Power converter

Abstract

Abstract PURPOSE:To reduce the switching loss of a main transistor by controlling the On and OFF of a rectifier with the logic product output of the ON output of a load side voltage detecting means and the ON output of a rise detecting delay circuit. CONSTITUTION:The rise of a voltage of an exciting direction which is induced in the secondary coil N2 of a trnasformer 4 is detected by a delay circuit 11, and the output of the delay circuit 11 rises in delay by the time longer than the rising time of a main transistor 1 from the detected time. Since an input which is connected to the output side of a control circuit 8 of two inputs of a logic circuit 12 has already risen by the ON output of the control circuit 8, a rectifying transistor 2 and a circulating transistor 3 are respectively conducted and interrupted simultaneously when the output of the delay circuit 11 has risen. Consequently, no conducting switching loss is produced at the main transistor 1.

Inventors

• 👤 Mikio Yamazaki
• 👤 幹夫 山崎

Bibliographic Details