Superconducting coil protective system
First Claim
1. A superconducting coil protective system for protecting a superconducting coil connected in parallel to a power source generating an output voltage, said protective system comprising:
- quenching detecting means for detecting occurrence of quenching in said superconducting coil and generating a quenching signal indicative of the occurrence of a quenching;
a protective resistor connected in parallel to said superconducting coil for dissipating the energy stored on the superconducting coil;
a normally-closed power switch for interrupting an electric current flowing from the power source to the superconducting coil in response to the quenching signal from said quenching detecting means; and
a fuse circuit connected in parallel to said power switch and including a fuse and a closure switch connected to each other in series.
1 Assignment
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Accused Products
Abstract
A superconducting coil protective system comprising a protective resistor connected in parallel to a superconducting coil for dissipating the energy stored on the superconducting coil and a normally-closed power switch for interrupting an electric current flowing from the power source to the superconducting coil in response to a quenching signal from the quenching detector. A fuse circuit, which includes a serially-connected fuse and a closure switch, is connected in parallel to the power switch. The protective system may comprise a current interrupting circuit connected in parallel to the superconducting coil and the protective resistor and a commutation switch connected in series with the protective resistor and the current interrupting circuit for allowing a commutation of a current from the superconducting coil to the current interrupting circuit in response to the quenching signal. In this case, the fuse circuit is connected in parallel to the protective resistor.
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Citations
10 Claims
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1. A superconducting coil protective system for protecting a superconducting coil connected in parallel to a power source generating an output voltage, said protective system comprising:
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quenching detecting means for detecting occurrence of quenching in said superconducting coil and generating a quenching signal indicative of the occurrence of a quenching; a protective resistor connected in parallel to said superconducting coil for dissipating the energy stored on the superconducting coil; a normally-closed power switch for interrupting an electric current flowing from the power source to the superconducting coil in response to the quenching signal from said quenching detecting means; and a fuse circuit connected in parallel to said power switch and including a fuse and a closure switch connected to each other in series. - View Dependent Claims (2)
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3. A superconducting coil protective system for protecting a superconducting coil connected in parallel to a power source generating an output voltage, said protective system comprising:
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quenching detecting means for detecting occurrence of quenching in said superconducting coil and generating a quenching signal indicative of the occurrence of quenching; a protective resistor connected in parallel to the superconducting coil for dissipating the energy stored on the superconducting coil; a current interrupting means connected in parallel to the superconducting coil and said protective resistor; a commutation switch connected in series with said protective resistor and said current interrupting means for allowing a commutation of a current from said superconducting coil to said current interrupting means in response to said quenching signal; and a fuse circuit connected in parallel to said protective resistor and including a fuse and a closure switch connected to each other in series. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification