JPS55124819A - Alternating current constant-voltage unit - Google Patents
Alternating current constant-voltage unitInfo
- Publication number
- JPS55124819A JPS55124819A JP3193879A JP3193879A JPS55124819A JP S55124819 A JPS55124819 A JP S55124819A JP 3193879 A JP3193879 A JP 3193879A JP 3193879 A JP3193879 A JP 3193879A JP S55124819 A JPS55124819 A JP S55124819A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- reference voltage
- soft start
- triac
- 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 obtain the output variable type AC constant-voltage unit which can operate the soft start circuit without delay smoothly, by setting the output voltage detection capacitor so that it can be adopted to the reference voltage after change, when the reference voltage is changed.
CONSTITUTION: The voltage across the load L controlled with the Triac 12 is given to the capacitor 24 via the transformer 21 and rectifier 22. The error amplifier 16 produces the control voltage VA with the voltage and reference voltage including the resistor 25 and controls the Triac 12 via the phase control circuit 150 and the pulse transformer. With the absence of the gate signal, the capacitors 46, 24 are charged up to the voltages VC, VB via the resistors 153 and 31 respectively, and the amplifier 16 produces the output voltage VA accompanied with it, and VA≈VB is obtained with the feedback circuit consisting of the transistor 41 and diode 45, i.e., soft start circuit. When VA is set to the operation start voltage of the phase control circuit, the circuit shown can perform soft start at all times even with the change in the reference voltage.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3193879A JPS55124819A (en) | 1979-03-19 | 1979-03-19 | Alternating current constant-voltage unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3193879A JPS55124819A (en) | 1979-03-19 | 1979-03-19 | Alternating current constant-voltage unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55124819A true JPS55124819A (en) | 1980-09-26 |
Family
ID=12344905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3193879A Pending JPS55124819A (en) | 1979-03-19 | 1979-03-19 | Alternating current constant-voltage unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55124819A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57206931A (en) * | 1981-06-15 | 1982-12-18 | Hitachi Ltd | Soft starting circuit |
-
1979
- 1979-03-19 JP JP3193879A patent/JPS55124819A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57206931A (en) * | 1981-06-15 | 1982-12-18 | Hitachi Ltd | Soft starting circuit |
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