JPS5642814A - Electric power supply unit - Google Patents
Electric power supply unitInfo
- 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
Links
Landscapes
- Control Of Electrical Variables (AREA)
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
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)
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)
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 |
-
1979
- 1979-09-14 JP JP11806979A patent/JPS5642814A/en active Pending
Patent Citations (1)
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)
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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