JPS5578629A - Overvoltage reduction circuit for semiconductor switch - Google Patents
Overvoltage reduction circuit for semiconductor switchInfo
- Publication number
- JPS5578629A JPS5578629A JP15217178A JP15217178A JPS5578629A JP S5578629 A JPS5578629 A JP S5578629A JP 15217178 A JP15217178 A JP 15217178A JP 15217178 A JP15217178 A JP 15217178A JP S5578629 A JPS5578629 A JP S5578629A
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- resistor
- overvoltage
- semiconductor switch
- current flows
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/73—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for dc voltages or currents
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Power Conversion In General (AREA)
- Thyristor Switches And Gates (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To secure the complete reduction for the overvoltage energy by providing plural units of the serial circuit consisting of the thyristor and the nonlinear resistor in parallel to the semiconductor switch and then securing the difference of the limit voltage characteristics between the nonlinear resistors. CONSTITUTION:If the limit voltage is set to V1-V3 for nonlinear resistors R1-R3 functioning as the overvoltage reduction elements, V1>V2>V3 is secured. And now if semiconductor switch 1 is opened, the overvoltage is applied across switch 1. When this voltage reaches near the allowable dielectric strength level, the gate signal is sent to thyristor S1 for ignition. As a result, the overcurrent can be reduced less than the prescribed level. And when the power loss of resistor R1 reaches the allowable absorption loss, the ignition is given to thyristor S2. And the current flows to all serial circuits 12 of resistor R2, thus S1 being turned off. After this and in the same way, the current flows to serial circuit 13 of thyristor S3 and resistor R3 to turn off S2. In such way, the current flows to resistors R1, R2 and R3 in sequence, and thus the overcurrent can be absorbed in the good state of allotment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15217178A JPS5922415B2 (en) | 1978-12-08 | 1978-12-08 | Overvoltage suppression circuit for semiconductor switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15217178A JPS5922415B2 (en) | 1978-12-08 | 1978-12-08 | Overvoltage suppression circuit for semiconductor switches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5578629A true JPS5578629A (en) | 1980-06-13 |
| JPS5922415B2 JPS5922415B2 (en) | 1984-05-26 |
Family
ID=15534581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15217178A Expired JPS5922415B2 (en) | 1978-12-08 | 1978-12-08 | Overvoltage suppression circuit for semiconductor switches |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922415B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6131451U (en) * | 1984-07-30 | 1986-02-25 | エステ−化学株式会社 | air freshener container |
-
1978
- 1978-12-08 JP JP15217178A patent/JPS5922415B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5922415B2 (en) | 1984-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0227407A3 (en) | A protection circuit for a power converter apparatus | |
| JPS5578629A (en) | Overvoltage reduction circuit for semiconductor switch | |
| JPS5596728A (en) | Load driving circuit | |
| JPS5783922A (en) | Delay circuit | |
| JPS5233055A (en) | Switching method of power source | |
| JPS5530237A (en) | Gate driver for gate turn-off thyristor | |
| JPS55128925A (en) | Two-way static type breaker | |
| JPS561620A (en) | Output circuit | |
| SU1105977A1 (en) | Process for starting static equalizer of reactive power | |
| JPS55121745A (en) | Direct current solid state breaker | |
| SU826519A1 (en) | Dc voltage converter | |
| JPS5694973A (en) | Inverter device | |
| JPS5722386A (en) | Inverter circuit | |
| JPS5784183A (en) | Solar battery panel | |
| SU1663678A1 (en) | Device for protection against single-phase ground faults | |
| JPS5577392A (en) | Controller for induction motor | |
| JPS5511658A (en) | Electronic relay unit | |
| JPS5563600A (en) | Car generator | |
| JPS5731373A (en) | Turn-on circuit for thyristor without control electrode | |
| JPS56132019A (en) | High-voltage pulse circuit | |
| JPS55115727A (en) | Direct current solidstate circuit breaker | |
| JPS567114A (en) | Electric power unit | |
| JPS51118059A (en) | Switching mode regulator circuit | |
| JPS5317948A (en) | Protective circuit for overcurrent | |
| JPS55140172A (en) | Composite equivalent testing device of breaker |