Abstract: A method of molding a resin casing covering a stator of a motor may include preparing first and second molds; disposing the stator in the first mold; combining the molds; pouring a resin into the cavity; curing the resin; separating the molds; and taking the stator and resin casing from the mold. The stator may include a core, an insulator, and a coil. The core may include a core back surrounding and teeth that extend inward from the core back. The insulator may include wall portions inside the coil. The wall portions may be provided around the teeth and extend toward one side in an axial direction. One of the molds may include cylindrical surfaces contacting inner end faces of the teeth. The first mold may include wall supporting surfaces contacting or facing the inner surfaces of the wall portions. The wall supporting surfaces may be outside the cylindrical surfaces.

Abstract: A method of molding a resin casing covering a stator of a motor may include preparing first and second molds; disposing the stator in the first mold; combining the molds; pouring a resin into the cavity; curing the resin; separating the molds; and taking the stator and resin casing from the mold. The stator may include a core, an insulator, and a coil. The core may include a core back surrounding and teeth that extend inward from the core back. The insulator may include wall portions inside the coil. The wall portions may be provided around the teeth and extend toward one side in an axial direction. One of the molds may include cylindrical surfaces contacting inner end faces of the teeth. The first mold may include wall supporting surfaces contacting or facing the inner surfaces of the wall portions. The wall supporting surfaces may be outside the cylindrical surfaces.

Abstract: An inner rotor motor may include a shaft, a rotor, a stator, an upper bearing, a lower bearing, a motor casing that includes an opening at an upper portion, a casing cover that holds the upper bearing and covers the opening of the motor casing, and a lower damping member. The motor casing may include a cylindrical portion, a bottom wall portion that extends inward from the cylindrical portion, and a lower boss portion that is formed in the shape of a bottomed cylinder protruding downward from a bottom of the bottom wall portion. The lower bearing is disposed inside the lower boss portion, and the lower damping member is disposed outside the lower boss portion ion. The lower boss portion is provided with a lower boss recess, and the lower damping member is provided with a concave or convex rotation prevention portion.

Abstract: A method for manufacturing a resin molded stator may include: preparing a straight winding core in which neighboring partial core backs are coupled by a joint; bending the core at joints and causing distal ends of teeth to face an outer peripheral surface of a core metal to obtain a core metal assembly including a stator mounted on the core metal, arranging the core metal assembly in a mold; injecting resin into the mold, covering windings with resin, curing the resin; and removing the stator from the mold and the core metal. The core metal may include a plurality of ribs projecting outward from the outer peripheral surface, the number of the ribs being between three and the number of the teeth. Each rib may extend parallel to a center axis, and each rib may be located in a gap between the distal ends of adjacent teeth.

Abstract: A motor includes a casing which is a resin molded article produced by using a core-back, a plurality of teeth, an insulator, a coil, a metal terminal, and a protection member as inserts. The protection member includes a cover section through which the metal terminal penetrates in the axial direction. The protection member or the insulator includes a post section arranged to axially extend in a portion of a surrounding of the metal terminal. A connection space within which a connection point of the metal terminal and the lead wire is disposed is provided between the cover section and the insulator and at the side of the metal terminal from the post section. The lead wire is arranged to reach the connection space through an opening arranged in the post section.

Abstract: A motor drive device includes a constant voltage power supply and a motor drive control unit. The constant voltage power supply includes an AC/DC converter, a zero-cross detector, a switching control unit and a switching regulator. The AC/DC converter converts an AC voltage supplied from an AC voltage source into a DC voltage. The zero-cross detector detects a zero-cross point of the AC voltage, and outputs a zero-cross detection signal. The switching control unit outputs a switching control signal based on the zero-cross detection signal. The switching regulator has a switching element. The motor drive control unit outputs a motor drive signal for driving a motor to the inverter. The AC/DC converter has a rectifier circuit and a smoothing capacitor. The switching regulator performs switching on a first DC voltage in accordance with the switching control signal at a timing corresponding to the zero-cross point.

Abstract: A motor driving device includes a microcomputer, a command voltage adjusting circuit, and a driving IC. The command voltage adjusting circuit converts a first command voltage signal from the microcomputer to a second command voltage signal. The driving IC generates a drive pulse based on the second command voltage signal. An upper and a lower limit of an input voltage range of the driving IC are larger than an upper and a lower limit of a voltage range of the first command voltage signal, respectively.

Abstract: A motor includes a casing which is a resin molded article produced by using a core-back, a plurality of teeth, an insulator, a coil, a metal terminal, and a protection member as inserts. The protection member includes a cover section through which the metal terminal penetrates in the axial direction. The protection member or the insulator includes a post section arranged to axially extend in a portion of a surrounding of the metal terminal. A connection space within which a connection point of the metal terminal and the lead wire is disposed is provided between the cover section and the insulator and at the side of the metal terminal from the post section. The lead wire is arranged to reach the connection space through an opening arranged in the post section.