Title:
PULSE POWER SUPPLY DEVICE FOR SUPERCONDUCTIVE COIL
Document Type and Number:
Japanese Patent JPS57150010
Kind Code:
A
Abstract:
PURPOSE:To prevent the occurrence of a quenching phenomenon which is caused by a sudden change of coil current and to produce a high voltage at a plasma circuit, by connecting a capacitor for time constant control or a resistance in parallel to a current transformer coil. CONSTITUTION:A power supply 13 is shifted to the operation of an inverter, and a main thyristor 8 of a thyristor breaker 7 is ignited. Thus the current of a current transformer coil 1 flows to the thyristor 8. When an auxiliary thyristor 9 of the breaker 7 is ignited, a commutating capacitor which is previously charged is discharged. And the commutating current breaks the current of the thyristor 8. The commutating current flows to a capacitor 30 of the low impedance, and the voltage between the current transformer coil terminals increases to induce the voltage at a plasma circuit 2. A switch 31 for application is ignited by a plasma ignition detector 34 and through a controller 37. Thus the current of the coil 1 flows to a time constant controlling resistance 6.
More Like This:
Inventors:
YABUNO KOUHEI
SAKURAI YOSHIMI
ISHIGAKI YUKIO
SAKURAI YOSHIMI
ISHIGAKI YUKIO
Application Number:
JP3394981A
Publication Date:
September 16, 1982
Filing Date:
March 11, 1981
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05F1/10; G21B1/21; H02M7/162; (IPC1-7): G05F1/64; G21B1/00; H05H1/12
Domestic Patent References:
| JPS5431295A | 1979-03-08 |