Three-phase self-balancing power supply

Details Three-phase self-balancing power supply Three-phase self-balancing power supply

1995-03-31

1996-05-21

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 52, 361 88, 307 58, H02M 7217

Patent

active

055196004

ABSTRACT:
In a delta-connected power supply system, phase switching circuits are employed and are activated during the failure of one of N+1 converter units. This activation is employed even though there has been no outage in any one of the input phases. The result is two operating converters running in effect as three-phase converters. Since each of the converters then acts as a full wave three-phase bridge with a resistor load, the line currents are perfectly balanced although unity power factor is not maintained during this non-normal mode of operation. In such circumstances, higher power factor is temporarily sacrificed to achieve continuous operation and therefore higher overall system reliability.

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Fuld, B. et al., "A Combined Buck and Boost Power-Factor-Controller for Three-Phase Input", 5th European Conf. on Power Electronics and Applications, 1993, V. 7 IEEE, pp. 144-148.
Fuld, B. et al., "Analysis and Design of a Wide Input Range Power Factor Correction Circuit for Three-Phase Applications", IEEE Applied Power Electronics Conference, 1993, pp. 299-305.

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