Patent ID: 8215001
Filing Date: 2012-07-10
Classification: H02K,Y10T

Abstract:
1. A method of manufacturing a stator for an inner-rotor type rotary electric machine, the stator including a stator core having an inner peripheral surface in which a plurality of slots are formed, and a cage stator coil having slot-accommodated conductor portions to be accommodated in the respective slots and a top coil end portion and a base coil end portion, each of the top coil end portion and the base coil end portion being formed by grouping coil end conductor portions each connecting end portions of the slot-accommodated conductor portions, the method comprises the steps of: preparing a tapered cage coil that includes the top coil end portion having a diameter smaller than that of the inner peripheral surface of the stator core, the base coil end portion having a diameter larger than the inner peripheral surface of the stator core, and the slot-accommodated conductor portions obliquely extended from the top coil end portion toward the base coil end portion in a direction of increasing distance from an axis of the tapered cage coil; inserting the tapered cage coil headfirst into the stator core along an axial direction with the top coil end portion as being a head; and shaping the stator coil as a complete form by having the top coil end portion projected from an end face of the stator core, followed by deforming the slot-accommodated conductor portions radially outward, and pushing the slot-accommodated conductor portions into the respective slots.