Patent ID: 8471661
Filing Date: 2013-06-25
Classification: H01F,Y10T

Abstract:
1. A method for manufacturing a coil including electrically conductive winding wire, the method comprising: placing a cooling tube for coolant circulation, in a groove provided in a surface of the winding wire and running substantially in a direction of a longitudinal axis of the winding wire such that the cooling tube will be embedded at least partly in the groove; and winding the winding wire and the cooling tube in turns around a core in at least two layers, wherein an outermost winding wire layer is wound relative to the core such that the groove provided in the surface of the winding wire of the outermost winding wire layer opens away from the core, whereby the cooling tube placed in the groove is positioned around the outermost winding wire layer and covers the outermost winding wire layer at least partly; and winding an innermost layer of the winding wire relative to the core such that the groove provided in the surface of the winding wire in the innermost layer opens towards the core, and the cooling tube placed in the groove is positioned between the innermost winding wire layer and the core.