Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1998-06-18
1999-09-07
Nguyen, Matthew
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 34, H02M 545
Patent
active
059496649
ABSTRACT:
A current stiff power conversion system, such as a rectifier, inverter, or AC-to-AC converter is provided wherein power converter switching devices in the power conversion system may be switched at or near zero voltage conditions to minimize or eliminate switching losses and increase switching frequencies. Zero voltage switching conditions are achieved by providing a snubber capacitor across each switching device in the power conversion system, and connecting an active commutation unit, including an inductor and an active commutation unit switching device connected in series across DC bus lines in parallel with the bridge of power conversion switching devices. Zero voltage switching conditions for the power conversion switching devices are achieved by controlling the power conversion switching devices and the active commutation unit to establish a resonance between the snubber capacitors and the active commutation unit to drive the voltage across incoming switching devices in the power conversion system to at or near zero. Zero current switching of the active commutation unit switching device, and reduced switching device stress in the power conversion system, is achieved by controlling the power conversion switching devices to establish zero current switching conditions and a desired snubber driving voltage for the active commutation unit before the active commutation unit is turned on to establish the resonance condition. Since zero voltage switching conditions for the power conversion switching devices is achieved each switching cycle, the power conversion system may be controlled using a PWM control scheme.
REFERENCES:
patent: 4146921 (1979-03-01), Akamatsu
patent: 4428023 (1984-01-01), Maier
patent: 4697219 (1987-09-01), Mitsuoka
patent: 4730242 (1988-03-01), Divan
patent: 4757435 (1988-07-01), Wood et al.
patent: 4833584 (1989-05-01), Divan
patent: 4942511 (1990-07-01), Lipo et al.
patent: 4965709 (1990-10-01), Ngo
patent: 5027264 (1991-06-01), DeDoncker et al.
patent: 5412557 (1995-05-01), Lauw
patent: 5432695 (1995-07-01), Vlatkovic et al.
patent: 5483140 (1996-01-01), Hess et al.
patent: 5642273 (1997-06-01), Lai et al.
patent: 5710698 (1998-01-01), Lai et al.
patent: 5793622 (1998-08-01), Dahler et al.
P.D. Ziogas, Y.G., Kang, V.R. Sefanovic, "PWM control techniques for rectifier filter minimization", IEEE Trans. Ind. Applic., vol. 21, No. 5, Sep./Oct. 1985, pp. 1206-1213.
Heinz Willi Van Der Broeck, et al., "Analysis and Realization of a Pulsewidth Modulator Based on Voltage Space Vectors", IEEE Trans. Ind. App., vol 24, No. 1, Jan./Feb., 1988, pp. 142-150.
R.W. DeDoncker & J.P. Lyons, "The Auxiliary Resonant Commutated Pole Converter", IEEE IAS, 1990, pp. 1228-1235.
P.N. Enjeti, P.D. Ziogas, J.F. Lindsay, "A current source PWM inverter with instantaneous current control capability", IEEE Trans. Ind. Applic., vol. 27, No. 3, May/Jun. 1991, pp. 582-588.
B. Wu., S.B. Dewan, G.R. Slemon. "PWM-CSI inverter for induction motor drives", IEEE Trans. Ind. Applic., vol. 28, No. 1, Jan./Feb. 1992, pp. 64-71.
F. Leonardi, et al., "Soft-Switched PWM Converter with Inductive DC Filter", IEEE PCC '93 Conf. Record, Yokohama, 1993, pp. 123-128.
William McMurray, "Resonant Snubbers with Auxiliary Switches", IEEE Trans. Ind. App., vol. 29, No. 2, Mar./Apr., 1993, pp. 355-361.
Vlatko Vlatkovic, et al., "Soft-Transition Three-Phase PWM Conversion Technology", IEEE PESC '94, 1994, pp. 79-84.
J.R. Espinoza, G. Joos, "A current-source inverter fed induction motor drive system with reduced losses", IEEE IAS '95 Conf. Records, Orlando, 1995, pp. 45-51.
Steven C. Rizzo, et al., "Symmetric GTO and Snubber Component Characterization in PWM Current Source Inverters", IEEE APEC '96, 1996, pp. 613-619.
M.L. Gasperi, "Life prediction model for aluminum electrolytic capacitors", IEEE IAS '96 Conf. Records, San Diego, 1996, pp. 1347-1351.
Y. Xiao, B. Wu, S. Rizzo, R. Sotudeh, "A novel power factor control scheme for high power GTO current source converter", IEEE IAS '96 Conf. Record, San Diego, 1996, pp. 865-869.
B. J. Cardoso Filho, T.A. Lipo, "Space vector control and modulation issues in the passively clamped quasi-resonant inverter", IEEE IAS Annual Meeting Conf. Records, San Diego, 1996, pp. 1179-1185.
Bernet Steffen
Cardoso Filho Braz de J.
Lipo Thomas A.
Nguyen Matthew
Wisconsin Alumni Research Foundation
LandOfFree
Current stiff converters with resonant snubbers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current stiff converters with resonant snubbers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current stiff converters with resonant snubbers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1810601