Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1992-10-26
1994-06-14
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 81, 363 89, H02M 708
Patent
active
053216008
ABSTRACT:
A three phase power conditioner. The inventive power conditioner (10) converts an alternating current input signal from a three phase source (12) into a direct current output signal and includes a first circuit (20) for converting a first phase of the input signal into a first direct current output signal. A second circuit (22) is included for converting a second phase of the input signal into a second direct current output signal. Likewise, a third circuit (24) converts a third phase of the input signal into a third direct current output signal. A control circuit (30) regulates the power supplied by the first, second and third circuits to balance the loads (26) for all load values dynamically. In an illustrative implementation, the first, second and third circuits (20, 22, and 24) are implemented with boost converters and the controller (30) is implemented with a load share controller. The inventive power conditioner is adapted for use with Wye and Delta configured three phase power sources.
REFERENCES:
patent: 4386394 (1983-05-01), Kocher et al.
patent: 4509108 (1985-04-01), Gallios
patent: 4680689 (1987-07-01), Payne et al.
patent: 5003453 (1991-03-01), Tighe et al.
Marple, "Low Distortion Three-Phase Power Regulator," vol. 22, No. 3, pp. 970, 1, Aug. 1979.
"Design of a 1kW Power Factor Correction Circuit"; by M. K. Nalbant, et al., Power Conversion and Intelligent Motion, Jul. 1990, pp. 17-24.
Micro Linear Preliminary Specification for the ML4812 Power Factor Controller, Sep. 1989.
"Active Power Factor Correction Technique"; M. K. Nalbant & A. Koblinski; Micro Linear Application Note 9, Sep. 1989.
Unitrode Load Share Controller Specification, Aug. 1991.
Beha Jr. William H.
Denson-Low W. K.
Hughes Aircraft Company
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