| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency of a coreless electromechanical device by making electromagnetic coils of two phases substantially equal in electric resistance and inductance. <P>SOLUTION: There is provided the coreless electromechanical device, which includes a permanent magnet 200 arranged at a first member 20, air-core electromagnetic coils 100A, 100B of two phases arranged at a second member 15, and a coil back yoke 115 arranged at the second member. The electromagnetic coils 100A, 100B each have an effective coil area and a coil end area, the effective coil areas of the electromagnetic coils of the two phases being in the same shape and arranged on a cylindrical surface between the permanent magnet 200 and coil back yoke 115, and the coil end area of the electromagnetic coil 100A being bent in an inward direction or outward direction of the cylindrical surface. The electromagnetic coils of the two phases have the same electric resistance value. The coil back yoke 115 covers the effective coil areas, but does not cover the coil end areas. <P>COPYRIGHT: (C)2013,JPO&INPIT |
