JPS649605A - Superconducting coil apparatus - Google Patents
Superconducting coil apparatusInfo
- Publication number
- JPS649605A JPS649605A JP16587887A JP16587887A JPS649605A JP S649605 A JPS649605 A JP S649605A JP 16587887 A JP16587887 A JP 16587887A JP 16587887 A JP16587887 A JP 16587887A JP S649605 A JPS649605 A JP S649605A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- current
- permanent
- switch
- transformer
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To simplify the constitution of an apparatus, to simplify the operation and to decrease a cost, by cutting an AC power source when quenching occurs in a superconductive coil, and feeding back the current of the superconductive coil to the AC power source through a series circuit of a switching element and a Zener diode. CONSTITUTION:When a permanet current switch 2 is quenched, a permanent current, which is circulated between a coil 1 and the permanent switch 2, flows into a transformer 4. A primary input to the transformer 4 is automatically cut with an overcurrent relay. A base current for a power transistor 6 becomes also zero. At this time, magnetic energy in the coil 1 is mostly consumed in a Zener diode 7 and the power transistor 6. Voltage drops at both parts are not too large. Therefore a large voltage is not generated across both ends of the coil 1. This is favorable for insulating the coil 1 and the permanent switch 2. Since the coil 1 is demagnetized relatively slowly, the AC heating amount of the coil 1 and a cryostat 3 is small.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16587887A JPS649605A (en) | 1987-07-02 | 1987-07-02 | Superconducting coil apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16587887A JPS649605A (en) | 1987-07-02 | 1987-07-02 | Superconducting coil apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS649605A true JPS649605A (en) | 1989-01-12 |
Family
ID=15820696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16587887A Pending JPS649605A (en) | 1987-07-02 | 1987-07-02 | Superconducting coil apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS649605A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006332559A (en) * | 2005-05-30 | 2006-12-07 | Toshiba Corp | Persistent current superconducting magnet and persistent current switch used therefor |
-
1987
- 1987-07-02 JP JP16587887A patent/JPS649605A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006332559A (en) * | 2005-05-30 | 2006-12-07 | Toshiba Corp | Persistent current superconducting magnet and persistent current switch used therefor |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2600206B1 (en) | AC CURRENT LIMITER | |
ATE209405T1 (en) | SUPERCONDUCTIVE SHORT CIRCUIT CURRENT LIMITER | |
ES547280A1 (en) | Circuit arrangement for switching resistive and inductive electric users in d.c. and a.c. circuits | |
JPS649605A (en) | Superconducting coil apparatus | |
ES8302972A1 (en) | Control circuit | |
JPS5484425A (en) | Switching regulator | |
ES454612A1 (en) | Fault current protection switch | |
JPS5783008A (en) | Rectification type flux pump device | |
JPS54151324A (en) | Demagnetizer | |
JPS57184389A (en) | Electronic device | |
JPS5612123A (en) | Electric-current feedback type driving circuit | |
JPS6422009A (en) | Superconducting magnet device | |
JPS5783007A (en) | Rectification type flux pump device | |
JPS5728578A (en) | High voltage generating circuit | |
SU907714A1 (en) | Purcussion-action unipolar generator | |
EP0434889A3 (en) | Inverter and power supply systems including same | |
JPS6431317A (en) | Switchgear | |
ZA831174B (en) | Protective circuit breaker arrangement,suitable for use as an advance automatic cut-out | |
JPS57210612A (en) | Switching regulator | |
JPS6426372A (en) | High voltage generating device | |
JPS57199326A (en) | Time switch | |
JPS5656190A (en) | Double voltage single-phase motor | |
JPS6485573A (en) | Switching power supply device | |
JPS55144779A (en) | Control power supply device for thyristor | |
JPS56133992A (en) | Braking device for synchronous machine |