A permanent magnet magnetic performance temperature coefficient measurement and variable temperature/high temperature permanent magnet magnetic performance monitoring device

A technology of temperature coefficient and monitoring device, which is applied in the direction of magnetic property measurement, measuring device, and magnetic variable measurement, which can solve the problems of difficulty in measuring and monitoring the magnetic properties of permanent magnets and complicated methods, and achieve the effect of cost saving and affordable price

Active Publication Date: 2022-07-26
HEBEI UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the measurement and monitoring of the magnetic properties of permanent magnets under variable temperature / high temperature is difficult and the method is complicated, the invention proposes a device for measuring the temperature coefficient of magnetic properties of permanent magnets and monitoring the magnetic properties of variable temperature / high temperature permanent magnets

Method used

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  • A permanent magnet magnetic performance temperature coefficient measurement and variable temperature/high temperature permanent magnet magnetic performance monitoring device
  • A permanent magnet magnetic performance temperature coefficient measurement and variable temperature/high temperature permanent magnet magnetic performance monitoring device
  • A permanent magnet magnetic performance temperature coefficient measurement and variable temperature/high temperature permanent magnet magnetic performance monitoring device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1: Experiment with FeCo waveguide wire and a device that can adjust the magnitude of the axial magnetic field under normal temperature conditions. The purpose of this embodiment is to measure the relationship between the output voltage and the axial magnetic field using the FeCo waveguide wire at room temperature (25° C.).

[0084] The construction of the experimental platform: the permanent magnet is placed 60cm from the left side of the detection coil. The circular permanent magnet used in the experiment is samarium cobalt YX28. The measuring device is taken out to facilitate the experiment, and the output voltage value of the detection coil is observed and recorded with a computer.

[0085] Experimental process and results: such as Figure 9 As shown, at 25°C, the pulse current is increased from 2A to 40A with a step size of 2A, and the axial magnetic field strength is increased from 5kA / m to 100kA / m with a step size of 5kA / m. The experimental results show t...

Embodiment 2

[0088] Example 2: Use figure 1 The shown device measures the temperature coefficient of a permanent magnet with a temperature coefficient of -0.05% to verify the accuracy and feasibility of the experimental device.

[0089] Construction of the experimental platform: Put the permanent magnet on the measuring rod 60cm from the left side of the detection coil, put it into the heating furnace, fix it with a permanent magnet fixing device, and then control the temperature of the heating furnace to increase from 20 °C to 270 °C with a step size of 50 °C , measure the axial magnetic field at each temperature, and then calculate the temperature coefficient based on the measured data and compare it with the known temperature coefficient of the permanent magnet.

[0090] Experimental process and results: The experimental results are as follows Figure 11 As shown, the minimum temperature coefficient of the temperature range of 220-270°C is -0.0571%, and the maximum temperature coeffic...

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Abstract

The invention relates to a device for measuring the temperature coefficient of magnetic properties of a permanent magnet and monitoring the magnetic properties of a variable temperature / high temperature permanent magnet. The device includes an ammeter, a temperature display, a heat preservation brick, a thermocouple, a computer, a measuring device, a heating furnace and a fixing device; the measuring device includes a measuring rod, a connecting device, an elastic device and a magnetic shielding device; the connecting device consists of a clamp and the base; the base is in the shape of a cuboid, and the left part is provided with a clamp; the right part is opened with a rectangular groove, two slide rails are arranged in the groove, and an elastic device is installed; the measurement The end of the rod is placed in the groove of the inner wall of the heating furnace; the first end protrudes out of the heating furnace, is arranged on the left side of the damping, and is fixed horizontally by a clamp. The device obtained by the invention can be used to measure the temperature coefficient of the permanent magnet at high temperature and monitor the magnetic performance of the permanent magnet at high temperature, the working temperature can reach 600 DEG C, the price is affordable, the service life is long, and the method is simple.

Description

technical field [0001] The invention relates to a permanent magnet magnetic performance measurement technology, which can be used for the measurement of the temperature coefficient of the permanent magnet magnetic performance under variable temperature / high temperature and the magnetic performance monitoring of the permanent magnet used in actual devices in the variable temperature / high temperature working environment. Background technique [0002] In recent years, with the development of permanent magnet materials, they have been widely used in traveling wave tubes, inverter air conditioners, new energy vehicle motors, wind power generation, aerospace and national defense and other fields. In these fields, permanent magnets generally work in a variable temperature environment or even a high temperature environment, and the magnetic properties of the permanent magnet will change with the change of temperature. The magnetic properties of permanent magnets are an important fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12G01R33/00
CPCG01R33/12G01R33/007
Inventor 李明明程天宇王千牛小东李保良张原野
Owner HEBEI UNIV OF TECH
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