experiment no.14: study of zvs active-clamped forward ... · transient current build-up that...

Experiment No.14: Study of ZVS active-clamped

Forward Converter with synchronous rectifier

PROCEDURE:

Step1: Make the control circuit in the bread board to generate gate pulses for all the five switches.

Step2: Connect the corresponding points of PCB with the bread board.

Step3: Connect the power circuit and the load rheostat.

Step4: First turn on the control circuit and then the power circuit.

Step5: Save the following waveforms:-

1) All the gate pulses in different combinations 2) VDS of M1 and gate pulse of M1 3) VDS of M5 and gate pulse of M5 4) VDS of M4 and gate pulse of M4 5) VDS of M3 and gate pulse of M3 6) Voltage across Rt (current through tertiary) and gate pulse of M2 7) Voltage across R9 (current through M3) and gate pulse of M3 8) Voltage across R11(current through primary) and voltage across Rt (current through tertiary)

Step6: Turn off the power circuit and then the control circuit.

CIRCUIT DIAGRAM:

Power Circuit

Gate Driver Circuit

Control Circuit (part1)

Control Circuit (part2)