Superconduction switch for superconduction coil

Abstract

The invention discloses a superconduction switch for a superconduction coil. The superconduction switch is characterized in that a resistance wire (4) which is connected with a heating power supply (5) is wound on a heat-conduction cylinder (2); a superconduction section (1) penetrates through the cylinder (2), and two ends, stretching out of the cylinder (2), of the superconduction section (1) are respectively connected with two leading-out ends of the superconduction coil (6); two leading-out ends of the superconduction coil (6) are also connected with a power supply (7) respectively through a power supply wire (7a). The superconduction switch is used for powering the superconduction coil, and after the superconduction coil is powered for one time, a magnetometer can obtain a high and stable noiseless magnetic field for a relatively long time; after the superconduction coil is powered by the superconduction switch for one time, the stable excitation current of an excitation system can be maintained for a long time, so that a car-mounted power supply which needs to continuously power the excitation system in the linear superconduction driving can be canceled, the weight of a suspension vehicle body can be reduced, and the system running efficiency can be improved.

Description

technical field [0001] The invention relates to a superconducting switch for a superconducting coil. Background technique [0002] The superconducting switches currently used in superconducting coils are all low-temperature superconducting switches. Its structure and principle are that the heater is integrated with a short section of superconducting material, and then connected in series with the superconducting coil; when the heater is turned on, the temperature of the section of superconducting material connected to the heater rises to its critical temperature Above, the current can no longer flow easily to realize the "opening" of the switch; when the heater is turned off, the current can flow through the non-resistance (superconducting state) superconducting material segment to realize the "closing" of the switch. Since the heater of the superconducting switch and the superconducting material section are connected in series to the branch circuit of the superconducting c...

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Problems solved by technology

For wind turbines, it is also necessary to have a power supply to continuously supply power to the excitation system of the wind turbine through the brushless excitation system. There is a rotating contact link, which reduces the reliability and service life of the motor.

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