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A method for measuring the magnetization characteristics of magnetic materials

A technology of magnetization characteristics and magnetic materials, applied in the direction of magnetic susceptibility measurement, magnetic performance measurement, etc., can solve the problems of inability to obtain the magnetization characteristic curve, excitation current sampling error, high comprehensive cost, etc., and achieve easy realization, realization of demagnetization, and test circuit simple effect

Inactive Publication Date: 2019-11-12
FUZHOU UNIV
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Problems solved by technology

Therefore, the overall cost is high
[0008] 4. When the AC oscillation method is used to sample the excitation current of the primary side of the magnetic part under test with a digital oscilloscope, the amplitude of the excitation current changes very rapidly, resulting in a large sampling error for the excitation current. The sampling value of the current is differentially processed, so the sampling error will be further amplified, resulting in the inability to obtain a complete magnetization characteristic curve

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  • A method for measuring the magnetization characteristics of magnetic materials
  • A method for measuring the magnetization characteristics of magnetic materials
  • A method for measuring the magnetization characteristics of magnetic materials

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] Such as figure 1 As shown, this embodiment provides a method for measuring the magnetization characteristics of a magnetic material, which specifically includes the following steps:

[0038] Step S1: Provide a test circuit, the test circuit includes: a first switch S1, a second switch S2, an air-core inductor L 0 , Air-core inductor L 0 The parasitic resistance R 0 , Ring-shaped magnetic part under test L 1 , Ring-shaped magnetic part under test L 1 The parasitic resistance R 1 , a DC power supply U, a capacitor C, and a resistor R; the positive pole of the DC power supply U is connected to one end of the first switch S1, the other end of the first switch S1 is connected to one end of the second switch S2, and the capacitor C connected to one end of the second switch S2, and the other end of the second switch S2 is connected to the air-core...

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Abstract

The invention relates to a method for measuring magnetization characteristics of a magnetic material. On the basis of an original alternating current oscillation method, a testing circuit is improved,and measuring and calculating are conducted on the basis of the improved testing circuit. By means of the method for measuring the magnetization characteristics of the magnetic material, differentialcalculation in the data processing process is avoided, the measuring precision of the alternating current oscillation method is thus improved, and the magnetization characteristics of a magnetic element are precisely measured through the alternating current oscillation method.

Description

technical field [0001] The invention relates to the field of magnetization characteristic design of a magnetic element, in particular to a method for measuring the magnetization characteristic of a magnetic material. Background technique [0002] The optimal design of magnetic components in power converters requires precise determination of the magnetization characteristics of the magnetic materials. The metal magnetic powder core is a combination of metal magnetic powder particles, insulating package and air (binder), which has high saturation magnetic flux density, low magnetic permeability, and an impedance angle close to 90 degrees. The large capacity of the excitation power supply (high excitation voltage or large excitation current) required to measure the magnetization characteristics of the powder core magnetic components makes the measurement very difficult. [0003] Existing methods for measuring magnetization characteristics mainly include large-signal AC method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/16
CPCG01R33/16
Inventor 汪晶慧张宇超陈为
Owner FUZHOU UNIV
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