Primary coil of CVT intermediate transformer and manufacturing method of primary coil

Abstract

The invention relates to a primary coil of a CVT intermediate transformer and a manufacturing method of the primary coil. The primary coil comprises two segments of coils, namely two parts of a line segment and the line segment with a tap, which are arranged in parallel, wherein the line segment and the line segment with the tap comprise independent insulating layers; a line segment insulating plate is placed between two line segments, namely the line segment and the line segment with the tap, with the independent insulating layers; the line segment is electrically connected with the line segment with the tap through a line segment connection line; and the method comprises the steps as follows: the line segment and the line segment with the tap are wound and then are independently wrapped with insulating materials respectively; the line segment insulating plate is placed between the line segment and the line segment with the tap; the line segment is electrically connected with the line segment with the tap through the line segment connection line; and the line segment and the line segment with the tap are connected and then are wrapped in an insulating manner to form the complete primary coil. The primary coil is designed in the two line segments; the primary coil is easy to implement on a full-automatic winding machine; the production efficiency is double that of the whole primary coil; the voltage distribution is relatively uniform; the interlayer insulation strength is improved; the local discharge level is lowered; and the primary coil can be easily carried by hands.

Description

technical field [0001] The invention relates to a transformer manufacturing technology, in particular to a primary coil of a CVT intermediate transformer and a manufacturing method thereof. Background technique [0002] The primary coil of the CVT intermediate transformer, that is, the electromagnetic unit, generally adopts a whole winding coil structure. This structure is limited in winding efficiency due to the large number of turns and wide winding distance when the automatic winding machine winds the coil. The voltage between coil layers is high, so the requirements for layer insulation are high, and it is difficult to carry the entire primary coil by hand. Contents of the invention [0003] In view of the above-mentioned defects in the structure of the primary coil of the CVT intermediate transformer in the prior art, the technical problem to be solved by the present invention is to provide a CVT intermediate transformer with high winding efficiency, low voltage betwe...

AI Technical Summary

Problems solved by technology

The voltage between coil layers is high, so the requirements for layer insulation are high, and it is difficult to carry the entire primary coil by hand.

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