Patent ID: 6971152
Filing Date: 2005-12-06
Classification: H02K,Y10T

Abstract:
1. A method for producing a plurality of synchronous motors of different kinds, each having a stator formed by stacking stator cores and a rotor with permanent magnets, comprising: preparing a group of stators that can be used in common, each stator being formed by stacking stator cores of identical shape so that heights of the stators are different from one another, the heights being equal to integer multiples of a predetermined height in accordance with predetermined output torque specification values and predetermined rotor inertia specification values; preparing a plurality of groups of rotors so that lengths of the rotors in each group are different from one another, the lengths being equal to integer multiples of a predetermined length in accordance with predetermined rotor inertia specification values, said rotors in each group being provided with permanent magnets having a residual magnetic flux density different from that of permanent magnets of the rotors in another group in accordance with predetermined output torque specification values; selecting a stator from said group of the stators prepared previously and a rotor from said groups of the rotors prepared previously in accordance with a preset output torque specification value and a preset rotor inertia specification value; changing the stator height and the rotor length to thereby alter either the torque specification value or the rotor inertia specification value; and combining the selected stator with the selected rotor.