A current transformer for aviation generator

Abstract

The present invention proposes a current transformer for an aero-generator, comprising a terminal board assembly, a transformer assembly, a fixing bracket and an insulating gasket; three grooves are arranged on the terminal board assembly; There is a U-shaped iron core assembly embedded in the assembly; there is also a connection hole for connecting the generator wire in each groove, and the three connection holes are connected through the deflector embedded in the wiring board assembly; The transformer assembly includes a coil skeleton, a coil, an in-line iron core and lead wires. The in-line iron core is placed on the two end faces of the opening end of the U-shaped iron core assembly, and a certain gap is arranged between the contact surfaces of the two. Thick insulating spacers. In the present invention, the traditional annular iron core is designed with a U-shaped and a straight structure, and an air gap is arranged on the mating surface of the U-shaped and straight-shaped structure, so as to increase the magnetic resistance of the secondary coil magnetic circuit, which can significantly improve the The number of coil turns of the current transformer is reduced, which solves the process bottleneck problem that the annular iron core winding cannot be arranged.

Description

technical field [0001] The invention belongs to the technical field of differential protection of aviation power supply systems, and relates to a current transformer for aviation generators. Background technique [0002] In the current aviation power supply system, in order to ensure that the power generation system has a differential protection function, two current transformers need to be installed between the generator end and the external line. This structure is simple, and is suitable for power generation systems that require a small number of coil turns according to the system index. When the number of turns of the coil is calculated according to the system index, the coil with too many turns cannot be wound on the annular iron core. The winding structure cannot meet the system design index, and a new type of current transformer for aero-generator needs to be designed. Contents of the invention [0003] The purpose of the present invention is to provide a current tr...

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Problems solved by technology

[0002] In the current aviation power supply system, in order to ensure that the power generation system has a differential protection function, two current transformers need to be installed between the generator end and the external line. This structure is simple, and is suitable for power generation systems that require a small number of coil turns according to the system index. When the number of turns of the coil is calculated according to the system index, the coil with too many turns cannot be wound on the annular iron core. The winding structure cannot meet the system design index, and a new type of current transformer for aero-generators needs to be designed.

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