Apparatus and method for testing resistance between uninsulated coil turns
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A technology of resistance testing and coil turns, which is applied in the field of non-insulated coil inter-turn resistance testing devices, can solve the problems of huge workload, high price of superconducting strips, and uneconomical problems, and achieve the reduction of consumables, saving of superconducting strips, cost-saving effect
Active Publication Date: 2020-02-14
SHANGHAI JIAO TONG UNIV
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[0004] At present, the price of superconducting strips is relatively expensive. It seems that the method of fitting the inter-turns of non-insulated superconducting coils through actual winding of non-insulated coils and carrying out flow tests at the required low temperature is a huge and uneconomical method. The development of a Small and fast non-insulated coil turn-to-turn resistance test device becomes very necessary
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Embodiment 1
[0039] The invention provides a non-insulated coil turn-to-turn resistance test device, which includes a bottom plate 3, a first baffle plate 4, a current lead 5, a voltage lead 6, a conductive column 7, a pressure push block 9, a pressure regulating screw 10 and a second stop plate 11;
[0040] The bottom plate 3 is provided with an accommodating groove 12, the first baffle plate 4 and the second baffle plate 11 are arranged at a certain distance along the axial direction of the accommodating groove 12, and the pressure push block 9 is placed In the accommodating groove 12 between the first baffle plate 4 and the second baffle plate 11 , the pressure regulating screw 10 extends through the second baffle plate 11 into the accommodating groove 12 Connect with the pressure push block 9;
[0041] The current lead 5, the conductive column 7 and the voltage lead 6 are arranged in the accommodating groove 12 between the first baffle plate 4 and the pressure pushing block 9 in a mir...
Embodiment 2
[0055] The present invention provides a method for testing the interturn resistance of a non-insulated coil, by using the non-insulated coil interturn resistance test device described in the above-mentioned embodiment 1, comprising the following steps:
[0056] S1, preparing several test strip sheets 1, and stacking the test strip sheets to form a test strip 2;
[0057] S2. Put the test strip 2 into the accommodating groove 12 between the voltage leads 6;
[0058] S3, using the pressure regulating screw 10 to adjust the distance between the pressure push block 9 and the first baffle plate 4, so that the test strip 2 reaches a suitable pressure value;
[0059] S4. Put the non-insulated coil turn-to-turn resistance testing device into the low temperature environment where the coil is actually used;
[0060] S5. Pass the current through the current lead 5, collect the voltage through the voltage lead 6, and gradually increase the current, and obtain the V-I curve after collectin...
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Abstract
The present invention relates to an apparatus for testing resistance between uninsulated coil turns in the field of superconducting belt material resistance measurement. The apparatus comprises a baseboard, a first baffle, a current lead, a voltage lead, a conducting cylinder, a pressure ejector block, a pressure regulating screw and a second baffle. The baseboard is provided with an accommodatinggroove. The first baffle and the second baffle are separately disposed along an axial direction of the accommodating groove at a certain interval. The pressure ejector block is disposed inside the accommodating groove between the first baffle and the second baffle. The pressure regulating screw passes through the second baffle, extends into the accommodating groove, and is connected to the pressure ejector block. The current lead, the conducting cylinder and the voltage lead are disposed inside the accommodating groove between the first baffle and the pressure ejector block in a mirror symmetry manner. A to-be-tested belt material is placed inside the accommodating groove between two voltage leads. The present invention further discloses a method for testing resistance between uninsulatedcoil turns. According to the apparatus and the method for testing resistance between uninsulated coil turns, a resistance value between uninsulated superconducting coil turns in conditions of different pressures and different temperatures can be fast measured, and efficiency is improved.
Description
technical field [0001] The invention relates to the field of resistance measurement of superconducting strips, in particular to a device and method for measuring interturn resistance of non-insulated coils. Background technique [0002] In 2011, Hahn proposed the concept of superconducting uninsulated coils. In this kind of coil, the inter-turn insulation of the coil is banned, that is, the surface of the superconducting strip for preparing the coil is not sprayed with insulating substances. This non-insulated superconducting coil between turns avoids the potential damage to the magnet caused by the quench phenomenon accompanying the insulated superconducting magnet. During the preparation of non-insulated superconducting coils, non-insulating materials with certain conductivity are filled between adjacent superconducting strips. Once the non-insulated coil is quenched, the quench current can flow through the adjacent layers, so as to ensure the normal operation of the sup...
Claims
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