E-type magnetic core inductor test tool

Abstract

The invention discloses an E-type magnetic core inductor test tool comprising a pedestal, a framework, an upper spring pressing plate, a lower spring pressing plate and an LCR inductor tester. The lower elastic pressing plate is fixed on the pedestal. The framework is fixed exactly above the lower spring pressing plate via an insulating support. The upper spring pressing plate is fixed exactly above the framework. The upper spring pressing plate and the lower spring pressing plate are connected via an elevating guide column. The bottom part of the lower spring pressing plate is provided with at least two limiting convex columns which are used for fixing the bottom parts of E-type magnetic cores to be tested. The center of the framework is provided with a center through hole enabling the center columns of the E-type magnetic cores to be tested to pass. The external periphery of the framework is wound by a coil. The two ends of the coil are connected with the LCR inductor tester. The pedestal is provided with elevating control buttons. After application of the aforementioned structure, pressing force of the bottom parts of the two E-type magnetic cores can be controlled by controlling spring restoring force of the upper spring pressing plate and the lower spring pressing plate, and pressing force is uniform so that test results are accurate and reliable.

Description

technical field [0001] The invention relates to an auxiliary test device in the production process of electronic components, in particular to an E-type magnetic core inductance test tool. Background technique [0002] Inductors use E-type magnetic cores, and they need to be paired when used. Due to sintering and grinding, some E-core inductors may not meet the specified inductance requirements. Therefore, before leaving the factory or assembling and producing inductors, it is necessary to test or sort all the inductances of the shipped or used batches of E-type magnetic cores, and sort out the magnetic cores whose inductance does not meet the requirements. [0003] When testing the inductance of the existing E-shaped magnetic core, the test tool is very simple, such as manually winding a coil with several turns, and directly installing the coil on the center column of one of the E-shaped magnetic cores, and testing the inductance between the two ends of the coil and the LCR...

AI Technical Summary

Problems solved by technology

It often happens that the inductance test is qualified before leaving the factory or before use, but the inductance assembled on the line is unqualified.

[0007] 3. The coil is in direct contact with the E-type magnetic core. Since the corners of the E-type magnetic core are relatively sharp, it is easy to pierce the outer insulation of the coil, resulting in inaccurate test results and short service life of the coil.

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