Patent ID: 6239532
Filing Date: 2001-05-29
Classification: H02K

Abstract:
An inside out motor comprising:a rotor including a concave member, a shaft defining a longitudinal axis mounted on the concave member and a magnet mounted on an interior surface of the concave member, said magnet being spaced from the shaft and extending circumferentially on the concave member around the longitudinal axis of the shaft;a bearing receiving the shaft for rotatably mounting the rotor;a stator assembly mounted on said bearing, the stator assembly including a bobbin mounted generally coaxially with the rotor shaft and having an interior diameter, an exterior diameter, a first axial end and a second axial end, a winding wound on the bobbin and extending around the axis of the rotor shaft, the winding having a width in a direction parallel to the lengthwise extension of the rotor shaft, plural separate ferromagnetic members on each of the first and second axial ends of the bobbin, each ferromagnetic member having a radially outer leg extending generally between the winding and the magnet, the outer legs of the ferromagnetic members on the first axial end of the bobbin extending generally from the first axial end of the bobbin toward the second axial end and the outer legs of the ferromagnetic members on the second axial end of the bobbin extending generally from the second axial end toward the first axial end,the ferromagnetic members on each of the first and second axial ends being disposed in angularly spaced, non-overlying positions around the longitudinal axis with respect to the other ferromagnetic members on the same axial end.