Patent ID: 6580188
Filing Date: 2003-06-17
Classification: B60L,B62M,G01R,H02J,H02K,Y02T,Y10T

Abstract:
An electric motor for adaptively applying additional driving force to a drive wheel of a moving apparatus driven by human power,the electric motor comprising: a rotor including a rotor housing and at least one rotor magnet, said rotor housing being affixed to said drive wheel so as to co-rotate with said drive wheel; a stator including an iron core and at least one winding, each said winding being made up of a multiple of drive coils, said stator being located within said rotor housing such that said rotor and said stator are coaxial about the motor axis; and radiating means integral to said stator, said radiating means comprising fins that are substantially parallel to the direction of movement of said moving apparatus, being operable to radiate heat produced by said motor, and acting as a bearing surface for said rotor; whereby said rotor magnet is attached to said rotor housing such that, with respect to the motor axis, said magnet is at a radial position outside the circumference of said stator.