Low-inductance annular magnetic core inductance sorting tool

Abstract

The invention discloses a low-inductance annular magnetic core inductance sorting tool, which comprises a metal base, an annular magnetic core, an inductance tester and a metal post, wherein the annular magnetic core is wound with metal conducting wires and is a magnetic field source, the metal post, a metal cover and an uncovered metal box are in contact and jointly form a closed magnetic circuit, the uncovered metal box is matched with an annular insulation cover, the metal cover is movably matched with the annular insulation cover, the metal post sequentially passes through the metal cover, the annular insulation cover, the annular magnetic core and the uncovered metal box from top to bottom, holes are formed in the side edge of the uncovered metal box, and the metal conducing wires wound on the annular magnetic core are allowed to pass through the holes. Through the adoption of the structure, the height of the metal cover is decreased, the weight is reduced, and the testing operation is more labor-saving and is more convenient; and the holes are formed in the side edge of the uncovered metal box, so that the metal conducting wires can be fixed and do not need to be replaced to and fro and wound repeatedly, and in addition, the service lives of the metal conducing wires are prolonged.

Description

technical field [0001] The invention relates to an inductance sorting tool for a small inductance ring magnetic core. Background technique [0002] Small inductance ring cores, especially nickel-zinc ferrite cores, have a single-turn inductance unit at the nH level, and the existing inductance tester basically cannot directly test it; in order to test its inductance and avoid instrument and test errors, multiple turns are required The metal wire usually has more than 50 turns; after the test is completed, the winding wire is removed. The test is very inconvenient, time-consuming, laborious, inefficient, and a lot of wires are wasted. [0003] Chinese Invention No. 201120445738.0 published on July 11, 2012 (hereinafter referred to as the reference document), discloses a sorting tool for toroidal core inductance; the sorting tool includes a toroidal core wound with a metal wire, and a Inductance tester, metal column, metal table, ring insulation cover, base, etc. [0004] Th...

AI Technical Summary

Problems solved by technology

[0004] This structure can basically complete the inductance sorting of small inductance ring cores, but in use, due to the high height and heavy weight of the metal cover, the metal cover needs to be removed from the metal column and put back for each test; long-term testing After the test, the tester's hand will feel sore and swollen

[0005] In addition, when the metal cover is closed, the metal wire wound on the magnetic ring will be rubbed back and forth, causing the insulation layer to fall off, and the metal wire needs to be replaced and rewound frequently, which is inconvenient to use

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