| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner-rotor type cylindrical core-less motor which is capable of restraining eddy current loss and has less heat generation and a small outside diameter, by using silicon steel plate which can be generally used only in a circular punching molded body laminating mode in the housing case material of the motor as a multiple-layer film sheet laminated body. SOLUTION: In this cylindrical core-less motor having an inner rotor of a cup-shaped magnetic field coil, the housing case of the motor positioned at the outer periphery of the magnetic field coil is formed out of high-permeability material, and is a housing structure formed by using the cylindrical thin multi- layer film laminated body wound with at least a plurality of layers of sheet- shaped thin belts. COPYRIGHT: (C)2003,JPO
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