Superconductive band ac loss test device and method

A technology of superconducting tape and AC loss, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of low automation, time-consuming, and low test accuracy, and achieve efficient and rapid test accuracy and automation high effect

Active Publication Date: 2009-03-18
SHANGHAI INT SUPERCONDUCTION TECH CO LTD
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Problems solved by technology

[0003] The object of the present invention is to provide a superconducting strip AC loss testing device and method, which solve...

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  • Superconductive band ac loss test device and method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] A superconducting tape AC loss testing device, such as figure 1 shown, including the sample to be tested, the protection resistor, and

[0017] A gradient amplifier, the output of which is connected to the sample to be tested and the protection resistor to form a main circuit;

[0018] A Hall current sensor is arranged in the main circuit to measure the effective value of the current;

[0019] An industrial control computer, equipped with a data acquisition card, provides control signals for the main circuit to control the entire measurement process, collects the current output of the Hall current sensor and the voltage signal at both ends of the sample to be tested, and processes the collected data and save;

[0020] A lock-in amplifier to measure the axial voltage across the sample to be tested and the phase angle between the voltage and cur...

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Abstract

The invention relates to a superconductive strip material alternative current loss tester and a method. The tester comprises a gradient amplifier, a hall current sensor, an isolation amplifier, an industry control computer, a phase-locked amplifier, an object sample and a protective resistance. The method comprises: using the computer to control the OSC of the phase-locked amplifier to output a sine signal of a certain frequency f and a certain amplitude, transmitting the signal via the first-stage isolation amplifier to reach the gradient amplifier, controlling the gradient amplifier to generate a current signal Irms of a same frequency f, generating a loss voltage Vrms on the sample; using the phase-locked amplifier to measure the loss voltage Vrms and the phase phi U; using the hall current sensor and the phase-locked amplifier to measure the phase phi I of the current signal Irms; using the hall current sensor and a data acquisition card to collect the volume Irms of the current signal; and using equations to calculate the alternative current transmission loss of the superconductive strip material. The invention has high automatic degrees, high efficiency, high speed and high test accuracy.

Description

technical field [0001] The invention relates to a superconducting tape AC loss testing device and method. Background technique [0002] When a superconductor is placed in an alternating magnetic field or passed through an alternating current, energy dissipation will occur in the superconductor, and this energy dissipation is called AC loss. Since the AC loss directly affects the economy of superconducting cables, the research on the AC loss of high-temperature superconducting materials has received extensive attention from all over the world. The test methods of AC loss are mainly divided into two categories: one is the electronic method, and the other is the thermal method. Among them, electronic methods mainly include wattmeter method, electronic integration method (magnetization method) and lock-in amplifier method; thermal methods mainly include temperature rise method and calorimetric method. The present invention adopts the lock-in amplifier method, because compared ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 宗曦华张喜泽韩云武张智勇魏东应启良张大义邓长胜何砚发
Owner SHANGHAI INT SUPERCONDUCTION TECH CO LTD
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