Direct-voltage converter for feeding an appliance with an induct

Details Direct-voltage converter for feeding an appliance with an induct Direct-voltage converter for feeding an appliance with an induct

1986-03-05

1987-08-18

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 56, 363132, H02P 1318, H02M 75387

Patent

active

046881646

ABSTRACT:
A direct-voltage converter for supplying an appliance with an inductive component, in which two transistors are connected in series between direct-current voltage terminals and are made alternatively conductive in a push-pull mode by the first of two windings of a transformer. Two free-running diodes are connected in parallel to the transistors, and a junction between the two diodes supplies their output voltage. This junction is connected to a further junction between the transistors, through a third winding on the transformer. An electronic switch is connected in parallel with a fourth winding of the transformer, and is periodically made conductive by the output voltage through a pulse shaper with a switching pulse. The pulse shaper has two direct current circuit points which determine the peak value and relationship of currents flowing through the two transistors. An amplitude-comparison stage in the pulse shaper has inputs connected to the two circuit points. The output voltage of the amplitude-comparison stage controls the frequency of the switching pulse. The arrangement is such that the converter protects against overload.

REFERENCES:
patent: 4085300 (1978-04-01), MacKenzie et al.
patent: 4199807 (1980-04-01), Crowe et al.
patent: 4614998 (1986-09-01), Rilly

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