Title:
ELECTRIC POWER SOURCE
Document Type and Number:
Japanese Patent JPS5810219
Kind Code:
A
Abstract:
PURPOSE:To have a current transformer for protecting overcurrent for common use with one and to miniaturize and reduce a cost, by performing a switching operation by making phases of two switching regulator circuits in one set different 180 deg. mutually. CONSTITUTION:A current tranformer CT0 is used per two circuits and is made the common iron core. A rectifier D3 is made a counter polarity to a usual rectifier. An output of an oscillator 1 is inputted to a control circuit 2a through an invertor INV and a rectangular wave pulse having a different phase in 180 deg. from a control circuit 2b is given. The others are the same as usual in circuit constitution and operation. As a pulse having the phase difference by 180 deg. is given to the circuit 2a and the circuit 2b, a switching operation of transistors TR1 and TR2 having the phase difference by 180 deg. is performed, but divided voltage by variable resistors VR1 and VR2 of DC output voltage V01 and V02 are inputted to control circuits 2a and 2b respectively and output voltages V01 and V02 are controlled so as to maintain a constant voltage value.
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Inventors:
NAKAMURA MITSUO
UNNO NOBUO
SHIMAMORI HIROSHI
UNNO NOBUO
SHIMAMORI HIROSHI
Application Number:
JP10775981A
Publication Date:
January 20, 1983
Filing Date:
July 10, 1981
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H02M3/28; H02M3/337; (IPC1-7): G05F1/64
Attorney, Agent or Firm:
Koshiro Matsuoka