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Device and method for measuring temperature properties of permanent magnet and permanent magnet material in open circuit

A permanent magnet material and temperature characteristic technology, applied in the direction of magnetic performance measurement, etc., can solve the problems of poor repeatability and insufficient resolution, and achieve the effects of wide application range, high measurement accuracy and good measurement repeatability

Inactive Publication Date: 2012-12-19
SOUTHWEST INST OF APPLIED MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing methods for measuring the temperature characteristics of permanent magnet materials, the present invention proposes a device and method for measuring the temperature characteristics of permanent magnets and permanent magnet materials in an open circuit, which solves the problems of insufficient resolution and poor repeatability in the prior art The problem

Method used

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  • Device and method for measuring temperature properties of permanent magnet and permanent magnet material in open circuit
  • Device and method for measuring temperature properties of permanent magnet and permanent magnet material in open circuit
  • Device and method for measuring temperature properties of permanent magnet and permanent magnet material in open circuit

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Embodiment 1

[0039] Example 1: Reference figure 1 As shown, this embodiment is an automatic embodiment for measuring the temperature characteristics of permanent magnets and permanent magnetic materials in an open magnetic circuit.

[0040] This embodiment consists of a sample box 2, a temperature detection and processing unit 3, an induced voltage generation unit 4, an induced voltage detection and processing unit 5, a sample pulling control unit 6, a temperature realization unit 7, and a computer realization and processing unit 8.

[0041] The sample box 2 is used to place the sample 1 to be tested and to insulate the sample 1 to be tested, such as image 3 As shown, the sample box 2 is composed of a box body 21, an upper cover 22, an insulating layer 23 and an inner cavity 24, and the sample 1 to be tested is placed in the inner cavity.

[0042] The temperature detection and processing unit 3 is used to measure the temperature of the sample 1 to be tested and send the temperature signa...

Embodiment 2

[0050] Embodiment 2, refer to Image 6 As shown, the induced voltage detection and processing unit 5 in this embodiment is a digital fluxmeter, the input terminal of the digital fluxmeter is connected to the output terminal of the Helmholtz coil 41 , and its output terminal is connected to the computer control and processing unit 8 . The temperature realization unit 7 is a high and low temperature test box with a temperature detection and display device. Other structures are the same as in Embodiment 1.

Embodiment 3

[0051] Embodiment 3, refer to Figure 7 Shown, all work of present embodiment is by manual operation. In this embodiment, the induced voltage detection and processing unit 5 is a digital fluxmeter. The temperature realization unit 7 is a high and low temperature test box with a temperature detection and display device. The computer control and processing unit 8 sends temperature control instructions to the temperature realization unit 7 to control the heating device 72 and the cooling device 73 to work. Manually pull the sample box 2 out of the Helmholtz coil 41 , and the other structures are the same as those in Embodiment 1.

[0052] A method for measuring the temperature characteristics of permanent magnet materials in an open circuit, using the principle of electromagnetic induction, using Helmholtz coils and fluxmeters, etc., to accurately measure the magnetic moment m of permanent magnets and the magnetization M at the working point d , The magnetic flux density B at t...

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Abstract

The invention belongs to the technical field of permanent magnet material property measurement and discloses a device for measuring temperature properties of a permanent magnet and a permanent magnet material in an open circuit, comprising a sample box (2), a temperature detection and processing unit (3), an induction voltage generating unit (4), an induction voltage detecting and processing unit (5), a sample drawing and controlling unit (6), a temperature realizing unit (7) and a computer controlling and processing unit (8). The invention further provides a method for measuring the temperature properties of the permanent magnet and the permanent magnet material in the open circuit. The device and the method disclosed by the invention have the beneficial effects that the shape of a sample to be detected is not limited, an application range is wide, the automatic measurement can be realized, the measurement repeatability is good and the measurement accuracy is high, so that the device and the method disclosed by the invention are particularly suitable for measuring the permanent magnet material with smaller measured temperature coefficient.

Description

technical field [0001] The invention relates to the technical field of measuring the characteristics of permanent magnet materials, in particular to a device and method for measuring the temperature characteristics of permanent magnets and permanent magnet materials in an open circuit. Background technique [0002] Temperature characteristics are important characteristic parameters of permanent magnet materials, including reversible temperature coefficient and non-loss, which are especially concerned in the application of permanent magnet materials, so the measurement of temperature characteristics becomes more important. At present, there are three types of measurement methods for the temperature characteristics of permanent magnet materials: (1) The first type, such as the method required by the national standard GB / T24270-2009 "Measurement Method for Temperature Coefficient of Magnetic Properties of Permanent Magnetic Materials": measure different temperatures under a clos...

Claims

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Application Information

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IPC IPC(8): G01R33/12
Inventor 张明谭福明李忭王敬东程玲莉沈安国
Owner SOUTHWEST INST OF APPLIED MAGNETICS
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