Permanent magnet temperature coefficient open-circuit measuring device and method

Abstract

The invention relates to a permanent magnet temperature coefficient open-circuit measuring device and method. The permanent magnet temperature coefficient open-circuit measuring device comprises a balance support. The balance support is a box. A rack is placed at the bottom inside the balance support. A uniform gradient field generating device is placed on the rack and connected with a constant current power source. A high temperature furnace is placed on the uniform gradient field generating device or penetrates through the uniform gradient field generating device to be placed on the rack. The high temperature furnace is connected with a temperature control unit. An analytical balance is placed at the top of the balance support and connected with a computer. The computer is further connected with the temperature control unit. A sample suspension line is fixed to the lower end of the analytical balance. The sample suspension line penetrates through the top face of the balance support to extend into the high temperature furnace. The tail end of the sample suspension line is connected with a sample sleeve. A sample to be measured is placed inside the sample sleeve. According to the permanent magnet temperature coefficient open-circuit measuring device and method, the problem that at present, the accuracy and resolution ratio of permanent magnet temperature coefficient measurement are low is effectively solved, and the method and means are provided for measurement of critical materials in the aerospace field.

Description

technical field [0001] The invention relates to the technical field of temperature coefficient measurement of permanent magnet materials, in particular to an open-circuit measurement device and method for temperature coefficient of permanent magnets. Background technique [0002] In the field of permanent magnet materials, some permanent magnets with special applications, such as rare earth permanent magnets, are widely used in aerospace and national defense fields as materials for key components such as spacecraft and aircraft, and their magnetic properties directly affect the technical level of related fields. Due to the reasons of accuracy, safety and reliability, the above fields require that the magnetic properties of permanent magnet materials do not fluctuate with temperature changes, and spaceships, aircraft, etc. must use permanent magnet materials with ultra-low temperature coefficients. Therefore, it is particularly important to accurately measure the temperature ...

AI Technical Summary

Problems solved by technology

[0003] At present, the method for measuring the temperature coefficient of permanent magnet materials in the prior art is the closed magnetic circuit scanning method, and its measurement resolution is 10 -4 / ℃, with the research and application of ultra-low temperature coefficient permanent magnet materials to 10 -5 / °C order of magnitude advances, the existing measurement methods cannot meet the measurement requirements, and there is no public literature on the research on ultra-low temperature coefficient measurement methods

In China, the measurement methods of ultra-low temperature coefficient permanent magnet materials are seriously behind the progress of materials

With the further reduction of the temperature coefficient of permanent magnet materials, there is a lack of measurement methods and equipment, and foreign countries have adopted absolute confidentiality and embargo policies on this measurement technology, which limits the in-depth research on ultra-low temperature coefficient permanent magnet materials. Rare earth permanent magnet materials The application level in these fields cannot be continuously improved

[0004] At present, the open-circuit measurement method of permanent magnet temperature coefficient adopts the method of directly measuring the magnetic properties. Due to the limitation of the measurement principle and measuring instruments, it is difficult to meet the measurement resolution of the temperature coefficient of the permanent magnet material with an ultra-low temperature coefficient.

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