Modular constant current power supply

Details Modular constant current power supply Modular constant current power supply

1975-07-03

1977-06-28

Goldberg, Gerald

Electric power conversion systems

Current conversion

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

363 71, H02M 3335

Patent

active

040328309

ABSTRACT:
A power supply employing a clock-driven D.C.-A.C.-D.C. converter having a current transformer in the A.C. section to develop a trapezoidal current feedback pulse train which is then converted to a trapezoidal voltage pulse train. A comparator compares the trapezoidal voltage pulse train to a voltage reference level set such that it is normally crossed by the ramp portion of each trapezoidal voltage pulse. Upon occurrence of a ramp crossing, which varies with the level of the output current, a control pulse is produced by the comparator and supplied to gating logic which develops driving pulse trains for the D.C.-A.C.-D.C. converter and cuts off each driving pulse upon occurrence of a control pulse. The resulting power supply constitutes a voltage-controlled constant current power supply which may be connected with an arbitrary number of other such supplies to a power bus and to a common feedback-controlled voltage reference source.

REFERENCES:
patent: 3624405 (1971-11-01), Bishop et al.
patent: 3670234 (1972-06-01), Joyce
patent: 3737758 (1973-06-01), Allington
patent: 3742330 (1973-06-01), Hodges et al.
patent: 3859583 (1975-01-01), Reed
patent: 3859586 (1975-01-01), Wadlington
patent: 3898549 (1975-08-01), Mitchell
patent: 3916282 (1975-10-01), Rothermel
patent: 3927363 (1975-12-01), Mitchell et al.
patent: 3938024 (1976-02-01), Clarke
patent: 3947747 (1976-03-01), Smith

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