Abstract: A flying device includes a plurality of rotary vanes, a motor element serving as a driving source for each of the plurality of rotary vanes, the motor element driving and rotating a main shaft of the rotary vanes, and a drive circuit. The motor element includes a stator, a rotor, and a pair of bearings. The stator includes a stator core having an annular yoke and a plurality of teeth projecting inward from the annular yoke, and stator windings wound respectively around the plurality of teeth of the stator core. The rotor includes a permanent magnet of a cylindrical shape located inside the stator core via a gap, the permanent magnet being positioned counter to the plurality of teeth, a rotor yoke in contact with a cylindrical inner wall surface of the permanent magnet, and a shaft pivotally supported at an axis of the rotor yoke, the shaft being connected to the main shaft.

Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M<P<(4/3)M, and M?P, and wherein ratio (t1/Ds) of teeth tip width t1 to stator inside diameter Ds is given by a formula 0.18<(t1/Ds)<0.25.

Abstract: Temperature conditioning unit (100X) includes first intake and exhaust device (10A), second intake and exhaust device (20A), and housing (30) that accommodates element (50) to temperature-condition. First intake and exhaust device (10A) and second intake and exhaust device (20A) each include: a rotary drive device including a shaft and a rotary drive source that rotates the shaft; an impeller including an impeller disk that engages the shaft at its central part and includes a surface extending in a direction intersecting the shaft, and a plurality of rotor vanes erected on the impeller disk; and a fan case including a side wall surrounding the impeller, an intake port, and a vent communicating with an interior of housing (30). The plurality of rotor vanes each extend in a direction from the central part to an outer peripheral part of the impeller disk in the shape of a circular arc bulging in a rotation direction of the shaft.

Abstract: An electric motor element according to the present invention includes a rotor. The rotor includes a rotor core constituted by a plurality of punched steel sheets laminated in a rotational shaft direction, magnet positioning holes penetrating the rotor core, and a bonded magnet portion constituting a permanent magnet. The magnet positioning holes are filled with the bonded magnet portion. A length of the rotor core in the rotational shaft direction is larger than a length of a stator core in the rotational shaft direction. The bonded magnet portion is shaped such that a position of the bonded magnet portion, the position being located between both axial ends of the rotor and in a plane facing the stator core, is closer to a rotation shaft holding the rotor, than to a position of the bonded magnet portion, the position being located at one of the axial ends of the rotor in the rotational shaft direction and in the plane facing the stator core.

Abstract: A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.

Abstract: Electric motor (100) according to the present invention includes stator (40), rotor (10), and a pair of bearings (30). Stator (40) has stator core (41) which is annularly formed. Rotor (10) is located on the inner circumferential side of stator core (41), and includes shaft (12), rotor core (11), and bonded magnets (14). Bonded magnets (14) are filled in magnet holes (13). Bonded magnets (14) are formed with high density portion (14b) having a high density and low density portion (14c) having a density lower than high density portion (14b). In electric motor (100), center position (11b) of rotor core (11) is located on the side where high density portion (14b) is present with respect to center position (41b) of stator core (41) in the direction of shaft center (12a) of shaft (12).

Abstract: Motor according to the present invention includes rotor core and rotor. Rotor core includes outer circumferential surface formed along shaft center, and a plurality of magnet holes. Each of magnet holes has a convex surface located on a side of rotary shaft and a concave surface located on a side of outer circumferential surface. ?1 is a distance between the convex surface and the concave surface on an end part located on the side of outer circumferential surface. ?1 is a distance between the convex surface and the concave surface on a central part located on the side of rotary shaft. In magnet hole, ?1 is larger than ?1. Bonded magnets are filled in magnet holes. ?2 is a thickness of a magnet component located on the end part in an oriented direction of the magnet component. ?2 is a thickness of a magnet component located on the central part in an oriented direction of the magnet component. In each of the plurality of bonded magnets, ?2 is larger than ?2.

Abstract: Provided is a stator of a motor which is capable of reducing an iron loss generated in a motor and thereby attaining a high-efficient motor. A stator of a motor comprises a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a narrower portion having a smaller width than a remaining portion of the extending portion.

Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M<P<(4/3)M, and M#P, and wherein ratio (t1/Ds) of teeth tip width t1 to stator inside diameter Ds is given by a formula 0.18<(t1/Ds)<0.25.

Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M<P<(4/3)M, and M?P, and wherein ratio (t1/Ds) of teeth tip width t1 to stator inside diameter Ds is given by a formula 0.18<(t1/Ds)<0.25.

Abstract: A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.

Abstract: A motor stator of the invention is provided with a laminated stator core comprising a plurality of core pieces having teeth and linked by intermediate thin-wall portions. The thin-wall portions are bent to form the stator core into an annular shape with two ends of the stator core joined by welding, and slots are formed between adjoining pairs of the teeth. A welded portion of the stator core is not near a center line in a radial direction of any of the slots.

Abstract: Provided is a stator of a motor which is capable of reducing a loss generated in a motor and thereby attaining a high-efficient motor, and a motor including the stator. A stator of a motor comprises a stator core including a plurality of plate members stacked together; the stator core including: a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a constant-width portion extending radially in a straight-line shape so as to have a constant circumferential width, a narrower portion having a smaller circumferential width than the constant-width portion, and a clamp portion for securing the plurality of plate members to each other; and wherein the clamp portion is provided in the constant-width portion.

Abstract: Provided are a rotor of a motor capable of attaining a high-speed rotation by appropriately dispersing a stress exerted on a flux barrier portion while reducing a leakage of magnetic flux, and a fan driving motor including the rotor. A second inner wall surface is greater than a first inner wall surface in length in a cross-section perpendicular to a rotational axis (C). A side wall surface has a flux barrier wall surface extending from each of both ends of the second inner wall surface in the cross-section perpendicular to the rotational axis (C), the flux barrier wall surface extending outward relative to the second inner wall surface in an extending direction of the second inner wall surface and more distant from an outer edge of a rotor as it goes from the second inner wall surface toward the first inner wall surface in the cross-section perpendicular to the rotational axis (C).

Abstract: A stator of a motor comprises a stator core including a plurality of plate members stacked together; the stator core including: a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a constant-width portion extending radially in a straight-line shape so as to have a constant circumferential width, a narrower portion having a circumferential width smaller than a circumferential width of the constant-width portion, and a clamp portion for securing the plurality of plate members to each other; and wherein at least a portion of the clamp portion is located in the narrower portion.

Abstract: Provided are a rotor of a motor capable of attaining a high-speed rotation by appropriately dispersing a stress exerted on a flux barrier portion while reducing a leakage of magnetic flux, and a fan driving motor including the rotor. A second inner wall surface is greater than a first inner wall surface in length in a cross-section perpendicular to a rotational axis (C). A side wall surface has a flux barrier wall surface extending from each of both ends of the second inner wall surface in the cross-section perpendicular to the rotational axis (C), the flux barrier wall surface extending outward relative to the second inner wall surface in an extending direction of the second inner wall surface and more distant from an outer edge of a rotor as it goes from the second inner wall surface toward the first inner wall surface in the cross-section perpendicular to the rotational axis (C).

Abstract: A brushless motor capable of high speed rotation by field weakening operation is designed to reduce torque ripple at a maximum load point with current phase advance so that the torque ripple at the maximum load point is 1 to 1.5 times the torque ripple at a low speed load point.

Abstract: Having a stator core including a yoke, a plurality of inside teeth, and a plurality of outside teeth, an inside rotor, and an output rotor, the inside slot open angle/inside pole angle and the outside slot open angle/outside pole angle are determined so that the inside cogging torque due to rotation of the inside rotor and the outside cogging torque due to rotation of the outside rotor may cancel each other in inverted phases. Plural combinations are provided so that the amplitude of inside cogging torque and the amplitude of outside cogging torque due to rotation of outside rotor maybe approximate values in inverted phase, and the combination of the highest combined voltage value of the both induced voltage is selected.

Abstract: A motor comprising a stator having a plurality of magnetic poles disposed in a circumferential direction along an outer periphery thereof, a rotor disposed rotatably around the outer periphery of the stator, and a magnet disposed in a circumferential direction along an inner periphery of the rotor. The stator is formed by laminating sheet-like plates. A plurality of the sheet-like plates including an outermost layer of this laminated body comprises a flat portion substantially perpendicular to the magnet, and an extended portion bent to a direction substantially parallel to the magnet. A part of the sheet-like plate having the extended portion disposed to the outermost side is formed into a thickness smaller than thicknesses of the other parts.

Abstract: A fan motor includes a pair of fans axially mounted to both sides of a rotary shaft of the motor. The motor includes an inner rotor placed inside a stator wound with windings and an outer rotor placed outside the stator. The motor thus has a dual-rotor structure where the inner rotor and the outer rotor are held such that both the rotors can rotate on the rotary shaft.