JPS5642814A - Electric power supply unit - Google Patents

Electric power supply unit

Info

Publication number
JPS5642814A
JPS5642814A JP11806979A JP11806979A JPS5642814A JP S5642814 A JPS5642814 A JP S5642814A JP 11806979 A JP11806979 A JP 11806979A JP 11806979 A JP11806979 A JP 11806979A JP S5642814 A JPS5642814 A JP S5642814A
Authority
JP
Japan
Prior art keywords
voltage
output
constant
supplied
resistance
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
JP11806979A
Other languages
Japanese (ja)
Inventor
Yoshio Sakai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11806979A priority Critical patent/JPS5642814A/en
Publication of JPS5642814A publication Critical patent/JPS5642814A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To secure a certain level of voltage at all times regardless of the fluctuation of the input voltage, by rectifying the secondary output of the leakage transformer and then obtaining a constant level of voltage from the rectification output and through the constant voltage circuit.
CONSTITUTION: The input terminals A1 and A2 are connected to the primary side of the leakage transformer Tr. As the transformer Tr has such characteristics in that the saturation is secured with the fixed voltage by the secondary voltage to the increment of the primary voltage, the smoothing is given to the output obtained by connecting the secondary side to the resistance R1 and the rectifier RF via the capacity C1. The smoothed output is then supplied as the constant voltage to the operational amplifier Q1 by the constant voltage diode ZD via the resistance R2, and at the same time the rectification output is supplied to the serial circuit of the trip coil TC and the thyristor Q2. On the other hand, the secondary output of the zero-phase current transformer ZCT is supplied to the amplifier Q1 via the resistance, and the output of the Q1 receives a rectification through the double voltage rectifying circuit consisting of the diodes D2 and D3 to be applied to the gate terminal of the thyristor ZD. In such way, the increment characteristics of the Tr is saturated to set the current of the diode ZD at the level lower than the allowed value, thus obtaining a constant level of voltage.
COPYRIGHT: (C)1981,JPO&Japio
JP11806979A 1979-09-14 1979-09-14 Electric power supply unit Pending JPS5642814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11806979A JPS5642814A (en) 1979-09-14 1979-09-14 Electric power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11806979A JPS5642814A (en) 1979-09-14 1979-09-14 Electric power supply unit

Publications (1)

Publication Number Publication Date
JPS5642814A true JPS5642814A (en) 1981-04-21

Family

ID=14727228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11806979A Pending JPS5642814A (en) 1979-09-14 1979-09-14 Electric power supply unit

Country Status (1)

Country Link
JP (1) JPS5642814A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134031U (en) * 1984-07-30 1986-03-01 株式会社 長谷川工務店 Silent ventilation system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536858A (en) * 1976-07-08 1978-01-21 Matsushita Electric Ind Co Ltd Stabilized dc power source

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536858A (en) * 1976-07-08 1978-01-21 Matsushita Electric Ind Co Ltd Stabilized dc power source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134031U (en) * 1984-07-30 1986-03-01 株式会社 長谷川工務店 Silent ventilation system
JPH0419385Y2 (en) * 1984-07-30 1992-05-01

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