Fault compensating multi-step wave inverter

Details Fault compensating multi-step wave inverter Fault compensating multi-step wave inverter

1993-05-11

1994-08-16

Stephan, Steven L.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 58, 322 10, H02M 112

Patent

active

053392353

ABSTRACT:
A multi-step, alternating current power supply that provides for a failed-operation redundancy safety system that compensates for a short-circuited power switch and maintains an AC regulated output voltage without introducing undesirable harmonic components. The firing and logic controller 33 senses a short-circuited power switch 46 within an inverter bridge 32 and disables all complementary power switches 48 within the faulted bridge and enables the remaining power switches 50 in the faulted bridge. The firing sequence is adjusted for the remaining healthy power switches 52 by increasing the phase shift of the individual waveforms 54. The generator voltage is increased as required to maintain the desired AC voltage output level 56.

REFERENCES:
patent: 3638094 (1972-01-01), VeNard, II
patent: 3775662 (1973-11-01), Compoly et al.
patent: 4554501 (1985-11-01), Baker
patent: 4750098 (1988-06-01), Heinrich et al.
patent: 5040105 (1991-08-01), Dhyanchand et al.
patent: 5138544 (1992-08-01), Jessee
patent: 5177460 (1993-01-01), Dhyanchand et al.
patent: 5239454 (1993-08-01), Dhyanchand et al.

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