High efficiency multistep sinewave synthesizer

Details High efficiency multistep sinewave synthesizer High efficiency multistep sinewave synthesizer

1996-11-26

1998-05-26

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 41, 363 98, H02M 108, H02M 112

Patent

active

057576335

ABSTRACT:
A multistep inverter uses multiple inverter H-bridges connected in series to piecewise approximate a sine wave. The inverter H-bridges are bypassed or switched into service as required for sinewave synthesis. After a step is switched in, it creates its portion of the sine wave. Each step is further smoothed using pulse width modulation which leads to a smoother sine wave with the consequent advantages of lower distortion, smaller and lighter filtering circuits, and lower conversion losses during transistor switching.

REFERENCES:
patent: 4117364 (1978-09-01), Baker
patent: 5121315 (1992-06-01), Moriya
patent: 5198971 (1993-03-01), Recker et al.

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