Abstract: A rotor includes a shaft extending in an axial direction, a cylindrical magnet portion provided at an outer peripheral portion of the shaft, a cylindrical scattering-prevention member provided so as to cover an outer peripheral surface of the magnet portion, a first balancing member provided at one end of the magnet portion in the axial direction, and a second balancing member provided at the other end of the magnet portion in the axial direction from which one end side of the shaft extends in the axial direction and having a diameter smaller than the inner diameter of the scattering-prevention member and the second balancing member has an end surface in contact with the magnet portion, the end surface being not surrounded by the scattering-prevention member.

Abstract: A motor includes a rotor main body supported by a rotary shaft, and a stator. The stator includes: a stator core having a first end surface that is one end surface in an axial direction of the rotary shaft, and a second end surface that is the other end surface in the axial direction, a length of the stator core in the axial direction being less than a length of the rotor main body in the axial direction; at least one flux capture member disposed on at least one of the first end surface and the second end surface and made of magnetic material, the at least one flux capture member capturing a magnetic flux of the rotor main body; and a molded resin portion covering the at least one flux capture member and the stator core.

Abstract: An electric blower includes a motor, a fan to generate a first air current, a fan to generate a second air current, and a housing. The first air current and the second air current are exhausted from the housing in opposite directions to each other in the axial direction.

Abstract: A stator includes four split cores arranged in the circumferential direction. Each split core includes a yoke including a pair of joint parts, and a tooth. The shape of an end of the tooth is asymmetrical. An angle ?1 (degrees) formed by a side surface of the tooth and a side surface of the yoke on the inner side in the radial direction of the stator satisfies 90 degrees<?1<180 degrees.

Abstract: An electric motor includes a rotor having 10×N (N is an integer equal to or larger than 1) magnetic poles and a stator including 9×N teeth. A center tooth includes a first main body and a first tooth end portion. A downstream-side tooth includes a second main body and a second tooth end portion. The electric motor satisfies TCR>TBR, where TCR is a maximum length of the first upstream-side portion in the first upstream-side radial direction of the first tooth end portion and TBR is a maximum length of the second upstream-side portion in the second upstream-side radial direction of the second tooth end portion.

Abstract: A motor includes a rotor, a stator surrounding the rotor, a circuit board attached to the stator, a mold resin part covering the stator and the circuit board, a lead wire connected to the circuit board and drawn out of the mold resin part, and a cover member provided on the mold resin part and made of a resin. The cover portion and an outer circumferential surface of the mold resin part form a housing space in which the lead wire is housed. The cover portion has a hole portion through which the lead wire is drawn out of the housing space.

Abstract: A rotor includes a rotary shaft, a first permanent magnet supported by the rotary shaft, and a second permanent magnet supported by an outer periphery of the first permanent magnet and having a magnetic pole stronger than a magnetic pole of the first permanent magnet . The second permanent magnet includes a plurality of magnet parts arranged at intervals in a circumferential direction of the first permanent magnet. A first width as a width in the circumferential direction of each of the plurality of magnet parts at a central part of the first permanent magnet in an axial direction of the rotary shaft is wider than a second width as a width in the circumferential direction of each of the magnet parts at an end part of the first permanent magnet in the axial direction.

Abstract: A blower includes a rotor that includes a shaft, a rotor core in an annular shape about at a central axis of the shaft, and permanent magnets attached to the rotor core. The permanent magnets form magnet magnetic poles, portions of the rotor core form virtual magnetic poles, and a number of magnetic poles including the magnet magnetic poles and the virtual magnetic poles is P. The blower includes a stator that surrounds the rotor from outside in a radial direction about the central axis and includes S slots arranged in a circumferential direction about the central axis, and N blades that are attached to the shaft and arranged in the circumferential direction. A combination of the number P of magnetic poles and the number S of slots is one of P=8 and S=9, P=10 and S=9, P=10 and S=12 and P=14 and S=12. The number N of blades is an integer greater than or equal to 2 and less than or equal to 10 excluding integral multiples of P/2.

Abstract: An electric blower includes a motor, a first rotor blade provided on one end side of the motor in an axial direction, a second rotor blade provided on another side of the motor opposite to the first rotor blade in the axial direction, and a first stator blade provided to face the first rotor blade.

Abstract: An electric motor includes a stator including four split cores, and a rotor having four magnetic poles. Each of the split cores includes a yoke and a tooth. An angle ?1 [degree] formed by a side surface of the tooth and a side surface of the yoke on an inner side in a radial direction of the stator satisfies 90 degrees ??1<180 degrees.

Abstract: A stator includes a stator core having a core back in an annular shape about an axis, and a nonmagnetic mold resin part surrounding the stator core from outside in a radial direction about the axis. The stator core has a core-back gap passing in the radial direction through at least a part of the core back in a circumferential direction about the axis. The mold resin part reaches an inner side of the core back in the radial direction from an outer side of the core back in the radial direction through the core-back gap.

Abstract: An outdoor unit includes a motor. The motor includes a rotor having a rotor core and a permanent magnet fixed to the rotor core, the permanent magnet forming a magnet magnetic pole, a part of the rotor core forming a virtual magnetic pole, and a stator surrounding the rotor. The outdoor unit further includes a frame holding the motor, a support body supporting the frame, a unit housing in which the frame and the support body are housed, and a nonmagnetic body disposed between the support body and the unit housing.

Abstract: A rotor includes a rotary shaft, a rotor core including a first core part and a second core part arranged to adjoin each other in a circumferential direction, and a permanent magnet provided in the first core part. A virtual magnetic pole is formed in the second core part. The first core part includes a cavity portion formed on an inner side in a radial direction of the rotor core relative to the permanent magnet. The cavity portion includes a first portion whose width in the circumferential direction increases toward the rotary shaft. A surface defining the cavity portion, being located on an innermost side of the cavity portion in the radial direction and facing outward in the radial direction is located on the inner side in the radial direction relative to an innermost portion of the second core part in the radial direction.

Abstract: A rotor has magnetic poles and a stator has the same number of teeth. Each tooth has first and second side portions in first and second directions in a circumferential direction, and a tooth tip facing the rotor. First and second protruding portions protrude in the first and second directions from the first and second side portions on the tooth tip side. The tooth tip has a first end having a gap G1 with the rotor and a second end having a gap G2 (>G1) with the rotor. A reference line passes through a rotation axis and perpendicular to a radial straight line passing through a middle position between both side portions. From the reference line, a distance D1 a border between the first protruding portion and the first side portion is longer than a distance D2 to a border between the second protruding portion and the second side portion.

Abstract: An electric blower includes a motor unit, a shaft, a centrifugal impeller, a fan cover, a motor unit case, and a bracket located away from centrifugal impeller and toward motor unit in a direction in which a central axis of the shaft extends. The bracket includes a first portion located outward of the vent in a radial direction, and a second portion located outward of the first portion and outward of an outer circumference of the motor unit case in the radial direction. A first airflow passage and a second airflow passage are formed in the bracket, the first and second airflow passages communicate with an airflow passage formed by the centrifugal impeller and the fan cover.

Abstract: A rotor is a consequent pole rotor. The rotor includes a first magnetic pole region functioning as a first magnetic pole, a second magnetic pole region functioning as a second magnetic pole that is a pseudo-magnetic pole, a shaft disposed in a shaft insertion hole, and a nonmagnetic member coupling the shaft to the rotor core. The nonmagnetic member includes a beam extending from the shaft to the second magnetic pole region.

Abstract: A motor has a rotor, a stator surrounding the rotor, a reinforcing member, and a mold resin part covering the stator and the reinforcing member. The tensile strength of the reinforcing member is higher than the tensile strength of the mold resin part.

Abstract: An outdoor unit includes a motor and a heat exchanger. The motor includes a rotor, a stator, and a heat dissipation member. The rotor is rotatable about an axis, and has a rotor core and a permanent magnet attached to the rotor core. The permanent magnet forms a magnet magnetic pole. A part of the rotor core forms a virtual magnetic pole. The stator surrounds the rotor from outside in a radial direction about the axis. The heat dissipation member is disposed on a side of the stator in a direction of the axis. The heat exchanger is disposed to face the heat dissipation member in the direction of the axis.

Abstract: A compressor includes: a stator core including a plurality of teeth around which an aluminum winding wire is wound in a concentrated manner; a rotor core disposed on an inner diameter side of the stator core and including a plurality of magnet insertion holes; and a plurality of ferrite magnets inserted in the magnet insertion holes, in which when a width of a winding wire portion formed in each of the teeth is represented as A, a length in an axis direction of the stator core is represented as L, and the number of slots is represented as S, the stator core has a shape that satisfies a relation of 0.3<S×A÷L<2.2.

Abstract: A motor includes a rotor and a stator. In a plane orthogonal to an axis direction of the rotor, the motor satisfies W2<W1<M1, and T1<W1<T1+2×T2, where M1 is a width of a surface of a permanent magnet, W1 is a maximum width of a portion of an inner wall of a first magnet insertion hole in contact with the surface, W2 is a minimum width from the first magnet insertion hole to a second magnet insertion hole, T1 is a width of a first front end surface of a first tooth, and T2 is a width from the first front end surface to a second front end surface of a second tooth.