Abstract: A fan and an electromechanical device are provided. The fan includes: an impeller, a motor, a motor support portion, a wire, and a wire lead-out portion. The wire lead-out portion includes: a base portion; a wire holding portion limiting movement of the wire in a first direction; and a wire locking portion, formed at an end of the wire holding portion and extending along the extension direction of the base portion, wherein the wire locking portion limits a movement of the wire in a second direction perpendicular to both the first direction and the extension direction of the base portion. The wire locking portion includes a blocking portion that does not extend beyond the wire holding portion in the extension direction of the base portion, and an extension portion extending from the blocking portion to an outer side of the wire holding portion along the extension direction of the base portion.

Abstract: A centrifugal fan includes an impeller including blades, a motor, a housing, and a resin section. The blades are arranged in the circumferential direction about a central axis extending in the vertical direction. The rotor of the motor is rotatable with the blades about the central axis. The housing includes a plate-shaped bottom plate that extends in the radial direction from the central axis, and a housing protrusion that protrudes upward from the upper surface of the bottom plate and extends in the circumferential direction. A housing recess, which is recessed downward, is located in the upper surface of the bottom plate. The resin section includes a resin filled portion filled in the housing recess, and a resin protrusion that is disposed below the blades, protrudes upward from the resin filled portion, and extends in the circumferential direction.

Abstract: A power module includes: a first switching device; a current-voltage conversion circuit into which current output from the first switching device flows; a measurement circuit that measures magnitude of the current; and an output terminal that outputs an output signal indicating the magnitude of the current measured by the measurement circuit. The measurement circuit measures the magnitude of the current output from the first switching device based on a resistance value of the current-voltage conversion circuit, and the first switching device and the measurement circuit are implemented in one semiconductor package.

Abstract: Embodiments of the disclosure provide an axial flux motor and an electrical product. The motor includes a rotor which rotates with a central axis as a center, and a stator which is disposed opposite to the rotor in an axial direction and has a plurality of stator units, the plurality of stator units being disposed around the central axis. The stator unit includes a core unit formed by a core piece, and a coil unit formed by a wire wound and disposed around the core unit. A height of the core unit in the axial direction is less than or equal to a height of the coil unit in the axial direction. With the embodiments of the disclosure, the dependency between the coil and the core in design and manufacture can be reduced, and the degree of design freedom can be improved.

Abstract: A control device includes angular velocity detecting circuitry, feedback circuitry, torque command calculation circuitry, a limiter, a drive controller, and correction circuitry. The angular velocity detecting circuitry detects an angular velocity of a motor. The feedback circuitry obtains a feedback value from the angular velocity. The torque command calculation circuitry obtains a torque command value according to a superordinate torque command value supplied from a superordinate device and the feedback value. The limiter limits the torque command value obtained by the torque command calculation circuitry so as not to exceed a preset torque upper limit value. The drive controller performs a drive control of the motor according to the limited torque command value. The correction circuitry corrects the superordinate torque command value or the torque command value according to the feedback value and the superordinate torque command value.

Abstract: An inline axial flow fan includes a first fan including a first impeller, a first motor portion, and a first case, and a second fan including a second impeller, a second motor portion, and a second case, the first fan and the second fan being positioned in sequence from one axial side to another axial side. The first case and the second case are accommodated in a housing, and only one of the first case and the second case includes multiple slits that connect the inside and the outside of the first case and the second case in the radial direction.

Abstract: A motor includes a shaft to rotate about a central axis extending in a vertical direction, a metal heat sink including a through-hole through which the shaft extends, a substrate disposed at an upper side of the heat sink through a gap, a sensor magnet fixed to an upper end of the shaft, a rotation sensor located at an upper side of the sensor magnet, and a heat dissipating material located in a gap between the substrate and the heat sink. The heat sink includes a heat sink main body portion and a wall portion located between the substrate and the heat sink main body portion and between the heat dissipating material and the through-hole when viewed from the vertical direction.

Abstract: Embodiments of this application provide a stator element, a stator assembly, a motor, and an electromechanical device, the stator element including at least two stacked stator housing sheets, each of the stator housing sheets being a frame enclosed by a sheet periphery, at least two protrusions being disposed around the periphery of each of the stator housing sheets, the protrusion being directed from an inside of the stator housing sheet to an outside of the stator housing sheet, a groove being formed between adjacent protrusions, and protrusions of the adjacent stator housing sheets being alternately arranged in a direction in which the at least two stator housing sheets are stacked. Therefore, heat of a stator disposed inside the stator element can be dissipated with a strong heat dissipation capability at relatively low costs.

Abstract: A circuit board includes a circuit board main body including a first through hole and a second through hole, a first inlay member inserted into the first through hole, and a second inlay member inserted into the second through hole. A first end surface of the first inlay member includes a first end portion on the side of the second inlay member, a second end portion on the opposite side of the second inlay member, a first area including the first end portion, and a second area including the second end portion. A first end surface of the second inlay member includes a third end portion on the side of the first inlay member, a fourth end portion on the opposite side of the first inlay member, a third area including the third end portion, and a fourth area including the fourth end portion. The circuit board further includes a first resist provided in the second area, and a second resist provided in the fourth area.

Abstract: A blower includes a moving blade, a motor, and a housing. The housing includes a holding portion located below the moving blade to hold the motor, and a peripheral wall portion having a cylindrical shape centered on the central axis and extending upward from a radially outer end portion of the holding portion. The peripheral wall portion includes a peripheral wall recess that is recessed downward from an upper end portion of the peripheral wall portion and connects a space radially inside of the peripheral wall portion and a space radially outside of the peripheral wall portion, and includes a first peripheral surface facing one circumferential direction that is opposite to a rotation direction of the moving blade. The first peripheral surface extends in one circumferential direction from the upper end of the peripheral wall recess toward the lower side.

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a rotor lid portion connected to the shaft, a rotor side wall portion extending downward from an outer edge of the rotor lid portion, a blower plate portion connected to a lower surface of the rotor lid portion and extending radially outward from a center portion of the rotor lid portion, an inlet disposed radially outward of the cylindrical portion and penetrating the bracket, and an outlet disposed radially outward of the blower plate portion and radially penetrating the rotor.

Abstract: A rotor includes a shaft, a rotor core, at least one magnet, and at least one fixing portion. The shaft extends in an axial direction. The rotor core includes laminations, and at least one caulking portion. The laminations are stacked in the axial direction. The at least one caulking portion is located at a radial-directional inner side of the at least one magnet to caulk the laminations to each other. The at least one magnet is embedded in the rotor core. The at least one fixing portion fixes at least portions of outer peripheral edges of the laminations to each other.

Abstract: One aspect of a motor of the present disclosure may include a rotor having a motor shaft disposed along a central axis extending in one direction, a stator facing the rotor via a gap in a radial direction, and a housing having an accommodating portion configured to accommodate the rotor and the stator, and to enable oil to be stored therein, wherein the housing comprises a lower wall portion facing a vertical-directional lower region in the inside of the accommodating portion, the lower wall portion comprises a cooling flow passage formed therein, and refrigerant flows in the cooling flow passage, and at least a portion of the cooling flow passage overlaps the vertical-directional lower region in the inside of the accommodating portion when viewed along a vertical direction.

Abstract: A motor includes a shaft, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a rotor connected to the shaft. The bracket includes a bracket bottom portion covering a lower side of the armature, and a terminal holding portion extending radially outward from an outer peripheral portion of the bracket bottom portion. The terminal holding portion includes a plate-shaped holding portion main body connected to the outer peripheral portion of the bracket bottom portion, a terminal disposed on an upper surface of the holding portion main body, and a protrusion portion projecting downward from a lower surface of the holding portion main body at a same position in a radial direction as that of the terminal, or radially outward of the terminal.

Abstract: An identification method includes supplying a motor power supply voltage from an identification device to a brushless DC motor via a power line, receiving the supply of the power supply voltage to rotate the brushless DC motor in accordance with a Pulse Width Modulation (PWM) signal output from a drive circuit of the brushless DC motor, superimposing an identification signal with a same frequency as that of the PWM signal on a power supply current flowing through the power line upon rotation of the brushless DC motor, acquiring the power supply current flowing through the power line, detecting the frequency of the identification signal superimposed on the power supply current, and identifying information about the brushless DC motor based on the detected frequency of the identification signal.

Abstract: A blower includes a first fan, a second fan axially below the first fan, and a tubular housing accommodating the first fan and the second fan. The housing includes an upper tubular portion accommodating the first fan, a lower tubular portion accommodating the second fan, a first fan support at an axially lower end portion of the upper tubular portion to support the first fan, and a second fan support at an axially upper end portion of the lower tubular portion to support the second fan. The housing is separable into a first structure including the first upper tubular divided body, the first lower tubular divided body, and the first fan support, and a second structure including the second upper tubular divided body, the second lower tubular divided body, and the second fan support.

Abstract: A circuit board includes a circuit board main body including a first through hole, and a first inlay member inserted into the first through hole. The first inlay member includes a first end surface, one surface of the circuit board main body includes a first through hole peripheral portion located around the first through hole, a first conductive pattern is located around the first through hole peripheral portion, the first through hole peripheral portion includes a first pattern exposed area where the first conductive pattern is exposed, and a first pattern non-exposed area where the first conductive pattern is covered with a resist, and the first end surface and the first pattern exposed area are a first mount pad to which a first terminal of an electronic component is connected.

Abstract: Accuracy of detecting abnormalities on the surface of a workpiece is improved. An appearance inspection apparatus for inspecting the appearance of a workpiece is provided. The appearance inspection apparatus for inspecting the appearance of the workpiece includes a first lighting unit that irradiates the workpiece with light, a first imaging unit that images the workpiece irradiated by the first lighting unit, a first detection unit that detects a first defect from an image captured by the first imaging unit, a second lighting unit that irradiates the workpiece with light, a second imaging unit that images the workpiece irradiated by the second lighting unit, and a second detection unit that detects a second defect from an image captured by the second imaging unit. The first lighting unit uses coaxial epi-illumination, and the second lighting unit uses coaxial epi-illumination and dome illumination.

Abstract: 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 rotation center 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 generation unit that converts an output signal of the signal amplifier into a pulse signal.

Abstract: A busbar apparatus includes a busbar to be connected to an external device, and a holder to hold the busbar and made of an insulating material. The busbar includes a terminal portion to be connected to the external device, an intermediate portion continuous with the terminal portion, and a connection portion continuous with the intermediate portion. The intermediate portion includes an edge portion including portions extending along a first axis. The terminal portion extends from the edge portion. The connection portion extends from the edge portion away from the terminal portion. The terminal portion has a thickness direction extending along a second axis not parallel to the first axis. The connection portion has a thickness direction not parallel to the second axis.