an electromagnetic wire

Abstract

The invention discloses an electromagnetic wire, comprising a conductor and an insulating layer uniformly coating the outer side of the conductor, wherein a conductor cross section is square shaped, four corners of the conductor cross section are four fitted curves in smooth connection with four edges of the conductor cross section, and the four fitted curves are obtained by adopting a spline curve for fitting points at 1 / 6 to 5 / 6 of the vertical distance from all points on circular arcs of four arc-shaped chamfers corresponding to the four corners to the nearest side edges. According to the electromagnetic wire, the four corners of the square conductor cross section are designed into fitted curves, so that the insulating layer is reinforced at the fitted curves, thereby ensuring that insulation loss of a coil can be reduced to minimum during the winding process; and the space utilization factor is effectively improved while ensuring reliability, and the conductor resistance and power loss are reduced, thus the thermal radiation effect and thermal resistance can be improved.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to an electromagnetic wire. Background technique [0002] At present, most conventional squares have a square cross-section with rounded corners (hereinafter, a line having a cross-sectional shape with a square shape and four corners with arc-shaped chamfers is referred to as a "rounded square"). A flat magnet wire is made by covering a rounded flat wire as a conductor with an insulating layer. When such a flat magnetic wire is used to manufacture a coil, since the four corners of the conductor are rounded, there is still a large gap compared with a square without rounded corners, so the coil still has the disadvantage of low volume utilization factor. It is also known to manufacture magnet wires with square cross-section conductors in order to solve this disadvantage. [0003] However, it is also known that forming a rounded flat wire requires technical know-how diff...

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Problems solved by technology

On the other hand, in the case of rounded corners, if the radius of the rounded corner is too large, a so-called roll-off phenomenon occurs during the winding process, and as a result, the volume utilization factor becomes small and the performance deteriorates

[0007] In addition, due to the existence of rounded corners, its space utilization factor is still smaller than that of a square shape, and the resistance value in the coil is still high, and the power loss is still large and other problems.

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