Electronic inverter having magnitude-controllable output

Details Electronic inverter having magnitude-controllable output Electronic inverter having magnitude-controllable output

1985-02-04

1987-02-17

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

315223, 331113A, 363100, H02M 7538

Patent

active

046444599

ABSTRACT:
A push-pull inverter is supplied from an inductively current-limited DC voltage source by way of a center-tap on a transformer having significant inductance. This transformer inductance is parallel-coupled with a capacitance means. The inverter is made to self-oscillate through positive feedback provided by way of a saturable current transformer. The inverter frequency is determined by the saturation time of this current transformer, which saturation time is designed to be longer than the half-cycle period of the natural resonance frequency of the transformer inductance combined with the capacitance means. The resulting inverter output voltage may be described as a sequence of substantially sinusoidal half-cycles interconnected with periods of zero-magnitude voltage. By controlling the length of the saturation time, the effective magnitude of the inverter output voltage is controlled, thereby permitting control of the amount of power provided to a load connected thereto.

REFERENCES:
patent: 3315178 (1967-04-01), Chernish
patent: 4277726 (1981-07-01), Burke
patent: 4279011 (1981-07-01), Nilssen
patent: 4460949 (1984-07-01), Steigerwald
patent: 4484108 (1984-11-01), Stupp et al.
patent: 4508996 (1985-04-01), Clegg et al.
patent: 4513364 (1985-04-01), Nilssen
patent: 4535271 (1985-08-01), Holmes
patent: 4562382 (1985-12-01), Elliott
Baker, "High Frequency Power Conversion with FET-Controlled Resonant Charge Transfer", PCI Apr. 1983 Proceedings, pp. 130-133.

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