition (APEC) 2011, Fort Worth, Texas, USA, 2011, pp. 1456-1463.
- L. Jia, D. Wang, Y.F. Liu and P.C. Sen, "A Novel Analog Implementation of Capacitor Charge Balance Controller with a Practical Extreme Voltage Detector," in Applied Power Electronics Conference and Exposition (APEC) 2011, Fort Worth, Texas, USA, 2011, pp. 245-252.
- D. Wang, L. Jia, Y.F. Liu and P.C. Sen, "An Improved Driving Method for Synchronous Rectifier using Drain-Source Voltage Sensing," in Applied Power Electronics Conference and Exposition (APEC) 2011, Fort Worth, Texas, USA, 2011, pp. 1433-1438.
- Z. Hu, Y.F. Liu and T.H. Yeap, "High-Accuracy Digital controlled isolated power supply with low data transfer requirements," in Applied Power Electronics Conference and Exposition (APEC) 2011, Fort Worth, Texas, USA, 2011, pp. 338-345.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, "Comparison of Continuous and Discontinuous Current Source Drivers for High Frequency Applications," in IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA, pp. 2434-2440.
- Z. Hu, T.H. Yeap and Y.F. Liu, "Multi-Resolution Feedback to Minimize Communication Data and Improve Output Accuracy," in IEEE Energy Conversion Congress & Expo.(ECCE) 2010, Atlanta, Georgia, USA, pp. 787-795.
- Z. Hu, Y.F. Liu and T.H. Yeap, " An Efficient Communication Protocol for Single- and Multi-Module Isolated Digital Power Supplies Using a Single Pulse-Transformer," in IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA, pp. 1997-2003.
- L. Jia , D. Wang, E. Meyer, Y.F. Liu and P.C. Sen, " A Novel Parameter-Independent Digital Optimal Control Algorithm for Dc-Dc Buck Converters Based on Parabolic Curve Fitting," in IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA, pp. 500-507.
- L. Jia , D. Wang, J. Fu, Y.F. Liu and P.C. Sen, " A Novel Digital Capacitor Charge Balance Control Algorithm with a Practical Extreme Voltage Detector," in The IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA, pp. 514-521.
- D. Wang, L. Jia , J. Fu, Y.F. Liu and P.C. Sen, " A New Driving Method for Synchronous Rectifiers of LLC Resonant Converter with Zero-crossing Noise Filter," in The IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA. pp. 249-255.
- J. Fu, Z. Zhang, L. Jia , Y.F. Liu and P.C. Sen, " A New Inductorless Bipolar Gate Driver for Control FET of High Frequency Buck Converters," in the IEEE Energy Conversion Congress & Expo (ECCE) 2010, Atlanta, Georgia, USA . pp. 2422-2429.
- Y.F. Liu and L. Jia " Performance Enhancement with Digital Control Technologies for DC/DC Switching Converters," in the 12th IEEE Workshop on Control and Modeling for Power Electronics (COMPEL 2010), University of Colorado, Boulder, Colorado, USA. pp. 1-8.
- E. Meyer, D. Wang, L. Jia and YF. Liu, "Digital Charge Balance Controller with an Auxiliary Circuit for Superior Unloading Transient Performance of Buck Converters," in IEEE Applied Power Electronics Conference and Exposition (APEC), Palm Springs, California, February 2010, pp. 124-131.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, " Switching Loss Analysis Considering Parasitic Loop Inductance with Current Source Drivers for Buck Converters", IEEE Applied Power Electronics Conference and Exposition (APEC), Palm Springs, California, February 2010, pp. 1482-1486.
- J. Fu, Z. Zhang, A. Dickson, Y.F. Liu and P.C. Sen, " Accurate Switching Loss Model and Optimal Design of A Current Source Driver Considering the Current Diversion Problem", IEEE Applied Power Electronics Conference and Exposition (APEC), Palm Springs, California, February 2010, pp. 702-709.
- E. Meyer, Z. Zhang, Y.F. Liu, "Digital Charge Balance Controller with Low Gate Count to Improve the Transient Response of Buck Converters", IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, California, September 2009, pp. 3320-3327.
- Z. Zhang, E. Meyer, Y.F. Liu and P.C. Sen, "A Non-Isolated ZVS Self-Driven Current Tripler Topology for Low Voltage and High Current Applications", IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, California, September 2009, pp. 1983-1990.
- Z. Zhang, J. Fu, Y.F. Liu and P.C. Sen, "A New Discontinuous Current Source Driver for High Frequency Power MOSFETs", IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, California, September 2009, pp. 1655-1662.
- J. Fu, Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "A High Efficiency Current Source Driver with Negative Gate Voltage for Buck Voltage Regulators", IEEE Energy Conversion Congress and Exposition (ECCE), San Jose, California, September 2009, pp. 1663-1670.
- E. Meyer, Z. Zhang, Y.F. Liu, "Controlled Auxiliary Circuit with Measured Response for Reduction of Output Voltage Overshoot in Buck Converters", IEEE Applied Power Electronics Conference (APEC), Washington, DC, February 2009, pp. 1367-1373.
- Z. Zhang, E. Meyer, Y.F. Liu, P.C. Sen, "A New ZVS Non-Isolated Full-Bridge Voltage Regulator Module with Gate Energy Recovery", IEEE Applied Power Electronics Conference (APEC), Washington, DC, February 2009, pp. 1469-1475.
- E. Meyer, Z. Zhang and Y.F. Liu, "Controlled Current Source Circuit (CCSC) for Reduction of Output Voltage Overshoot in Buck Converters", IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 815-820.
- W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Simple Switching Loss Model for High Switching Frequency Voltage Regulators with Current Source Gate Drive," IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 3780-3786.
- Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "A Novel Non-Isolated ZVS Asymmetrical Buck Converter for 12V VRs," IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 974-978.
- Z. Zhang,W. Eberle, Y.F. Liu and P.C. Sen, "A New Hybrid Gate Drive Scheme for Buck Voltage Regulators," IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 2498-2504.
- E. Meyer and Y.F. Liu, "A Practical Minimum Time Control Method for Buck Converters Based on Capacitor Charge Balance", IEEE Applied Power Electronics (APEC), Austin, Texas, USA, February 2008, pp. 10-16.
- S. Ye, E. Meyer and Y.F. Liu, "A Novel Non-Isolated Two-Phase Full Bridge Topology for VRM Applications", IEEE Applied Power Electronics (APEC), Austin, USA, February 2008, pp. 24-30.
- S. Ye, E. Meyer and Y.F. Liu, "A Novel Isolated Two-Phase Full Bridge Topology for VRM Applications", IEEE Applied Power Electronics Conference (APEC), Austin, Texas, USA, February 2008, pp. 353-359.
- W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Simple Switching Loss Model for High Switching Frequency DC-DC Converters," IEEE Applied Power Electronics Conference (APEC), Austin, Texas, USA, February 2008, pp. 36-42.
- Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "A New Current-Source Gate Driver for a Buck Voltage Regulator," IEEE Applied Power Electronics Conference (APEC), Austin, Texas, USA, February 2008, pp. 1433-1439.
- W. Eberle, Z. Zhang, Y.F. Liu, and P.C. Sen "A High Efficiency Synchronous Buck VRM with Current Source Gate Driver," IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, FL, USA, pp. 21-27. PESC presentation.
- E. Meyer and Y.F. Liu, "A Quick Capacitor Charge Balance Control Method to Achieve Optimal Dynamic Response for Buck Converters," IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 1549-1555. PESC presentation
- . Zhang, W. Eberle, Z. Yang, Y.F. Liu and P.C. Sen, "Optimal Design of Current Source Gate Driver for a Buck Voltage Regulator Based on a New Analytical Loss Model," IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 1556-1562. PESC presentation
- A. Elnady, A. Noureldin and Y.F. Liu, "Implementation of the Wiener Filter for Extracting Power Quality Disturbances" IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, Florida, USA, pp. 1116-1120.
- E. Meyer, G. Feng and Y.F. Liu, "Novel Digital Controller Improves Dynamic Response and Simplifies Design Process of Voltage Regulator Module" IEEE Applied Power Electronics Conference (APEC), 2007, Anaheim, California, USA, pp. 1447-1453, APEC poster
- S. Ye, W. Eberle and Y.F. Liu, "A Novel Non-Isolated Full Bridge Topology for VRM Applications," IEEE Applied Power Electronics Conference (APEC), 2007, Anaheim, California, USA, pp. 134-140. APEC presentation
- W. Eberle, Y.F. Liu and P.C. Sen, "A Resonant Gate Drive Circuit with Reduced MOSFET Switching and Gate Losses", IEEE Industrial Electronics Society Conference (IECON), 2006, Paris, France, pp. 1745-1750. IECON presentation
- K.Xu, Y.F. Liu and P.C. Sen, " A New Resonang Gate Drive Circuit Utilizing Leakage Inductance of Transformer", IEEE Industrial Electronics Society Conference (IECON), 2006, Paris, France, pp. 1933-193.7, IECON presentation
- G. Feng, E. Meyer and Y.F. Liu, "High Performance Digital Control Algorithms For DC-DC Converters Based on the Principle of Capacitor Charge Balance", IEEE Power Electronics Specialists Conference (PESC), 2006, Jeju, South Korea, pp. 1740-1746, PESC presentation
- Z. Zhang, Z. Yang, S. Ye and Y.F. Liu, "Topology and Analysis of a New Resonant Gate Driver", IEEE Power Electronics Specialists Conference (PESC), 2006, Jeju, South Korea, pp. 1453-1459. PESC presentation
- W. Eberle, Y.F. Liu and P.C. Sen, "A Simple Large Signal Model for Isolated DC-DC Converters", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Ottawa, Canada, May 2006, pp. 1267-1270. CCECE presentation
- W. Eberle, P.C. Sen and Y.F. Liu, "A Novel High Performance Resonant Gate Drive Circuit with Low Circulating Current", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, Texas, USA, pp. 324-330. APEC presentation
- Z. Yang, S. Ye and Y.F. Liu, "A New Resonant Gate Drive Circuit for Synchronous Buck Converter", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, Texas, USA, pp. 52-58. APEC presentation
- Z. Yang, S. Ye and Y.F. Liu, "A New Dual Channel Resonant Gate Drive Circuit for Synchronous Rectifiers", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, Texas, USA, pp. 756-762. APEC presentation
- G. Feng, W. Eberle and Y.F. Liu, "A Digital Control Algorithm for DC-DC Converters Under Input Voltage Changes", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, Texas, USA, pp. 1430-1436. APEC poster
- W. Eberle, P.C. Sen and Y.F. Liu, "A New Resonant Gate Drive Circuit with Efficient Energy Recovery and Low Conduction Loss", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 650-655. IECON presentation
- K. Xu, Y.F. Liu and P.C. Sen, "A New Resonant Gate Drive Circuit with Centre-Tapped Transformer", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 639-644. IECON presentation
- A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Analysis and Design Method for Fuzzy Logic Controllers Used in Power Converters", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 1006-1011. IECON presentation
- Y.F. Liu and P.C. Sen, Invited Paper, "Digital Control of Switching Power Converters", International Conference on Control Applications (ICC), 2005, pp. 635-640.
- Z. Yang, S. Ye and Y.F. Liu, "A New Transformer-Based Non-Isolated topology Optimized for VRM Application", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 447-453.
- S. Ye, W. Eberle, Z. Yang and Y. F. Liu, " A New Non-Isolated Full Bridge Topology for Low Voltage High Current VRM Applications", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 389-395.
- G. Feng, W. Eberle and Y. F. Liu, "A New Digital Control Algorithm to Achieve Optimal Dynamic Performance in DC-to-DC Converters", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 2744-2749.
- W. Zhang, G. Feng, Y.F. Liu and B. Wu, "A New Duty Cycle Parallel Control Method and FPGA Implementation for AC-DC Converters with Power Factor Correction (PFC)", IEEE Applied Power Electronics Conference (APEC), 2005, pp. 805-810.
- Z. Yang, S. Ye and Y.F. Liu, " A Novel Non-Isolated Half Bridge DC-DC Converter", IEEE Applied Power Electronics Conference (APEC), 2005, pp. 301-307.
- Y.W. Lu and Y.F. Liu, "A Large-Signal Dynamic Model for Single-Phase AC-DC Converter with Power Factor Correction", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 1057-1063.
- Y. Han and Y.F. Liu, "New Measurement Methods to Characterize Transformer Core Loss and Copper Loss in High-Frequency Switching Mode Power Supply", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 1695-1701.
- W. Zhang, G. Feng, Y.F. Liu, and B. Wu, " A Direct Duty Cycle Calculation Algorithm for Digital Power Factor Correction (PFC) Implementation", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 2326-2332.
- A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Sliding Mode-Like Control Method for Buck Converter", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 3688-3693.
- A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Design Method for PI-like Fuzzy Logic Controllers Applied to DC-to-DC Converter", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 3751-3757.
- G. Feng, W. Zhang and Y.F. Liu, " A New Current Feedback Fuzzy Logic Controller with Extended State Observer for DC-to-DC Converters", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 1771-1777.
- W. Zhang, G. Feng, Y.F. Liu and B. Wu, "DSP Implementation of Predictive Control Strategy for Power Factor Correction (PFC)", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 67-73.
- Eberle, Y. Han, Y.F. Liu and S. Ye, "An Overall Study of the Asymmetrical Half-Bridge with Unbalanced Turns and Current Mode Control", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 1083-1089.
- Y.W. Lu, G. Feng and Y.F. Liu, " A Large Signal Dynamic Model for DC-to-DC Converters with Average Current Control", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 797-803.
- W. Zhang, G. Feng, Y.F. Liu and B. Wu, "Analysis and Implementation of a New PFC Digital Control Method", IEEE Power Electronics Specialists Conference (PESC), 2003, pp. 335-340.
- S. Ye and Y.F. Liu, "EMI Filter Design Method for Communication Power Sub-System", IEEE Applied Power Electronics Conference (APEC), 2003, 2003, pp. 483-489.
- G. Feng, W. Zhang and Y.F. Liu, " An Adaptive Current Mode Fuzzy Logic Controller for DC-to-DC Converters", IEEE Applied Power Electronics Conference (APEC) 2003, pp. 983-989.
- W. Zhang, G. Feng, Y.F. Liu and B. Wu, "A New Predictive Control Strategy for Power Factor Correction", IEEE Applied Power Electronics Conference (APEC), 2003, pp. 403-409.
- G. Feng, W. Zhang and Y.F. Liu, "A New Adaptive Fuzzy Logic Control Method for DC-to-DC Converter", IEEE Industrial Electronics Society Conference (IECON), 2002, pp. 1208-1213.
- W. Zhang, G. Feng, Y.F. Liu and Bin Wu, " A New Power Factor Correction (PFC) Control Method Suitable for Low Cost DSP", IEEE International Telecommunications Energy Conference (INTELEC), 2002, pp. 407-414.
- W. Eberle and Y.F. Liu, "A Zero Voltage Switching Asymmetrical Half-Bridge DC/DC Converter With Unbalanced Secondary Windings For Improved Bandwidth", IEEE Power Electronics Specialists Conference (PESC), 2002, pp. 1829-1834.
- G. Feng, Y.F. Liu and L. Huang, "A New Robust Controller to Improve the Dynamic Performance of Induction Motors", IEEE Power Electronics Specialists Conference (PESC), 2001, pp. 778 -783.
- G. Feng and Y.F. Liu, " An Improved Nonlinear Control Strategy for Induction Motor Drive", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2001, pp. 7-12.
- Y. Zhang, P.C. Sen and Y.F. Liu, "A Novel Zero Voltage Switched (ZVS) Buck Converter Using Coupled Inductor", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2001, pp. 357-362.
- Y.F. Liu and P. Jain, "A New Current Sensing Scheme for Zero-Voltage Switching Phase-Shift Bridge Converter", IEEE International Telecommunications Energy Conference (INTELEC), 2000, pp. 567-573.
- Y. Xi, P. Jain and Y.F. Liu, " A Precisely Regulated Multiple Output Forward Converter Topology", IEEE Applied Power Electronics Conference (APEC), 2000, pp. 986-992.
- Y. Xi, P. Jain, Y.F. Liu and R. Orr, "A Zero Voltage Switching and Self-Reset Forward Converter Topology", IEEE Applied Power Electronics Conference (APEC), 1999, pp. 827-833.
- S. Mangat, Y. Xi, P. Jain and Y.F. Liu, "A Modified Asymmetrical Pulse-Width-Modulated Resonant DC/DC Converter Topology", IEEE Power Electronics Specialists Conference (PESC), 1998, pp. 662-668.
- Y. Xi, P. Jain, G. Joos and Y.F. Liu, " An Improved Zero Voltage Switching Flyback Converter Topology", IEEE Power Electronics Specialists Conference (PESC), 1998, pp. 923-929.
- G. Moschopoulos, P. Jain, G. Joos and Y.F. Liu, "A Single Stage Vero Voltage Switched PWM Full-Bridge Converter with Power Factor Correction", IEEE Applied Power Electronics Conference (APEC), 1997, pp. 457-463.
- G. Moschopoulos, P. Jain, G. Joos and Y.F. Liu, "A Zero-Voltage Switched PWM Boost Converter with an Energy Feedforward Auxiliary Circuit", IEEE Power Electronics Specialists Conference (PESC), 1996, pp. 76-82.
- Y.F. Liu and P.C. Sen, " A General Unified Large Signal Model for Current Programmed DC-To-DC Converter", IEEE Industry Application Society Conference, 1994, pp. 1106-1112.
- Y.F. Liu and P.C. Sen, "New Class-E DC-to-DC Converter Topologies with Constant Switching Frequency", IEEE Industry Application Society Conference, 1993, pp. 1090-1097.
- Y.F. Liu and P.C. Sen, "Source Reactance Lossless Switch (SRLS) for Soft Switching Converters with Constant Switching Frequency", IEEE Industry Application Society Conference, 1992, pp. 710-719.
- Y.F. Liu, P.C. Sen and S. Huang, " Function Control - A novel Strategy to Achieve Improved Performance of the DC-to-DC Switching Regulators", IEEE Industry Application Society Conference, 1991, pp. 971-976.
- H. Qu, Y.F. Liu and S. Huang, "Sliding-Mode Controlled Cuk Switching Regulator with Fast Response and First Order Dynamic Characteristic", IEEE Power Electronics Specialists Conference (PESC), 1989, pp. 124-129.
- Y.F. Liu and S. Huang, "Function Control and its Application in DC-DC Switching Regulator", IEEE Power Electronics Specialists Conference (PESC), 1988, pp. 377-383.