Stator

• Main Authors: Paul David Flower, Dipesh Varsani
• Format: Patent
• Language: English
• Published: 27.12.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

A stator for an electric machine comprising: a stator core 210 with back iron, teeth 211, 212 arranged in a circular array defining a plurality of stator slots 213; a winding 221 wound around a first stator tooth 211; and between the winding 221 and a second stator tooth 212, or perhaps a second winding 222 on the second tooth, a separator member 230 which may include a thermally-activated expandable material 232. When activated, the material expands and exerts a force on the winding towards the first stator tooth, and perhaps on the second winding towards the second tooth. The separator may have the expanding foam in a layer between a carrier or support 231, and an insulating layer 233, and may also include a slot closer or plug 234. The expandable material may be a foamable composite such as a syntactic foam. The coil may be wound in place before the separator is fitted and expanded. Potting compound may be applied. The pressure applied on the winding by the foam may help thermal conduction from the winding into the stator tooth.