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High-power inductance testing device, main circuit thereof and testing method thereof

A test device and high-power technology, applied in the direction of measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve the problems of high cost, large volume, and large space occupied by high-power power inductors, and achieve portability, The effect of simple circuit structure and simple implementation

Inactive Publication Date: 2013-04-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This power inductance measurement method mainly has the following disadvantages: 1) It is large in size, heavy in weight and high in cost; 2) It is difficult to realize on-site testing
High-power power inductors usually occupy a large and heavy space at the installation site, and it is difficult to provide a large space for the test device on site; 3) Multiple measurements are required

Method used

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  • High-power inductance testing device, main circuit thereof and testing method thereof
  • High-power inductance testing device, main circuit thereof and testing method thereof
  • High-power inductance testing device, main circuit thereof and testing method thereof

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Embodiment Construction

[0021] For inductive equipment, an iron core is usually inserted into the inductance coil to increase the magnetic permeability. The relationship between magnetic permeability, magnetic field strength and magnetic induction is: . When the magnetic induction intensity H is small, the magnetic induction intensity B and the magnetic field intensity are approximately linear, and the magnetic permeability μ is almost unchanged. However, with the further increase of the applied magnetic field intensity, the magnetic induction intensity does not continue to increase linearly, but has a nonlinear relationship with the magnetic field intensity, and finally tends to be saturated and stable at a certain value, at which time the magnetic permeability of the core decreases rapidly. Calculated from the inductance formula It can be seen that the inductance and permeability, the number of turns squared N 2 It is proportional to the cross-sectional area A and inversely proportional to the ...

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Abstract

The invention discloses a high-power inductance testing device which is small in volume, light in weight and low in cost. The device comprises a main circuit and a control circuit, wherein the main circuit comprises a precharging circuit and an inductance testing devicee, the control circuit mainly consists of a signal collection circuit and a main control chip minimum system, voltage sensors which are used for detecting inductance voltage are arranged at two ends of tested inductance, a current sensor which is used for detecting tested inductance current is arranged, voltage at two ends of tested inductance and current passing the inductance are collected and fed back to the main controller for calculation and the inductance value under different power conditions can be found. The invention also discloses the main circuit of the high-power inductance testing device and a testing method of the high-power inductance testing device. The device, the method and the main circuit are suitable to test of high-power inductance, the actual inductance condition can be simulated, the inductance value in the full power range can be solved one time and inductance curves under different current can be drawn on a display directly.

Description

technical field [0001] The invention relates to inductance testing technology, in particular to a high-power inductance testing device and its main circuit and testing method. Background technique [0002] High-power inductive components are widely used in various industrial applications, such as generators, reactors and power transformers in power systems, motors in high-power AC drives, generators in renewable energy power generation systems and their power electronic conversion devices In the isolation transformer and filter inductor. In these high-power applications, inductive devices may need to carry hundreds, thousands, or even tens of thousands of amps. However, due to the nonlinear relationship between the magnetic permeability of the iron core and the magnetic field strength, that is, the excitation current, the inductance values ​​characterized under different excitation currents are not the same. In other words, the inductance value of the same inductive power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26
Inventor 汪海宁张健赖纪东苏建徽张国荣茆美琴
Owner HEFEI UNIV OF TECH
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