Method and circuit arrangement for generating a sinusoidal line

Details Method and circuit arrangement for generating a sinusoidal line Method and circuit arrangement for generating a sinusoidal line

1991-06-20

1992-09-29

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 24, H02M 7538

Patent

active

051518511

ABSTRACT:
Method and circuit arrangement for generating a sinusoidal line AC voltage from a DC voltage. For generating a sinusoidal line AC voltage from a DC voltage, the DC voltage is converted into a square-wave voltage having voltage pulses whose durations are controlled in accordance with the variation of the sinusoidal line AC voltage to be generated. The square-wave voltage is transmitted via a high-frequency transformer. Subsequently, the transmitted voltage pulses are respectively tapped and filtered for a given chronological duration. A secondary side of the high-frequency transformer is respectively shorted during pulse pauses caused by the sinusoidal control of voltage pulse durations for a simultaneous constant applied pulse frequency. In these phases, energy is transmitted back to the source of the DC voltage via the high-frequency transformer. As a result, the circuit arrangement can also be employed as a charging circuit.

REFERENCES:
patent: 3517300 (1970-06-01), McMurray
patent: 4479175 (1984-10-01), Gille et al.
patent: 4772994 (1988-09-01), Harada et al.
"Regulating Pulse Width Modulator" Silicon General Product Catalog, 1984-85 pp. 93-102.
"Phase Controlled DC AC Converter with High Frequency Switching" Harada et al., IEEE Transactions on Power Electronics, vol. 3, No. 4, Oct. 1988, pp. 406-411.

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