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Method and device for large-scale b-h loop measurement of soft magnetic materials

A soft magnetic material, a wide range of technology, applied in the direction of magnetic performance measurement, can solve the problems of poor test result accuracy and repeatability, discontinuous B-H loop, etc., to achieve the effect of continuous and stable current

Active Publication Date: 2021-11-30
长沙天恒测控技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The invention provides a method and device for measuring a large-scale B-H loop on soft magnetic materials to solve the accuracy and repeatability of test results caused by using mechanical switches or electronic switches to switch ranges in existing measurement methods The technical problems of poor performance and discontinuity of the obtained B-H loop

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  • Method and device for large-scale b-h loop measurement of soft magnetic materials

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Embodiment Construction

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0033] For ease of understanding, such as image 3 As shown, the preferred embodiment of the present invention provides a method for measuring a large-scale B-H loop for soft magnetic materials, which can ensure the monotonous and continuous change of the current during the measurement process, thereby ensuring the accuracy and repeatability of the measurement results. And the obtained B-H loop is also continuous. Specifically, the method for performing large-scale B-H loop measurement on soft magnetic materials includes the following steps:

[0034] Step S1: Connect two current channels in parallel and connect them in series with the sample excitation coil and power supply. One current channel includes semiconductor voltage-controlled devices and the first sampl...

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Abstract

The invention discloses a method and a device for measuring a large-scale B-H loop of a soft magnetic material. The method measures by setting two current channels connected in parallel. When the output voltage value of the power supply is small, only the current channel where the second sampling resistor is located is put into the circuit to form a small current range, and when the output voltage value of the power supply becomes large, When the conduction voltage of the semiconductor voltage-controlled device is exceeded, the second current channel is put into the circuit to form a large current range. During the entire measurement process, the large and small current ranges are always in working condition. Compared with the existing mechanical switch or The electronic switch is used to switch the current range, the current path will not return to zero due to a short-term open circuit, and there is no transient transient of the magnetic field, and the magnetization process of the sample excitation coil is carried out continuously, ensuring continuous and stable current in an ultra-wide range Regulation and accurate measurement of the magnitude of the current, the resulting B‑H loop is also continuous.

Description

technical field [0001] The present invention relates to the technical field of B-H loop measurement of soft magnetic materials, in particular, to a method for large-scale B-H loop measurement of soft magnetic materials, and also relates to a method for large-scale measurement of soft magnetic materials. Device for range B-H loop measurement. Background technique [0002] In order to further improve the competitiveness of the company, manufacturers of soft magnetic materials need to conduct a comprehensive analysis of their products, and quantitatively analyze the magnetic performance parameters of the material during quality control, and the measurement and drawing of the B-H loop are usually used to achieve this purpose effective and fast way. In practical applications, we usually use the fast scanning method to obtain the B-H loop of the tested sample. In the process of measurement, B is usually obtained by directly integrating the induced voltage on the secondary side, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 周新华李关仁姚兴茂
Owner 长沙天恒测控技术有限公司
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