JPS5629721A - Power supply circuit - Google Patents
Power supply circuitInfo
- Publication number
- JPS5629721A JPS5629721A JP10573379A JP10573379A JPS5629721A JP S5629721 A JPS5629721 A JP S5629721A JP 10573379 A JP10573379 A JP 10573379A JP 10573379 A JP10573379 A JP 10573379A JP S5629721 A JPS5629721 A JP S5629721A
- Authority
- JP
- Japan
- Prior art keywords
- level
- voltage
- circuit
- detected
- terminal voltage
- 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
Abstract
PURPOSE: To reduce the amount of power consumption and at the same time solve such problems as the generation of heat and the like for the power supply circuit the input of which has a big fluctuation, by controlling the transistor through the detection of the level of the terminal voltage of the smoothing capacitor.
CONSTITUTION: The terminal voltage of the smoothing capacitor C32 is detected through the level detecting circuit 33, and then the transistor TR34 is controlled. The TR34 is turned on at the moment when the circuit 33 consisting of the Schmitt circuit having the hysteresis in the detection levels L1 and L2 (L1>L2) detects that the terminal voltage E of C32 exceeds the level L1. And the discharge is started through the load of C32, and the voltage E reached the level L2 by the discharge is detected 33. Thus the TR34 is turned off. Then the C32 is charged through the diode 31, and thus the voltage E is increased suddenly. The above action is repeated to supply the voltage of nearly a constant level to the load. The dotted line and the 1-spot chain line between levels L1 and L2 show a large amount and small amount each of the current detected by the rectifier CT.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10573379A JPS5629721A (en) | 1979-08-20 | 1979-08-20 | Power supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10573379A JPS5629721A (en) | 1979-08-20 | 1979-08-20 | Power supply circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5629721A true JPS5629721A (en) | 1981-03-25 |
Family
ID=14415480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10573379A Pending JPS5629721A (en) | 1979-08-20 | 1979-08-20 | Power supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5629721A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833971A (en) * | 1981-08-25 | 1983-02-28 | Fuji Electric Co Ltd | Control system for chopper |
-
1979
- 1979-08-20 JP JP10573379A patent/JPS5629721A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833971A (en) * | 1981-08-25 | 1983-02-28 | Fuji Electric Co Ltd | Control system for chopper |
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