Current sourced inverter with saturating output transformer

Details Current sourced inverter with saturating output transformer Current sourced inverter with saturating output transformer

1980-09-05

1982-08-10

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 25, 363 49, 363 53, 363 97, 331113A, H02P 1322

Patent

active

043441220

ABSTRACT:
A Royer circuit, which includes an inverter and a saturating output transformer, is powered from a current source rather than from a voltage source, thereby reducing transistor current overshoot when the output transformer saturates. A current source inductor and a PWM (pulse width modulated) power transistor are series connected in the current return line of the inverter. The PWM power transistor emitter is connected so that potential between it and the common DC input power terminal will be low. This permits the PWM power transistor to be direct-coupled from a low voltage PWM switched mode power supply control circuit. A start-up circuit for supplying start-up power to inverter control circuitry from the DC input source is provided. Feedback loop control for the PWM power transistor is also provided.

REFERENCES:
patent: 2849614 (1958-08-01), Rover et al.
patent: 3742330 (1973-06-01), Hodges et al.
patent: 3846691 (1974-11-01), Higgins
patent: 4034280 (1977-07-01), Cronin
patent: 4190883 (1980-02-01), Cowett
patent: 4215392 (1980-07-01), Rhoads
IBM Technical Disclosure Bulletin, vol. 14, No. 11, Apr. 1972, p. 3548.
Conference: Application of Remote Sensing and Ranging Systems From Space, 20th Int. Space Convention, Rome, Italy, (Mar. 11-13, 1980), 153-64.

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