Static inverter with energy return

Details Static inverter with energy return Static inverter with energy return

1979-10-19

1982-09-07

Pellinen, A. D.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 16, 363 98, H02M 7537

Patent

active

043487190

ABSTRACT:
In a static inverter for providing a low-frequency output (e.g. 60 Hz) from a d.c. supply, the passage of low-frequency currents through the inverter transformer is avoided by producing a train of high-frequency pulses (e.g. 40 kHz) which represent, for example by their pulse widths, the successive instantaneous amplitudes of the required low-frequency voltage. These pulses cause a train of corresponding pulses to be produced at the secondary of the transformer, and this train is filtered to produce a unidirectional voltage having the desired instantaneous amplitudes. This voltage is fed to a transistor switching bridge which changes the unidirectional voltage into an alternating voltage having the required low frequency. A circuit is preferably provided to allow regeneration of power from the load back into the d.c. supply.

REFERENCES:
patent: 3310730 (1967-03-01), Ruch
patent: 3423663 (1969-01-01), Payne
patent: 3514688 (1970-05-01), Martin
patent: 3641422 (1972-02-01), Farnsworth et al.
patent: 3742330 (1973-06-01), Hodges et al.
patent: 3879647 (1975-04-01), Hamilton et al.
patent: 3970916 (1976-07-01), Kienscherf
patent: 4095166 (1978-06-01), Shibata et al.
patent: 4097863 (1978-06-01), Chambers
patent: 4124885 (1978-11-01), Nordby
patent: 4178629 (1979-12-01), Allen et al.

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