An unmanned aerial vehicle (UAV) includes a UAV body, and a stabilizing platform mounted on the UAV body and configured to stabilize a payload device. The stabilizing platform includes a frame assembly adapted to hold the payload device and a brushless motor coupled to the frame assembly. The brushless motor is configured to directly drive the frame assembly in response to one or more motor signals to allow the payload device to rotate around at least one of a pitch axis, a roll axis, or a yaw axis of the payload device. A brushless motor includes a rotor housing; a stator disposed within the rotor housing; and a linear Hall effect sensor. A posture of the payload device is controlled by adjusting a rotational angle of the brushless motor, and the rotational angle of the brushless motor is determined using the linear Hall effect sensor.

A motor includes a stator, a rotor, and a bearing holder. The rotor is disposed inside the stator. The rotor rotates with respect to the stator. The bearing holder holds a bearing of the rotor. The stator includes a plurality of coils, a plurality of teeth, and a coupling portion. Around the plurality of teeth, the plurality of coils are respectively arranged via an insulator. The coupling portion is located closer to the rotor than the plurality of coils are. The coupling portion couples at least some adjacent ones of the plurality of teeth. The bearing holder is positioned within a plane intersecting at right angles with a rotational axis of the rotor by coming into contact with either respective inner peripheral tips of the plurality of teeth or the coupling portion.

A motor includes a drive source assembly including a first wiring, a rotation detector including a second wiring, and a motor housing. The motor housing includes a first motor housing that accommodates at least a portion of the drive source assembly, and a second motor housing that accommodates at least a portion of the rotation detector. The first motor housing includes a first penetration portion that radially penetrates the circumferential wall portion of the first motor housing and is open to one axial side, and the second motor housing includes a second penetration portion that radially penetrates the circumferential wall portion of the second motor housing and is open to another axial side. The first wiring is lead out to the outside of the first motor housing via the first penetration portion, and the second wiring is lead out to the outside of the second motor housing via the second penetration portion.

A motor includes a drive source assembly including a first wiring, a rotation detector including a second wiring, and a motor housing. The motor housing includes a first motor housing that accommodates at least a portion of the drive source assembly, and a second motor housing that accommodates at least a portion of the rotation detector. The first motor housing includes a first penetration portion that radially penetrates the circumferential wall portion of the first motor housing and is open to one axial side, and the second motor housing includes a second penetration portion that radially penetrates the circumferential wall portion of the second motor housing and is open to another axial side. The first wiring is lead out to the outside of the first motor housing via the first penetration portion, and the second wiring is lead out to the outside of the second motor housing via the second penetration portion.

A power tool includes a brushless motor that has a stator including a tubular stator core, a rotor disposed in the tubular stator core, first and second electrically insulating members affixed to opposite ends of the stator core and a plurality of coils. A sensor-circuit board is supported by the first electrically insulating member. The first electrically insulating member is bounded by a first plane perpendicular to the rotational axis and a second plane perpendicular to the rotational axis, and the sensor-circuit board is located between the first plane and the second plane.

A power tool includes a brushless motor that has a stator including a tubular stator core, a rotor disposed in the tubular stator core, first and second electrically insulating members affixed to opposite ends of the stator core and a plurality of coils. A sensor-circuit board is supported by the first electrically insulating member. The first electrically insulating member is bounded by a first plane perpendicular to the rotational axis and a second plane perpendicular to the rotational axis, and the sensor-circuit board is located between the first plane and the second plane.

The present invention improves performance of a motor control device. A slave device (90) includes: an inverter (73) configured to drive a motor (74); and a control section (10) configured to control the motor (74) via the inverter (73). The control section (10) includes: a feedback signal obtaining section configured to obtain a feedback signal indicative of a predetermined physical quantity corresponding to an operating state of the motor (74); a communication section (120) configured to communicate with a PLC (100); and a PWM signal output section (130) configured to supply a motor driving signal to the inverter (73). The control section (10) is implemented by a single IC chip.

The present invention improves performance of a motor control device. A slave device (90) includes: an inverter (73) configured to drive a motor (74); and a control section (10) configured to control the motor (74) via the inverter (73). The control section (10) includes: a feedback signal obtaining section configured to obtain a feedback signal indicative of a predetermined physical quantity corresponding to an operating state of the motor (74); a communication section (120) configured to communicate with a PLC (100); and a PWM signal output section (130) configured to supply a motor driving signal to the inverter (73). The control section (10) is implemented by a single IC chip.

A multigroup, multiphase rotary electric machine control device including: a control target calculator to calculate an initial current command value of each phase based on a torque command value; a correction coefficient calculator to calculate a per-group correction coefficient corresponding to each group from a spatial mode M (M is 0 or a positive integer) of an electromagnetic force caused by magnetic flux density variation with respect to a rotational periodicity at the time of rotation of the multigroup, multiphase rotary electric machine; and a current command value corrector to calculate a current command value of the each phase, which is corrected based on the initial current command value and the per-group correction coefficient.

The present disclosure relates to an axial flux motor comprising a stator and a rotor. The stator comprises a first motor coil, a second motor coil, a first hall sensor, and a second hall sensor, and the rotor comprises a rotor platform member, an actuator magnet array arranged in an alternating axial polarity arrangement, a trigger magnet array, and a rotating magnetic return path member.