Title:
AUXILIARY POWER SOURCE CIRCUIT FOR BACK BOOST TYPE CONVERTER
Document Type and Number:
Japanese Patent JPS59103573
Kind Code:
A
Abstract:
PURPOSE:To simplify the winding of a main transformer by obtaining voltages for driving and controlling a drive circuit of a main transistor from an auxiliary winding of the transformer. CONSTITUTION:A DC power source voltage E is controlled ON or OFF by a main transistor, applied to the primary winding N1 of a transformer T, and a voltage induced in the secondary winding N2 is supplied to a load R through a rectifying and smoothing circuit having a diode D1 and a capacitor C2. When the transistor is conducted, the voltage induced in the tertiary winding N3 is supplied as a power source V'E of a drive circuit CONT of the transistor through the diode D1, a capacitor C3 and a diode D4, and when the transistor is interrupted, the control voltage VS of the drive circuit CONT of the transistor is supplied through a diode D2, a capacitor C4 and the diode D3.
Inventors:
SHIMIZU TAMIO
Application Number:
JP21188682A
Publication Date:
June 15, 1984
Filing Date:
December 02, 1982
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H02M3/338; H02M3/335; (IPC1-7): H02M3/335
Attorney, Agent or Firm:
Koshiro Matsuoka