Abstract: The present invention is to provide a stator for external rotor type motor, enabling to manufacture a motor with a high viscosity rate by allowing a unit tooth of a stator to be partially separated from an adjacent tooth. In order to accomplish the object of the present invention, there is provided a stator for external rotor type motor, comprising: a unit yoke; and a plurality of unit modules including a unit tooth extensively formed on the unit yoke, wherein the plurality of unit modules is continuously formed in a ring shape, and the unit yoke includes a connection part connected to an adjacent unit yoke, and a dividing part separated from the adjacent unit yoke, and one unit module in the plurality of unit modules is mutually separated from the adjacent unit module by a cutting part.

Abstract: A motor includes: a first slot and a second slot in which a first current having the same phase flows, the first slot including a first coil end portion in which a current flows in a first direction and a second coil end portion in which a current flows in the opposite direction of the first direction, and the second slot including a third coil end portion in which a current flows in the second direction and a fourth coil end portion in which a current flows in the first direction, a stator forming a fixed magnetic field by the first current, and a rotor forming a rotating field and rotated according to an interaction with the fixed magnetic field formed by the stator.

Abstract: A stator coil of a slotless motor is disclosed in which the stator coil is formed in such a manner that respective both distal ends of two unit coil bodies, each unit coil body arranged to face each other, are respectively coupled to form a plurality of circular coil bodies, each circular coil body having a different inner diameter, and a circular coil body having a smaller inner diameter is sequentially inserted into an inner side of a circular coil body having a larger inner diameter, whereby a horizontal width of the plurality of unit coil bodies of U, V and W phases is equal there among to cause the strength of the magnetic field of U, V and W phases to be equal, and to allow the stator to be accurately manufactured, thereby catering to a designer's intention and markedly simplifying the assembly processes.

Abstract: A stator coil of a slotless motor is disclosed in which the stator coil is formed in such a manner that respective both distal ends of two unit coil bodies, each unit coil body arranged to face each other, are respectively coupled to form a plurality of circular coil bodies, each circular coil body having a different inner diameter, and a circular coil body having a smaller inner diameter is sequentially inserted into an inner side of a circular coil body having a larger inner diameter, whereby a horizontal width of the plurality of unit coil bodies of U, V and W phases is equal there among to cause the strength of the magnetic field of U, V and W phases to be equal, and to allow the stator to be accurately manufactured, thereby catering to a designer's intention and markedly simplifying the assembly processes.

Abstract: A claw-pole PM stepping motor includes a module that is formed in such a manner that a first driving unit and a second driving unit are symmetrically arranged with respect to a first claw-pole and a second claw-pole each oppositely disposed at a main yoke member internally disposed to substantially divide an inside of a housing, an inner portion of which is rotatably inserted and supported by a rotary shaft, and the first driving unit and the second driving unit have magnet rotors coaxially arranged to generate electromagnetic force; sub-yoke members; and coil bobbins. The claw-pole PM stepping motor is exempted from a structure where coil bobbins are concentrically arranged at a periphery of magnet rotors, and instead the coil bobbins are coaxially arranged and shifted from each other from the corresponding magnet rotors, such that a miniaturized motor with a reduced outer diameter can be embodied.