Static power converter multilevel phase driver containing power

Details Static power converter multilevel phase driver containing power Static power converter multilevel phase driver containing power

1999-04-27

2000-08-08

Riley, Shawn

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 41, H02M 700

Patent

active

061011096

ABSTRACT:
In the particular embodiments described, an unlimited voltage static power converter includes an array of multi-level phase drivers consisting of a plurality of H-bridge power modules connected in series. The midpoint node of the series-connected power semiconductors is connected to corresponding midpoint nodes in adjacent H-bridges to achieve a desired high output voltage using available power switch ratings. A three-dimensional multi-level, multi-phase, multi-circuit array of H-bridges permits the use of the static power converter for high power applications, while providing a high degree of power quality. The power semiconductor switches are operated in accordance with a two-dimensional interleaved pulse width modulation algorithm which produces a waveform with a switching frequency that can be more than an order of magnitude higher than the switching frequency of a single power switch. PWM complementary triangle carrier waves are used for individual PWM control of each H-bridge in each multi-level phase driver, resulting in a two-dimensional interleaved control algorithm. Injection of harmonic or non-harmonic content into the PWM reference waveform further reduces harmonic and non-harmonic content of the output voltage waveforms. Part-load efficiency is increased using unique load partitioning methods, five of which are described herein.

REFERENCES:
patent: 4947100 (1990-08-01), Dhyanchand et al.
patent: 5703767 (1997-12-01), Stacey
patent: 5757633 (1998-05-01), Bowles
patent: 5933339 (1999-08-01), Duba et al.

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