Patent ID: 7536770
Filing Date: 2009-05-26
Classification: H02K,Y10T

Abstract:
1. A winding method for a stator of an electric motor, the method comprising: providing a nozzle for supplying a conductor; a first winding step of winding a first coil around a first magnetic pole of the stator, the first coil comprising the conductor supplied by the nozzle, the coil being wound by rotating the nozzle relative to the magnetic pole, such that the nozzle passes through a slot between the first magnetic pole and an adjacent magnetic pole; retracting the nozzle from the slot when the slot has approximately the same width as an outer diameter of the nozzle; and a second winding step of winding a second coil in series on the first coil according to a hook winding method, the hook winding method comprising: providing at least one first hook on a first side of the first magnetic pole and at least one second hook on a second side of the first magnetic pole opposite the first side, the first and second sides having a first end adjacent to a first slot and a second end adjacent to a second slot, positioning the nozzle adjacent to the first end on the first side of the first magnetic pole, adjacent to the first slot, positioning the first hook between the first slot and the second slot on the first side of the first magnetic pole, moving the nozzle to a position adjacent to the second slot on the first side of the first magnetic pole, such that the first hook catches the conductor from the nozzle, moving the nozzle from the first side to the second side of the first magnetic pole, depositing the conductor by retracting the first hook and releasing the conductor, positioning the second hook between the second slot and the first slot on the second side of the first magnetic pole, moving the nozzle to a position adjacent to the first slot on the second side of the first magnetic pole, such that the second hook catches the conductor, moving the nozzle from the second side to the first side of the first magnetic pole, and depositing the conductor by retracting the second hook and releasing the conductor.