A rotary actuator includes a motor, an output shaft, and a speed reducer. The motor includes a motor shaft rotating about an axial direction. The output shaft is disposed in parallel with the motor shaft. The speed reducer reduces a rotational speed of the motor and transmits rotation of the motor at a reduced rotational speed to the output shaft. The speed reducer includes a parallel-shaft type reducer that has a drive gear on the motor shaft and a driven gear on the output shaft. One side and the other side in the axial direction are defined as a first side and a second side, respectively. The motor is located on the first side of the speed reducer in the axial direction. The driven gear includes a teeth portion having a gear end surface on the first side of the teeth portion. The motor includes a stator having a stator end surface on the second side of the stator. The gear end surface is located on the first side of the stator end surface in the axial direction.

A stator assembly for a permanent magnet motor is disclosed. The assembly includes a yoke having a plurality of teeth in connection therewith and extending into an opening formed by the yoke. The plurality of teeth includes a first tooth and a second tooth. The first tooth is arranged adjacent to the second tooth about a rotational axis of the motor. The assembly further includes a first coil and a second coil. The assembly is configured to receive three winding phases including a first winding phase, a second winding phase, and a third winding phase. The first tooth and the second tooth form adjacent pairs of the stator teeth including two of the three winding phases, and the adjacent pairs of the stator teeth are distributed around the opening and form an opening configured to receive a rotor.

A manufacturing method for a coil includes: a step of winding a wire (conductive wire) in multiple layers and multiple rows and forming a coil having a trapezoidal cross-sectional shape; a step of arranging the coil in a molding space surrounded by a plurality of split dies; and a step of moving the slit die in a direction of narrowing the molding space to mold the cross-sectional shape of the coil. In the step of molding the cross-sectional shape, at least one of the plurality of split dies is moved to mold the cross-sectional shape into a fan shape by surfaces formed in the split dies.

Provided is a manufacturing method of a wire rod for forming a coil, the manufacturing method including the steps of: placing an element wire in a forming space surrounded by a plurality of split dies; and pressure-forming the element wire by moving the plurality of split dies in a direction of narrowing the forming space. In the step of pressure-forming the element wire, at least one of the plurality of split dies is moved, and the plurality of split dies each having a surface that changes in shape in a longitudinal direction of an element wire to pressure-form the element wire into the wire rod having a plurality of different cross-sectional shapes in the longitudinal direction.

A motor includes a rotor and a stator. The rotor is rotatably supported and includes a magnet. The stator is radially opposed to the rotor and includes a plurality of coils. Each of the coils is formed by winding an electrically-conductive conductor wire in a ring shape. The coils are arranged along a circumferential direction. Moreover, for each of the coils, the conductor wire forming the coil has a first end portion radially protruding from an inner peripheral portion of the coil and a second end portion radially protruding from an outer peripheral portion of the coil.

In a linear motor and the linear compressor having the same according to the present disclosure, a plurality of magnets are coupled to a stator equipped with a winding coil, and a mover core made of magnetic material instead of a permanent magnet is provided on the mover, and by the magnetizing plurality of magnets in the same direction, the motor output can increase by increasing thrust instead of decreasing the centering force for the mover core. In addition, as it is applied to a two-pore motor, it is possible to easily control the mover core and to easily perform an assembly operation and a magnetization operation for the magnet. In addition, as the stator is made of a grain-oriented core, core loss may be reduced and the motor efficiency may be improved.

A motor is provided that reduces noise and vibration, and a method is provided for manufacturing the motor and a cleaner having the motor. The motor includes a stator including a plurality of teeth that are spaced apart from each other in a predetermined interval in a circumferential direction and a coil that is wound around the plurality of teeth, a rotor that is disposed inside the stator, and a cage that is disposed in at least one of a plurality of slots that are formed between the plurality of teeth. The cage is configured to include a flow path to inject a bonding agent into at least one slot.

An electrical machine for use in an aircraft. The electrical machine includes a rotor that includes a plurality of rotor poles, and a stator including a plurality of phases. Each respective phase occupies at least one elementary block. The at least one elementary block of each phase includes a set of conductors of the respective phase wound around a plurality of slots of the respective elementary block in a concentrated winding configuration. The stator further includes at least one sensor located between two elementary block. The at least one sensor being configured to measure at least one parameter of the rotor.

A laundry appliance includes a tub having a rear wall that includes a plurality of structural ribs. A drive hub has a bearing housing insert injection molded into the rear wall. A stator is attached to the drive hub at stator fastening portions exposed through the rear wall of the tub. A reinforcing cap is fixed to the structural ribs of the rear wall of the tub. The bearing housing of the drive hub extends rearwards through a portion of the reinforcing cap. The stator fastening portions are exposed through the reinforcing cap.

An embodiment provides a stator comprising a stator core having a plurality of teeth and coils wound around the teeth, wherein the tooth includes a body around which the coil is wound and a shoe connected to the body, the shoe includes a plurality of grooves and a curvature center of the inner peripheral surface of the shoe is the same as the center of the stator core.