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Soft magnetic material characteristic measuring devices

A technology of soft magnetic materials and measuring devices, which is applied in the fields of magnetic properties measurement, magnetic susceptibility measurement, hysteresis curve measurement, etc. It can solve the problems of point-by-point measurement, low accuracy, and difficult to record data accurately, so as to achieve convenient data Recording and transmission, convenient operation and compact experimental equipment

Inactive Publication Date: 2003-11-19
NANJING UNIV
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  • Abstract
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Problems solved by technology

However, the data is not easy to record accurately, the accuracy is not high, and it cannot be measured point by point

Method used

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  • Soft magnetic material characteristic measuring devices
  • Soft magnetic material characteristic measuring devices

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Embodiment Construction

[0012] As shown in the figure, the annular soft magnetic material is the measured sample A, whose outer diameter is 60mm and inner diameter is 45mm, and the number of turns N is evenly wound on the sample A. 1 The number of magnetized coils and turns is N 2 Detection coils (both of which have 100 turns). In the magnetization circuit, including adjustable DC power supply E, relay K 1 , Sampling resistor R 0 , Variable resistor R h and sample selection switch K 2 , where the sampling resistor R 0 1Ω, the variable resistor R h is 5Ω. The maximum magnetizing current is controlled at 3A. In the measurement circuit, including resistance R, capacitance C, electronic integrator EI and electronic integrator reset switch K 3 , where R = 10KΩ, C = 10μf. M is a standard transformer for system calibration. from the sampling resistor R 0 The signal U coming out of both ends X and the signal U output from the electronic integrator EI 0 Enter the signal conditioning module, where...

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Abstract

A measuring device consists of closed-loop soft magnetic material and magnetization coil and detecing coil wound on it; magnetization loop connected in series by magnetization coil, sampling resistance, variable resistance and adjustable DC power supply controlled with communication switch or relay as well as measuring loop formed by detecting coil and electronic integrator. The two ends of sampling resistance and output end of electronic integrator are connected to signal handling module and analog-digital conversion circuit as the converter digital signal is connected to computer through computer parallel interface or interface card.

Description

1. Technical field [0001] The invention relates to a measuring device, in particular to a device for measuring the properties of soft magnetic materials using a static method. 2. Background technology [0002] In the current physical experiments, three methods are generally used to measure the characteristics of magnetic materials, namely, "impulse current method to measure hysteresis loop", "voltammetry to measure AC magnetization curve", "oscilloscope to measure dynamic hysteresis loop of sample". "(See "General Physics Experiment Guide" published by Peking University Press, by Xie Huiyuan et al.). [0003] The "impulse current method" is that the pulse current passes through the impact galvanometer to generate a corresponding deflection angle, which is proportional to the change ΔB of the magnetic induction intensity. However, when the magnetizing current is small, the deflection of the shock galvanometer is very small, so it is not suitable to measure the data accuratel...

Claims

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Application Information

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IPC IPC(8): G01R33/12G01R33/14G01R33/16
Inventor 于瑶胡立群江宏建潘元胜
Owner NANJING UNIV
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