Converter by stored switching pattern

Details Converter by stored switching pattern Converter by stored switching pattern

1980-07-10

1982-09-07

Malzahn, David H.

Boots, shoes, and leggings

364718, 328 14, 363 41, G06F 1534

Patent

active

043487343

ABSTRACT:
A digital controller for a converter comprises a memory for storing digital representations of the switching patterns for operating the converter to produce a predetermined segment of each one of a plurality of waveforms, respectively, the memory being operable for repetitively outputting at least a selected one, or concurrently one per phase, of the switching patterns, the waveforms being divided into equal angled zones, a respective predetermined segment when oriented in phase and made of appropriate polarity, substantially approximating the portion of its associated waveform within any of the zones of this waveform; and a decoder receptive of the switching patterns from the memory, for selectively gating the digital signals thereof onto a plurality of control lines, in an iterative manner, for operating the converter to produce a desired waveform or polyphase related waveforms, with the segments of each zone thereof properly oriented in phase and polarity.

REFERENCES:
patent: 3510751 (1970-05-01), Resch
patent: 3657657 (1972-04-01), Jefferson
patent: 3772681 (1973-11-01), Skingle
patent: 4047083 (1977-09-01), Plunkett
patent: 4095275 (1978-06-01), Fluet
patent: 4099109 (1978-07-01), Abbondanti
patent: 4202236 (1980-05-01), Wilcox et al.
patent: 4203543 (1980-05-01), Staiger et al.
patent: 4204267 (1980-05-01), Kalinichenko
patent: 4210962 (1980-07-01), Marsh
Beveridge et al., Optimization: Theory & Practice McGraw-Hill, 1970, pp. 679-682 & 699-701.
Murphy et al. "Microprocessor Control of a PWM Invertor Induction Motor Drive" IEEE Power Electronics Specialists Conference 1979, pp. 344-348.

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