Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1995-05-22
1996-11-19
Hecker, Stuart N.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363132, H02H 7122
Patent
active
055769438
ABSTRACT:
A resonant recovery circuit operates to discharge switching energy losses stored in a snubber capacitor associated with each pole of an inverter to return the discharged current to the DC supply by means of an inductor coupled to the resonant recovery switch. In a multiple pole inverter, the snubber capacitors associated with each of the pole's switching devices is sequentially discharged during the clock cycle of the switching frequency. A plurality of recovery circuits may be used in a multi-phase inverter.
REFERENCES:
patent: 4336587 (1982-06-01), Boettcher, Jr. et al.
patent: 4639849 (1987-01-01), Noworolski et al.
patent: 4691270 (1987-09-01), Pruitt
patent: 4922401 (1990-05-01), Lipman
patent: 5130917 (1992-07-01), Shekhawat
patent: 5172309 (1992-12-01), DeDoncker et al.
patent: 5459655 (1995-10-01), Mori et al.
The Auxillary Resonant Commutated Pole Converter by R. W. DeDoncker and J. P. Lyons from IEEE,90/CH2935-5/90/0000-1228501.000 1990.
Resonant Snubbers With Auxilliary Switches by W. McMurray from IEEE, 89CH2792-0/89/0000-0829501.00 1989.
Hecker Stuart N.
Kaman Electromagnetics Corporation
Newport News Shipbuilding and Dry Dock Company
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