Electric power conversion equipment

Details Electric power conversion equipment Electric power conversion equipment

1994-12-19

1997-10-21

Hecker, Stuart N.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, H02M 75387

Patent

active

056802994

ABSTRACT:
A two level inverter having a switching element the switching frequency of which is higher than that of GTO, and providing a continuous control substantially over a full range of output voltages wherein the two level inverter comprises as its pulse modes an asynchronous bipolar modulation mode, a multi-pulse mode of an overmodulation mode, and a one pulse mode, and wherein advantageously the multi-pulse mode and the one pulse mode are arranged to be changed, thereby to enable a continuous control of its output voltage and reduce tone changes in the magnetic noise as well.

REFERENCES:
patent: 5321599 (1994-06-01), Tanamachi et al.
patent: 5361196 (1994-11-01), Tanamachi et al.
patent: 5467262 (1995-11-01), Nakata et al.
"Technique for pulse elimination in pulsewidth-modulation inverters with no waveform discontinuity," D. Grant et al. IEE Proc. vol. 129, Pt. B., No. 4, Jul. 1982, pp. 205-210.
"Evaluating the Recent Inverter Control Methods," Denkisha no Kagaku, 1, Apr. 1993, published in Denkisha Kenkyuukai, pp. 13-18.

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