JPS55135918A - Constant-voltage power supply circuit - Google Patents

Constant-voltage power supply circuit

Info

Publication number
JPS55135918A
JPS55135918A JP4298579A JP4298579A JPS55135918A JP S55135918 A JPS55135918 A JP S55135918A JP 4298579 A JP4298579 A JP 4298579A JP 4298579 A JP4298579 A JP 4298579A JP S55135918 A JPS55135918 A JP S55135918A
Authority
JP
Japan
Prior art keywords
output voltage
waveform
pulse width
voltage
insulating transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4298579A
Other languages
Japanese (ja)
Inventor
Junichi Ikoma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4298579A priority Critical patent/JPS55135918A/en
Publication of JPS55135918A publication Critical patent/JPS55135918A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To get rid of a ringing effect and to economize unnecessary power consumption for suppressing it, by using two switching elements and driving the primary side of the insulating transformer by low impedance at all times.
CONSTITUTION: The switching elements 1 and 2 conduct each other, and the voltage of its middle point becomes such a waveform as switching between the output voltage E of the unstabilized power supply 13 and the ground. This waveform becomes a waveform clamped at the position which has been lowered by the voltage drop portion in the forward direction by a diode 6 after passing through a cpacitor 3, an insulating transformer 4 and a capacitor 5. Since the average value of this waveform is varied depending upon the pulse width, an output voltage which has beeen smoothed by the pulse width can be changed. Accordingly, the output voltage is compared with the reference voltage, and in case the output voltage is higher, a pulse of narrow width is generated by the modulation circuit 10, is input into the drive circuit 12 through the insulating transformer 11, and conduction of the elements 1 and 2 is controlled by this output in order to reduce the pulse width. On the other hand, in case the output voltage has been dropped, the pulse width is increased.
COPYRIGHT: (C)1980,JPO&Japio
JP4298579A 1979-04-11 1979-04-11 Constant-voltage power supply circuit Pending JPS55135918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4298579A JPS55135918A (en) 1979-04-11 1979-04-11 Constant-voltage power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4298579A JPS55135918A (en) 1979-04-11 1979-04-11 Constant-voltage power supply circuit

Publications (1)

Publication Number Publication Date
JPS55135918A true JPS55135918A (en) 1980-10-23

Family

ID=12651320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4298579A Pending JPS55135918A (en) 1979-04-11 1979-04-11 Constant-voltage power supply circuit

Country Status (1)

Country Link
JP (1) JPS55135918A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904016A (en) * 1986-05-16 1990-02-27 Nissan Motor Co., Ltd. Front spoiler arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904016A (en) * 1986-05-16 1990-02-27 Nissan Motor Co., Ltd. Front spoiler arrangement

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