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Device and method for measuring heat effect of magnetic material in alternating magnetic field

A technology of alternating magnetic field and magnetic material, which is used in the screening of magnetic materials for anti-icing of power transmission wires, and the field of devices for measuring the thermal effect of magnetic materials in alternating magnetic fields, which can solve the problems of inability to measure the thermal effect of magnetic materials, and achieve measurement data. Authentic and reliable, low operating cost, easy to operate

Active Publication Date: 2012-01-18
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the defect that the thermal effect of magnetic materials in the alternating magnetic field cannot be measured in the prior art, the present invention proposes a device and method for measuring the thermal effect of magnetic materials in the alternating magnetic field based on the temperature rise method. Magnetic field and ambient temperature change, measure the calorific value of magnetic materials in a certain intensity of alternating magnetic field, use it as an index to judge the ice-melting ability of magnetic materials, and provide a basis for the screening of anti-icing magnetic materials

Method used

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  • Device and method for measuring heat effect of magnetic material in alternating magnetic field
  • Device and method for measuring heat effect of magnetic material in alternating magnetic field
  • Device and method for measuring heat effect of magnetic material in alternating magnetic field

Examples

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Effect test

Embodiment 1

[0063] like image 3 As shown, the sample to be tested in this example is a cylindrical sample 6 to be tested, and the solenoid is a long straight solenoid 4 .

[0064] The measuring device described in this example is mainly composed of an alternating magnetic field generating device, a constant temperature device and a temperature measuring element 11 . The alternating magnetic field generating system includes an AC power source 1, an AC ammeter 2, a rheostat 3 and a long straight solenoid 4. The AC power source 1 is connected to a 220V voltage, and one outlet end of the AC power source 1 is connected to an AC ammeter 2 and a rheostat 3 in sequence. A long straight solenoid 4 is connected between the other outlet end of the power supply 1 and the outlet end of the rheostat 3, and the long straight solenoid is evenly wound around the outside of the thermostatic chamber, and the AC ammeter 2 is used to observe the current situation in the device in real time , the rheostat 3 ...

Embodiment 2

[0079] like Figure 4 As shown, the sample to be tested in this example is an annular sample 18 to be tested, and the solenoid is an annular solenoid 17 .

[0080] The measuring device described in this example is mainly composed of an alternating magnetic field generating device, a constant temperature device and a temperature measuring element 11 . The alternating magnetic field generation system includes an AC power source 1, an AC ammeter 2, a rheostat 3 and a ring solenoid 17. The AC power source 1 is connected to a 220V voltage. The two ends of the annular solenoid 17 on the outer layer of the test sample 18 are respectively connected with the other outlet end of the AC power supply 1 and the outlet end of the rheostat 3. The AC ammeter 2 is used to observe the current situation in the device in real time, and the rheostat 3 is used for To change the current intensity in the circuit; the constant temperature system includes a constant temperature room and a circulation ...

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Abstract

The invention relates to a device and a method for measuring heat effect of a magnetic material in an alternating magnetic field, wherein the device comprises an alternating magnetic field generation device, a thermostat and a temperature measuring element, and the method comprises the steps of: putting a sample to be measured in a sample cup filled with measuring medium, regulating the temperature of the measuring medium to a predetermined value, putting the sample cup into a thermostatic chamber, conducting alternating current after heat balance reaches balance, applying the alternating magnetic field, and determining heating power of the sample to be measured by using the temperature measuring element to monitor temperature change of the measuring medium in the sample cup at certain time interval. The measurement device and method have the characteristics of continuously adjustable intensity of the alternating magnetic field, adjustable alternating frequency and measurement temperature of the magnetic field and simple structure, have the advantages of simple and convenient operation, real and reliable measurement data, good repeatability and low running cost, and are significant to the screening of ice-covering-proof magnetic materials.

Description

technical field [0001] The invention belongs to the field of thermal effect measurement, in particular to a device and method for measuring the thermal effect of magnetic materials in an alternating magnetic field. Screening of magnetic materials for icing. Background technique [0002] Line icing is one of the natural disasters that seriously threaten the safe operation of power systems. According to incomplete statistics, from December 1954 to the end of 2006, there were more than 1,000 various icing disasters in power grids (including transmission lines and substations) with a voltage level of 6,000 volts and above in various parts of China, of which 35,000 There are more than 86 icing disasters with a large scale of 10 volts or above and causing serious faults in the power grid. Especially at the beginning of 2008, the most serious freezing disaster occurred in most parts of southern China and the eastern part of Northwest my country, which caused serious damage to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
Inventor 陈新徐丽叶荣昌龙毅
Owner CHINA ELECTRIC POWER RES INST