Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1997-01-24
1998-08-11
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
323222, 323223, H02M 706
Patent
active
057936250
ABSTRACT:
A circuit that involves the application of boost mode regulator techniques is used to regulate the output of an a.c. source. The source inductance becomes part of the boost mode circuit, thus avoiding the losses associated with the addition of external inductors. When a three-phase alternator is the power source, the circuit comprises a six diode, three-phase rectifier bridge, three FET transistors and a decoupling capacitor. The invention involves shorting the output of the power source to allow storage of energy within the source inductance. During this time, the decoupling capacitor supports the load. When the short is removed, the energy stored in the inductances is delivered to the load. Because the circuit uses the integral magnetics of the source to provide the step-up function, the efficiency of the design can be quite high.
REFERENCES:
patent: 4677366 (1987-06-01), Wilkinson
patent: 4688162 (1987-08-01), Mutch et al.
patent: 5414613 (1995-05-01), Chen
patent: 5502630 (1996-03-01), Rokhvarg
patent: 5625549 (1997-04-01), Horvat
Prasad, et al. "Active Input Current Waveshaping Method for Three-Phase Diode Rectifiers with Zero Switching Losses", IEEE/IAS Annual Meeting, May 1991, Conference Record, pp. 932-938.
Baker Hughes Incorporated
Sterrett Jeffrey L.
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