Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1994-02-10
1996-03-12
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 40, 363 44, 363 84, 363 95, 307105, H02M 112
Patent
active
054991781
ABSTRACT:
A circuit is provided for generating a current that is a harmonic of the frequency of the utility system and which is of a selected amplitude and phase to reduce the total harmonic distortion of a system that converts alternating current to direct current, or vice versa. The DC signal is sampled and by controlling switches, a sinusoidal current at the desired harmonic is generated, and is provided to a neutral of a transformer that injects this current into the multiphase AC system used by the utility in a very low cost, easily controlled, and highly effective manner. In a second embodiment, the injection current is provided to a common junction of a magnetic device.
REFERENCES:
patent: 3979662 (1976-09-01), Klein
patent: 4053820 (1977-10-01), Peterson et al.
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4204264 (1980-05-01), Lipman
patent: 4224660 (1980-09-01), Mohan
patent: 4730243 (1988-03-01), Glennon
patent: 4967334 (1990-10-01), Cook et al.
patent: 4975822 (1990-12-01), Lipman
patent: 5345375 (1994-09-01), Mohan
"New Rectifier Circuits with Low Mains Pollution and Additional Low Cost Invertor for Energy Recover," Clemens Niermann et al, pp. 1131-1136, Aachen, Germany, Dec. 1989.
"Harmonic Reduction in Multiplex Converters by Triple-Frequency Current Injection," B. M. Bird et al., Proceedings of IEEE, vol. 116, No. 10, Oct. 1969, pp. 1730-1734.
"Generalized Method of Harmonic Reduction in A.C.=D.C. Convertors by Harmonic Current Injection," A. Ametani, Proceedings of IEEE, vol., 199, No. 7, Jul. 1972, pp. 857-864.
"Description and Prospective Applications of New Multi-Terminal HVDC System Concepts," L. Knudsen et al., pub. by Cigna, 112, Boulevard Haussmann, 75008 Paris, France, No. 14-201, 26 Aug.-Sep. 1990.
"Advances in Switched-Mode Power Conversion," Cuk and Middlebrook, Telasco Power Electronics Series, vol. II, Jun. 1981.
Selected pages from IEEE Transactions on Industrial Electronics, vol. 37, No. (Aug. 1990).
Selected pages from Power Electronics, Ned Mohan et al., published by John Wiley & Sons (Dec. 1989).
"Harmonic Reduction in Thyriston Converts by Harmonic Current Injection," A. Ametani, IEEE Transactions on Power Apparatus and Systems, vol. PAS-95, No. 2, Mar./Apr. 1976, pp. 441-449.
"Harmonic Reduction in D.C.-Ripple Reinjection," J. F. Baird et al., IEEE Proceedings, vol. 127, Pt. C., No. 5, Sep. 1980, pp. 294-303.
"Increasing the Pulse Number of AC-DC Convertors by Current Reinjection Techniques," J. Arrillaga et al., IEEE Transactions on Power Apparatus and Systems, vol. PAS-102, No. 8, Aug. 1983, pp. 2649-2655.
Regents of the University of Minnesota
Sterrett Jeffrey L.
LandOfFree
System for reducing harmonics by harmonic current injection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for reducing harmonics by harmonic current injection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for reducing harmonics by harmonic current injection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2105227