JPS5553711A - Effective value feedback-type thyristor phase controller - Google Patents
Effective value feedback-type thyristor phase controllerInfo
- Publication number
- JPS5553711A JPS5553711A JP12729378A JP12729378A JPS5553711A JP S5553711 A JPS5553711 A JP S5553711A JP 12729378 A JP12729378 A JP 12729378A JP 12729378 A JP12729378 A JP 12729378A JP S5553711 A JPS5553711 A JP S5553711A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- effective value
- resistances
- value
- effective
- 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.)
- Granted
Links
Abstract
PURPOSE: To ensure the high-stability and high-accuracy control by feeding the effective value voltage back to the amplifier circuit, thus realizing an effective application to the electric furnace or the like.
CONSTITUTION: In the control of the electric furnace voltage, the heating temperature is proportional to the heating power (voltage). In this connection, the thyristor is formed into the effective value feedback type to prevent the variation of the control temperature. With application of DC input voltage 40 in the effective value feedback SCR phase control circuit with the polygonal line approximation correction, transistor 41 conducts with the ignition secured to SCR45 and 46. And the mean value voltage emerges across capacitor C59 via feedback circuits 49W58. On the other hand, with increment of split voltage 15W53, the current flows to C59 via diodes 55 and 57 plus resistances 56 and 58. As a result, the voltage of C59 becomes higher than the mean voltage value, and the charging voltage of C59 features the broken line type change at the split voltage point. In this connection, a linear relation can be secured between the voltage 40 and the effective value of load 48 by approximating resistances 51W55 which decide the polygonal line voltage plus resistances 56 and 58 which decide the charging current to the effective value respectively.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12729378A JPS5553711A (en) | 1978-10-18 | 1978-10-18 | Effective value feedback-type thyristor phase controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12729378A JPS5553711A (en) | 1978-10-18 | 1978-10-18 | Effective value feedback-type thyristor phase controller |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5553711A true JPS5553711A (en) | 1980-04-19 |
JPS627567B2 JPS627567B2 (en) | 1987-02-18 |
Family
ID=14956370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12729378A Granted JPS5553711A (en) | 1978-10-18 | 1978-10-18 | Effective value feedback-type thyristor phase controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5553711A (en) |
-
1978
- 1978-10-18 JP JP12729378A patent/JPS5553711A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS627567B2 (en) | 1987-02-18 |
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