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A low-frequency complex permeability testing device and method for soft magnetic thin films

A technology of complex magnetic permeability and soft magnetic film, which is applied in the direction of permeability measurement, magnetic performance measurement, etc.

Active Publication Date: 2022-03-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The complex permeability of the soft magnetic film is the key parameter to calculate the hysteresis loss noise under the low-frequency signal, but the existing film complex permeability test devices are all aimed at the complex permeability test under the high-frequency signal, which cannot satisfy above requirements
The traditional method of measuring low-frequency complex permeability is used to measure the solid annular magnetic material. For thin soft magnetic films, there is currently no method for measurement and related calculations.

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  • A low-frequency complex permeability testing device and method for soft magnetic thin films
  • A low-frequency complex permeability testing device and method for soft magnetic thin films
  • A low-frequency complex permeability testing device and method for soft magnetic thin films

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Embodiment Construction

[0022] In order to facilitate understanding of the invention, the present invention will be described in more detail below with reference to the specific embodiments and drawings. In the inside and outside of the present invention, it is inoperable relative to the rotary center axis of the ring test body 1, which is adjacent to the rotary center shaft, which is away from the rotary center shaft.

[0023] Low-frequency complex magnetic permeability test device for soft magnetic film, such as figure 1 As shown, the ring test body 1, the coil 2, and the LCR table 3 are, and the coil 2 is uniformly wrapped around the outer surface of the ring test body 1, and the terminal of the coil 2 is connected to the LCR Table 3. Such as Figure 2-3 As shown, the annular test body 1 is a circular annular rotating body structure, including a molar film 11, a thin film fixing frame 12, and an external card 13; the thin film fixing frame 12 and the external connection. The snap ring 13 is a ring-shap...

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Abstract

A low-frequency complex magnetic permeability test device and method for soft magnetic films, by designing a rotary ring test body with a circular busbar, fixing the soft magnetic film inside the ring test body, The outer surface of the structure is uniformly wound with a coil, and the terminals of the coil are connected to the LCR meter to test the equivalent resistance and equivalent inductance of the annular test body containing the soft magnetic film under the low-frequency signal, thereby obtaining the low-frequency complex magnetic field of the soft magnetic film. Conductivity, to achieve the purpose of calculating and evaluating its hysteresis loss noise.

Description

Technical field [0001] The present invention relates to a low-frequency complex magnetic permeability test apparatus and method for the soft magnetic film, belonging to the field of magnetic material magnetic thermal conductivity measurement. Background technique [0002] The atomic self-propelled field measurement system based on Spin-Exchange Revelment-Free, SERF) technology has an extensive application prospect in the frontier scientific research, basic physics research and biomedical. The ultra-high sensitivity magnetic field measuring device based on SERF atoms requires a stable magnetic field environment, generally using conventional magnetic materials for magnetic shielding, isolation magnetic field and environmental magnetic field interference. However, the magnetic material of the traditional magnetic material is very high, which has a great impact on the sensitivity of the measurement. A soft magnetic film having high magnetic permeability (such as slope monotomy, amorp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12
CPCG01R33/1223
Inventor 陆吉玺高亚楠马丹跃王坤李思然蒋硕孙畅
Owner BEIHANG UNIV