SWITCH CURRENT SENSING WITH SNUBBER CURRENT SUPPRESSION IN A PUSH-PULL CONVERTER.

摘要

a push-pull converter with power switching transistors (20, 21) which are alternately connected to a dc power source (+ v, - v) of the primary windings (16),(17) an output transformer (15). a damping circuit for powering (31, 32) is connected to the power switch.when a power switch is energized, current pulses through the damping circuits connected to the two switches.a detector circuit for switching current has a current transformer with an output winding (45, 46 and 55) coupled inductively with each driver (47)(48) connected between the power switches (20, 21) and the primary windings (16, 17) of the output transformer (15).the pulses of current period (37, 50, 51) via the conductors move 180 and are suppressed in the output current of the transformer.the current signal from the secondary switch (55) of the current transformer (54) is free from pulse period and is used in a balancing circuit for flux (68, 69, 70), and a pulse by pulse current limiter (72).