Title:
POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JPS60191318
Kind Code:
A
Abstract:
PURPOSE:To improve the efficiency of a power supply voltage with simple constitution by charging a capacitor after turning on a switch element by a PUT between a time point when a pulsating voltage which is raised up once is reduced down to a desired level and a time point when said voltage is set at 0V. CONSTITUTION:The AC voltage is divided by a diode bridge 1 of a power supply voltage through resistances 2 and 3 in the form of a pulsating current of a voltage waveform Vi. Then the voltage Vg is supplied to the gate of a PUT4. The waveform Vi is delayed by a capacitor 6 and a resistance 5 and clamped by a Zener diode 7 with addition of the anode of the PUT4. The rise of the Vg is accelerated compared with the voltage Va, and the PUT4 conducts when the Vg is reduced less than the Va. Then a current is flowed to the gate of an SCR8 serving as a switching element from the cathode of the PUT4, and a smoothing capacitor 9 is charged by the SCR8 with a direct pulsating current Vi. Then the stabilized DC output voltage Vb is delivered from both ends of the capacitor 9.
Inventors:
WADA MASAMI
GANJI NOBUO
GANJI NOBUO
Application Number:
JP4750284A
Publication Date:
September 28, 1985
Filing Date:
March 12, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G05F1/10; H02M7/155; (IPC1-7): G05F1/56
Attorney, Agent or Firm:
Yoshihiro Morimoto