Inner screen continuous type coil adopting fractional turn integer winding method and winding method thereof

Abstract

The invention relates to an inner screen continuous type coil adopting a fractional turn integer winding method and a winding method thereof. The coil comprises operating wires and a shielding wire. The operating wires are two wires wound in parallel, the shielding wire is arranged between the interturn and wire space of the operating wires; at the wire segment changing position of the operating wires, one of the two operating wires wound in parallel winds one more circle and then moves upward to the next segment, and the other of the two operating wires wound in parallel directly moves upwardto the next segment, and accordingly an integer plus half turn structure is formed. The coil adopts two wires for winding, the number of turns of each segment is no longer limited to an integer turn,but to an integer plus half turn; filling rate of the coil is effectively improved, coil costs are reduced, longitudinal capacitance of the coil is effectively increased, turn insulation thickness ofthe shielding wire can be correspondingly smaller, and anti-short circuit capacity of the coil is enhanced while the filling rate is improved.

Description

technical field [0001] The invention relates to a manufacturing design of a transformer, in particular to an inner screen continuous coil adopting a fractional-turn integer winding method and a winding method thereof. Background technique [0002] At present, the continuous coils of the inner screen of the power transformer are mostly wound with integer turns, that is, the number of electrical turns of each segment of the wire cake is an integer. The screen wire is wound between turns, that is, the screen wire is wound between two turns, and generally spans two screens or four screens. In order to reduce the inter-turn field strength, the turn insulation of the screen wire will be thickened accordingly. And for coils with fewer turns per section, the number of turns per section of screen wire is naturally less. In order to increase the longitudinal capacitance of the coil, it is necessary to increase the number of inner screen segments, which increases the difficulty of wi...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art of power transformer inner screen continuous coils, which have thicker insulation of screen turns, low filling rate of less-turn sections, and more inner screen sections when the number of turns in each section of the coil is small, increasing the difficulty of winding, etc., the present invention The problem to be solved is to provide an inner screen using the fractional-turn integer winding method that increases the number of turns of the screen wire without increasing the number of turns of each section of the working wire, appropriately reduces the turn insulation of the screen wire, and improves the filling rate of the coil. Continuous coil and its winding method

Images