Test transformer

A technology for testing transformers and primary coils, which is applied in the direction of transformers, variable transformers, variable inductors, etc., and can solve the problems of small application range and low reliability

Active Publication Date: 2019-04-16
特变电工湖南电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a test transformer for the prob

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described more comprehensively through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] In one embodiment, see figure 1 , the test transformer includes: an iron core 300, a primary coil 100 and a secondary coil 200, the primary coil 100 and the secondary coil 200 are arranged around the iron core 300 respectively, the number of turns of the primary 100 coil and / or the secondary coil 200 is adjustable, To change the turns ratio between the primary coil 100 and the secondary coil 200 . Specifically, the function of the iron core 300 is to strengthen the magnetic coupling between the primary coil 100 and the secondary coil 200. In order to reduce the eddy curre...

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Abstract

The application relates to a test transformer, which comprises an iron core, a primary coil and a secondary coil. The primary coil and the secondary coil are arranged around the iron core. The numberof turns of the primary coil and/or the number of turns of the secondary coil are/is adjustable so that the turn ratio between the primary coil and the secondary coil can be changed. When an alternating current is applied to the primary coil of the test transformer, an alternating-current magnetic flux will be generated in the iron core to induce a voltage in the secondary coil. The number of turns of the primary coil and/or the number of turns of the secondary coil are/is adjustable. Specifically, the number of turns of the primary coil can be adjusted, the number of turns of the secondary coil can also be adjusted, and the number of turns of the primary coil and the number of turns of the secondary coil can be adjusted at the same time, so as to change the turn ratio between the primarycoil and the secondary coil and achieve the purpose of voltage regulation. Therefore, the voltage requirements for test of different test objects are met, and the working reliability of the test voltage is improved.

Description

technical field [0001] The present application relates to the field of electric engineering and transformer technology, in particular to a test transformer. Background technique [0002] With the vigorous development of China's electrical technology, more and more electrical equipment has been widely used. After leaving the factory, handover or overhaul of electrical equipment, an AC temperature rise test should be carried out to actually assess the overcurrent withstand capacity of the equipment. The test transformer is the basic test equipment used for AC tests by users such as power plants, power supply bureaus and scientific research units. Assess the heat-resistant insulation level of the product, find the insulation defect of the tested product, and measure the ability of overcurrent to ensure the working performance of the tested product. [0003] The existing test transformer has a basic structure and a single function. When testing different tested products, diffe...

Claims

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Application Information

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IPC IPC(8): H01F29/02
CPCH01F29/02
Inventor 许钎易梅生李政王亚钦付军吴华林梁建宇
Owner 特变电工湖南电气有限公司
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