Abstract: A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.

Abstract: A motor includes: a rotor arranged in a rotatable manner centered on a central axis and having a shaft and a rotor core arranged around the shaft; a stator arranged to face the rotor in a radial direction; a detector in which at least a portion is located on one side of the rotor core in an axial direction; and a housing accommodating the rotor, the stator, and the detector. The detector has a tubular fixed portion fixed to the rotor and an extending portion extending from an upper side of the fixed portion in the axial direction toward an outer side of the fixed portion in the radial direction. The extending portion is located on one side of the rotor core in the axial direction. At least a portion of the extending portion and the rotor are in contact with each other in the axial direction.

Abstract: The disclosure provides a motor and a method for assembling the motor. The motor includes: a bus bar including a first portion of the bus bar and a second portion of the bus bar, the first portion of the bus bar and the second portion of the bus bar are defined separately; a first support component having a first support surface supporting the first abutting portion of the first portion of the bus bar toward the first direction; and a second support component having a second support surface supporting the second abutting portion of the second portion of the bus bar toward the first direction. The first portion of the bus bar further includes a first connecting portion, and the second portion of the bus bar further includes a second connecting portion. A distance between the first connecting portion and the second connecting portion is variable in the first direction.

Abstract: The example of the present application provides a motor and an electrical product. The motor includes a rotor that is arranged in a rotatable manner centered on a central axis, a stator arranged on an outer circumference of the rotor and facing the rotor in a radial direction, a bus bar holder arranged on one side of the rotor and the stator in an axial direction, and a housing that is cylindrical or substantially cylindrical. The rotor, the stator, and the bus bar holder are contained inside the housing. The bus bar holder has a protrusion on one side in the axial direction, and the protrusion is in contact with the bottom of the housing.

Abstract: A brushed motor includes a shaft, an armature around the shaft, a commutator on one side of the armature in an axial direction, a brush card on one side of the commutator in the axial direction, and a housing accommodating a portion of the shaft, the armature, the commutator, and a portion of the brush card. A convex portion positions corresponding to the commutator in the axial direction on a surface of the brush card on one side facing the commutator, which has a main body portion around the shaft and a pin bent from an end of the main body portion on the other side in the axial direction toward an outer side in a radial direction and one side in the axial direction. A distance between the pin and a brush on the brush card is larger than that between the main body portion and the convex portion.

Abstract: A motor is provided, including: a rotor that is arranged in a rotatable manner centered on a central axis and has a shaft and a rotor core arranged around the shaft; a stator arranged so as to face the rotor in a radial direction; and a detector located on an upper side of the rotor core in an axial direction. An upper surface of the rotor core in the axial direction has a first concave portion recessed downward in the axial direction, and a portion of the detector is inserted into the first concave portion. An electrical product including the motor is also provided.

Abstract: A spindle motor includes a base, a shaft arranged on the base and extending in a vertical direction, a stator having a coil defined by a wound conductive wire and arranged on an upper surface of the base, and a rotor rotatably supported around the shaft. The base has a through hole that penetrates the base from the upper surface to a lower surface. The conductive wire is drawn out to the lower surface side through the inside of the through hole. The through hole is sealed by a sealing material. The through hole includes a columnar lower column body and a columnar upper column body. The lower column body is arranged on the lower surface side of the base. A cross-sectional area of the upper column body orthogonal to an axial direction is smaller than a cross-sectional area of the lower column body orthogonal to the axial direction.

Abstract: The disclosure provides a hollow shaft and a method for manufacturing the same. The hollow shaft includes: an outer periphery component having a cylindrical shape, and the outer edge of the outer periphery component has a polygonal shape; an inner periphery component having a cylindrical shape and is fitted to the inner wall of the outer periphery component; and a bottom component including a bottom plate and a cylindrical body, the extending direction of the bottom plate is perpendicular to the axial direction, the cylindrical body extends from the radially outer circumference of the bottom plate along the axial direction toward the outer periphery component, and the inner wall of the cylindrical body fits the outer wall of the inner periphery component. The outer periphery component, the inner periphery component, and the bottom component are separately defined components. The hollow shaft of the disclosure includes three separate components defined separately.

Abstract: A vehicle guidance system includes vehicles, a positioning device to measure a location of each of the vehicles and output location information of the vehicles; a guidance device to generate, for each vehicle, a guidance command to guide the vehicle; and a storage device to store a guide command for each vehicle. The guidance device generates a guidance command including location information of points of passage defining a traveling path for each vehicle, stores the guidance command to the storage device, and, when at least some of the points of passage are to be altered, stores altered location information of points of passage to the storage device. Each vehicle accesses the storage device to acquire, from the storage device, the altered location information of points of passage.

Abstract: A motor includes a stationary unit and a rotation unit. The rotation unit includes a rotor hub, an annular body, and a clamp. The rotor hub is mounted with a first magnet opposite to the stator. The annular body is supported on an outer circumferential portion of the rotor hub. The clamp is directly or indirectly fixed to the rotor hub farther radially inside than the annular body, and presses the annular body to an axially lower side. The rotor hub includes a flange that expands radially outside from at least a portion excluding an upper end portion. On a surface of the clamp, a pattern to be detected to detect rotation of the rotation unit positioned in a circumferential direction with the central axis as the center is provided. The annular body is sandwiched between the flange and the clamp in an axial direction.

Abstract: A motor includes a stationary unit including a stator and a rotation unit including a magnet unit disposed radially outward of the stator and a cylindrical rotor holder. The magnet unit is held on a radially inside surface of the rotor holder. The magnet unit includes first magnets each of which has N and S poles magnetized in a radial direction, and second magnets each of which has N and S poles magnetized in a circumferential direction. Magnetic poles of radially inner end portions of the first magnets adjacent to each other in the circumferential direction via the second magnet are different from each other. Magnetic poles of circumferential end portions of the second magnets adjacent to each other in the circumferential direction via the first magnet are different from each other.

Abstract: A position estimation method of the present disclosure includes: acquiring learning data from a storage medium that stores the learning data including a sequence of a plurality of measurement values which define a waveform characteristic of a first electrical signal output from a sensor device when a rotor R is rotating; acquiring a sequence of a plurality of detection values which define a waveform characteristic of a second electrical signal output from the sensor device when the rotor starts rotating from a stopped state; and performing matching between an increase/decrease pattern of the sequence of the plurality of measurement values and an increase/decrease pattern of the sequence of the plurality of detection values to estimate a relationship between a rotation position of the rotor when the first electrical signal is output and a rotation position of the rotor when the second electrical signal is output.

Abstract: In a dust collector, an intake side surface on the intake portion side of a filter expands in a first direction, and extends in a direction including at least a component of a second direction. The housing of the dust collector includes a wall that defines an intake passage. The intake passage extends from the intake portion side to the filter side. One end of the intake passage is linked to the outside of the housing via the intake portion. Another end of the intake passage opposes a top surface side region of the intake side surface of the filter in a third direction perpendicular or substantially perpendicular to the first direction and the second direction. When viewed from the first direction, the top surface side region approaches the another end of the intake passage as it approaches the top surface side in the second direction.

Abstract: A motor includes a rotor including a shaft extending along a central axis, a stator including a coil and opposing the rotor in a radial direction with a gap, and a busbar positioned at one axial-directional side of the stator. The busbar includes a conducting wire-connecting portion connected to a conducting wire extending from the coil. A notch into which the conducting wire is inserted is provided in the conducting wire connecting portion. An inner circumferential surface of the notch includes a bottom surface opposing an opening side of the notch, a first opposed surface extending from the bottom surface towards the opening, and a second opposed surface extending from the bottom surface towards the opening and opposing the first opposed surface.

Abstract: In a method of obtaining an angle of each joint of a 6-axis vertical articulated robot when a position and a posture of an end effector attached on a sixth axis are given, a predetermined amount of offset exists between a sixth axis and a fourth axis, and the method includes sequentially determining a point of interest, which is a point on a circumference of a circle having the predetermined amount as a radius, around a first intersection point, on a plane which includes the first intersection point which is an intersection point of the sixth axis and the fifth axis and the plane which is orthogonal to the sixth axis, calculating a second intersection point, which is an intersection point of the fourth axis and the third axis, when it is assumed that the point of interest is an intersection point of the fifth axis and the fourth axis, calculating an inner product value of a first vector directed from the calculated second intersection point to the point of interest and a second vector directed from the point

Abstract: An offset of an output voltage of a magnetic sensor caused by an external magnetic field is removed. A motor according to a disclosed embodiment includes: a first magnetic sensor that detects a rotational position of a rotor; a second magnetic sensor that is arranged at a predetermined mechanical angle with respect to the first magnetic sensor and detects the rotational position of the rotor; a signal amplifier that amplifies a difference between a first signal which is a signal output from the first magnetic sensor and a second signal which is a signal output from the second magnetic sensor; and a pulse signal generator that converts an output signal of the signal amplifier into a pulse signal.

Abstract: A bus-bar unit includes bus-bars and a bus-bar holder supporting the bus-bars. The bus-bar includes a first and a second bus-bar piece, including a plate. The first bus-bar piece includes a coil wire connecting portion connected to a coil wire drawn from a stator, and a first junction terminal joined to the second bus-bar piece. The second bus-bar piece includes an external connection terminal connected to an external device, a second junction terminal joined to the first bus-bar piece, and a second piece main body connecting them. The second piece main body has a first extension extending from the external connection terminal along a direction perpendicular or substantially perpendicular to the axial direction, a second extension extending from the second junction terminal along a direction perpendicular or substantially perpendicular to the axial direction, and a crank portion located between them and bent in a crank shape in a plate thickness direction.

Abstract: A motor assembly includes a motor, a housing that houses the motor, an inverter that is electrically connected to the motor, an inverter case that houses the inverter and is provided integrally with the housing, a wire harness including a first connector electrically connected to a connector positioned on a side surface of the inverter case, a second connector electrically connected to a connector of the housing, and an electric wire electrically connecting the first connector and the second connector, and a side connector cover provided over the side surface of the inverter case, covering the first connector laterally.

Abstract: An offset of an output voltage of a magnetic sensor caused by an external magnetic field is removed. A motor according to a disclosed embodiment includes: a first magnetic sensor that detects a rotational position of a rotor; a second magnetic sensor arranged at a position shifted by ?/N in a rotation direction of the rotor with respect to the first magnetic sensor when the number of pole pairs is N; a signal amplifier that amplifies a difference between a first signal which is a signal output from the first magnetic sensor and a second signal which is a signal output from the second magnetic sensor; and a pulse signal generation unit that converts an output signal of the signal amplifier into a pulse signal.

Abstract: A power conversion device may include a first inverter to which one end of each phase winding of a motor is coupled, a second inverter to which the other end of each phase winding is coupled, and a switch circuit having at least one of a first switch element that switches between connection and disconnection of the first inverter to and from a ground, a first protection circuit being coupled in parallel to the first switch element, and a second switch element that switches between connection and disconnection of the second inverter to and from the ground, a second protection circuit being coupled in parallel to the second switch element.