Abstract: A DC motor with an armature coil for generating rotational torque capable of improving motor efficiency and generated torque while achieving size and thickness reductions, comprising magnets 23A to 23D and armature coils 31A to 31C, 32A to 32C, wherein, for example, a magnet portion is used as a rotor 12. A stator 13 at an armature coil portion comprises an inner coil group formed by arranging, parallel with each other, hollow inner coil bodies 31A to 31C on peripheral side surfaces of a magnet yoke 22 and the magnets 23A to 23D as a virtual disc by a prescribed quantity and an outer coil group formed by arranging, parallel with each other, a prescribed number of hollow outer coil bodies 32A to 32C while covering the inner coil group. The peripheral side surface of the inner coil group is made externally flush with the peripheral side surface of the outer coil group.

Abstract: To realize a small-sized coreless motor featuring excellence in responsiveness and controllability, capability of obtaining greater rotating torque compared with driving power supplied to the coil, great intensity, ease in assembly and high energy efficiency, a coreless motor of the present invention comprising; each of coils 8, 8 comprises a flat portion, which consists of a winding unit that confronts the upper and lower faces of a ring-shaped magnet 5 and whose plane part forms an arc shape, and a curved-and-folded portion, which consists of a winding unit that confronts the external circumstance side face of the magnet, with the section from one end of the lead wire constituting these winding units to the other end being arranged to compose a continuous, hollow unit; wherein the flat portion in the lower part of these coils 8, 8 is fitted to thin-sheet-shaped flange 9a below coil holder 9, which is installed around the rotating axis 4, so that multiple coils are arranged along the external circumference d

Abstract: To realize a small-sized coreless motor featuring excellence in responsiveness and controllability, capability of obtaining greater rotating torque compared with driving power supplied to the coil, great intensity, ease in assembly and high energy efficiency, a coreless motor of the present invention comprising; each of coils 8, 8 comprises a flat portion, which consists of a winding unit that confronts the upper and lower faces of a ring-shaped magnet 5 and whose plane part forms an arc shape, and a curved-and-folded portion, which consists of a winding unit that confronts the external circumstance side face of the magnet, with the section from one end of the lead wire constituting these winding units to the other end being arranged to compose a continuous, hollow unit; wherein the flat portion in the lower part of these coils 8, 8 is fitted to thin-sheet-shaped flange 9a below coil holder 9, which is installed around the rotating axis 4, so that multiple coils are arranged along the external circumference d