JPS5482646A - Surge control circuit - Google Patents
Surge control circuitInfo
- Publication number
- JPS5482646A JPS5482646A JP15193477A JP15193477A JPS5482646A JP S5482646 A JPS5482646 A JP S5482646A JP 15193477 A JP15193477 A JP 15193477A JP 15193477 A JP15193477 A JP 15193477A JP S5482646 A JPS5482646 A JP S5482646A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- diode
- series circuit
- voltage
- control circuit
- 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 protect switching element from surge voltage by connecting series circuit for diode and capacitor in parallel with element and by applying suppressing reference voltage to the contact between diode and capacitor.
CONSTITUTION: A series circuit is provided for the relay coil 1 and the transistor TR2 for controlling the coil, and the series circuit consisting of the diode 3 and the capacitor 4 is connected in parallel with the collector and emitter of the TR2 by connecting its cathode side to the collector side. Furthermore, the resistor 5 for discharging charging current is connected to the capacitor 4 to divide the voltage by the resistor 11 and 5 so that the suppressing reference voltage VB is applied to the contact between the diode 3 and the capacitor 4. Thus, it is possible to suppress surge voltage and thus to protect switching element from surge voltage.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15193477A JPS5482646A (en) | 1977-12-15 | 1977-12-15 | Surge control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15193477A JPS5482646A (en) | 1977-12-15 | 1977-12-15 | Surge control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5482646A true JPS5482646A (en) | 1979-07-02 |
Family
ID=15529386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15193477A Pending JPS5482646A (en) | 1977-12-15 | 1977-12-15 | Surge control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5482646A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130050881A1 (en) * | 2010-05-11 | 2013-02-28 | Abb Technology Ag | Plant for transmitting high voltage dc electric power including overvoltage protection |
-
1977
- 1977-12-15 JP JP15193477A patent/JPS5482646A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130050881A1 (en) * | 2010-05-11 | 2013-02-28 | Abb Technology Ag | Plant for transmitting high voltage dc electric power including overvoltage protection |
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