1. 4,001,660 "Regulating the Torque of an Induction Motor", January 4, 1977.

 

2. 4,019,105 "Controlled Current Induction Motor Drive" (with E. P. Cornell), April 19, 1977.

 

3. 4,088,934 "Means for Stabilizing an AC Electric Motor Drive System" (with J. D. D'Atre and A. B. Plunkett), May 9, 1978.

 

4. 4,112,339 "Measurement of Pulsating Torque in a Current Source Inverter Drive", Sept. 5, 1978.

 

5. 4,137,489 "Feedback Control for Reduction of Cogging Torque in Controlled Current AC Motor Drives", January 30, 1979.

 

6. 4,455,522 "Current Source Inverter Fed Induction Motor Drive", June 19, 1984.

 

7. 4,573,003 "AC Machine Optimized for Converter Operation” February 25, 1986.

 

8. 4,942,511 "Static Power Conversion Apparatus Using a High Frequency Series Resonant DC Link" (with Y. Murai), July 17, 1990.

 

9. 5,010,267 "Variable Speed Reluctance Machine with High Power Density" (with L.Y. Xu) , April 23, 1991.

 

10. 4,724,373 "Method and Apparatus for Flux and Torque Sensing in Electrical Machines"(with K.C. Chang) Feb. 9, 1988.

 

11. 5,304,882 "A New Class of Variable Reluctance Motors with Permanent Magnet Excitation", (with Y. Liao and F. Liang), April 19, 1994.

 

12. 5,376,851 "Variable Reluctance Motors with One or Two Full Pitch Windings", (with Y. Liao and F. Liang), December 27, 1994.

 

13. 5,334,923 "Motor Torque Control Method and Apparatus", (with R. Lorenz, T. Hung and J. Moreira), Aug. 2. 1994.

 

14. 5,448,149 “Indirect Rotor Position Sensor for a Sinusoidal Synchronous Reluctance Machine”, (with M. Ehsani, and M. Arefeen”, June 20, 1994.

 

15. 5,448,149 "Indirect Rotor Position Sensor for Sinusoidal Synchronous Reluctance Machine", (with M. Ehsani and M. Arafeen), Sept. 5, 1995.

 

16. 5,455,473 "Field Weakening for a Doubly Salient Motor with Stator Permanent Magnets", (with Y. Liao and F. Liang), Oct. 3, 1995

 

17. 5,455,385 "Variable Reluctance Drive System", (with F. Liang), Oct. 17, 1995.

 

18. 5,510,689 "Air Gap Flux Measurement Using Stator Third Harmonic Voltage", (with J. Moreira), Apr. 23, 1996.

 

19. 5,646,498 "Conducted Emission Radiation Suppression in Inverter Drives", (with E-K Zhong), July 8, 1997.

 

20. 5,650,707 "Inverter Controlled Induction Machine with an Extended Speed Range", (with M. Ossama), July 22, 1997.

 

21. 5,661,390 "Inverter-Fed Motor Drive with EMI Suppression", (with E.-K. Zhong), August 26, 1997.

 

22. 5,672,925 "Doubly Salient Variable Reluctance Machine with Stationary Permanent Magnets or Auxiliary Field Windings", (with Y. Liao and F. Liang), Sept. 30, 1997.

 

23. 5,825,112 “Doubly Salient Motor with Stationary Permanent Magnets”, (with Y. Liao and F. Liang), Oct 20, 1998.

 

24. 5,825,113 “Doubly Salient Permanent Magnet Motor with Field Weakening (or Boosting) Capability”, (with Y. Li), Oct. 20, 1998.

 

25. 5,841,644 “Passively Clamped Quasi-Resonant DC Link Converters”, (with Shaotong Chen), November 24, 1998.

 

26. 5,852,558 “Method and Apparatus for Reducing Common Mode Voltage in Multi-Phase Power Converters”, (with A. Julian and D. Divan), Dec 22, 1998.

 

27. 5,870,292 "Series Resonant Converter for Switched Reluctance Motor Drive", (with S.S. Park), February 9, 1999.

 

28. 5,949,664 “ Current Stiff Converters With Resonant Snubbers”, (with S. Bernet, B. Cardoso Filho), Sept. 7, 1999.

 

29. 6,005,788 “Hybrid Topology for Multilevel Power Conversion”, (with Madhav Manjrekar), Dec 21, 1999.

 

30. 6,031,738 “DC Bus Voltage Balancing and Control in Multilevel Inverters”, (with Gautam Sinha), February 29, 2000.

 

31. 6,097,582 “Short Circuit Protection of IGBTs and Other Power Switching Devices”, (with V. John and B.S. Suh), August 1, 2000.

 

32. 6,242,884 “Dual Stator Winding Induction Machine Drive”, (with Alfredo Munoz-Garcia), June 5, 2001.

 

33. 6,570,778 “Low-Cost Two-Speed Drive for a Single Phase Induction Machine”, (with M. Chomat), May 27, 2003.

 

34. 6,710,495 “Six Phase Induction Machine with Third Harmonic Current Injection”, with R. Lyra, March 23, 2004.

 

35. Pending - “Dual Bridge Matrix Converter”, with Lixiang Wei, Filed 6/20/2003.

 

36. 5,852,558 "Method and Apparatus for Reducing Common Mode Voltage in Multi-Phase Power Converters" 12/22/1999.

 

37. 6,208,185 B1 “High Performance Active Gate Drive for IGBTs” (with Vinod John and Bum-Seok Suh), 3/27/1999.

 

38. Pending - “Field Controlled Axial Flux Disc Machine 0- Dual Stataore Single RotorConcept.”, approved for Filing, May 23,2005.

 

39. 6,924,574 “Dual-Rotor, Radial-Flux, Toroidally-Wound, Permanent-Magnet Machine, (with Ronghai Qu), August 2, 2005.