Abstract: An outer rotor direct drive motor with a position encoder includes an outer rotor and a stator disposed in the outer rotor, wherein the stator includes: a stator chassis; a stator printed circuit board disposed on an side of the stator chassis, at least an excitation coil and a receiving coil being printed at the stator printed circuit board; and a stator winding disposed on the stator printed circuit board; wherein the outer rotor changes a coupling strength between the excitation coil and the receiving coil. The present invention has the following advantages: the installation method is flexible, and supports through-shaft installation without occupying too much space of the motor body; the sensor structure is stable, the rotor scale area and the induction coil are all printed on the printed circuit board, even in the case where the rotational speed is too fast, deformation or cracking will not be occurred.

Abstract: A multi-degree-of-freedom electromagnetic machine includes a spherical structure, a first coil, a second coil, a non-magnetic structure, and a Halbach array. The spherical structure has a first axis of symmetry, a second axis of symmetry, and a third axis of symmetry, and the first, second, and third axes of symmetry are disposed perpendicular to each other. The first coil is wound on the spherical structure about the first axis of symmetry, and the second coil is wound on the spherical structure about the second axis of symmetry. The non-magnetic structure is spaced apart from, and at least partially surrounds, the spherical structure. The Halbach array is mounted on the non-magnetic structure and includes N-magnets, where N is a multiple of 4. The spherical structure and non-magnetic structure are mounted to allow relative rotation between the non-magnetic structure and the spherical structure.

Abstract: A rotor includes a rotor core having an outer circumference extending in a circumferential direction about an axis, and having a magnet insertion hole along the outer circumference, and a permanent magnet disposed in the magnet insertion hole. The rotor core has a plurality of slits formed on an outer side of the magnet insertion hole in a radial direction about the axis, and a bridge extending to connect an inner side and an outer side of the magnet insertion hole in the radial direction. The plurality of slits have a first slit closest to an end of the magnet insertion hole in the circumferential direction, and a second slit closest to the bridge. When T1 represents a shortest distance from the magnet insertion hole to the first slit and R1 represents a shortest distance from the reference point to the second slit, R1>T1 is satisfied.

Abstract: A rotary electric machine includes a stator, a rotor, a case having two or more seat portions on which portions of a stator core are seated, and a reinforcement plate disposed on the top surface of the stator core. The stator core includes two or more attachment portions that are seated and fixed on the seat portions. The reinforcement plate is less likely to flex in the axial direction than the steel sheets, and is fixed on the top surface of the stator core so as to extend over at least two of the attachment portions.

Abstract: A brushless motor capable of accurately detecting magnetism and securing rigidity of a center piece is provided. A brushless motor (10) includes; a stator (12); a rotor (14) having a rotor magnet (22) arranged radially outward of the stator (12); a metal center piece (18) that has a plate-like portion (38) disposed opposing the stator (12) at one side in an axial direction of the stator (12), and holds the stator (12); a control board (42) disposed at an opposite side from the stator (12) with respect to the plate-like portion (38), and provided with a magnetic detection sensor (46); a magnetic induction member (68) extending from a side of the rotor magnet (22) to a side of the magnetic detection sensor (46); and a resin-made connector member (44) that holds a connector terminal (62) connected to the control board (42), holds the magnetic induction member (68), and is fixed to the center piece (18).