DC to AC inverter with unregulated input and regulated output

Details DC to AC inverter with unregulated input and regulated output DC to AC inverter with unregulated input and regulated output

1975-07-14

1977-06-28

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 72, H02P 1320

Patent

active

040328325

ABSTRACT:
An inverter for producing regulated AC voltage from an unregulated DC voltage source, such as a battery, employs two stepped voltage waveform generating means independently controlled in phase to produce waveform outputs that approach sine waves which are additively combined to produce an AC output voltage whose amplitude is sensed to produce a feedback signal for comparison with a reference voltage to produce an error signal that causes one stepped waveform generating means to so shift in phase relative to the other as to reduce the error. Each stepped voltage waveform generating means is capable of producing at least half the total desired AC output voltage, so that the DC voltage source may drop by as much as 50% and the desired AC output voltage can still be maintained by shifting the relative phase between the stepped waveforms.

REFERENCES:
patent: 3205424 (1965-09-01), Bates
patent: 3278827 (1966-10-01), Corey et al.
patent: 3579081 (1971-05-01), Bates
patent: 3581212 (1971-05-01), McMurray
patent: 3657633 (1972-04-01), Urish
patent: 3750004 (1973-07-01), Walker
patent: 3775662 (1973-11-01), Compoly et al.
Electronic Design News, vol. 1, No. 1, pp. 86-92, Jan. 1973.
Electronic Design 25, "Which DC/AC inverter?", Dec. 6, 1974, pp. 54-59.

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