A motor according to the present disclosure includes a rotor. The rotor includes a plurality of first magnets arranged in a Halbach arrangement in a circumferential direction of the rotor, and a second magnet. The plurality of first magnets and the second magnets are arranged alternately and adjacent to each other. The second magnet is longer in the circumferential direction of the rotor as compared to the first magnet. The first magnet and the second magnet have a substantially trapezoidal shape when viewed from the rotation axis direction of the rotor.

A motor according to the present disclosure includes a rotor. The rotor includes a plurality of first magnets arranged in a Halbach arrangement in a circumferential direction of the rotor, and a second magnet. The plurality of first magnets and the second magnets are arranged alternately and adjacent to each other. The second magnet is longer in the circumferential direction of the rotor as compared to the first magnet. The first magnet and the second magnet have a substantially trapezoidal shape when viewed from the rotation axis direction of the rotor.

The invention relates to a non-cogging electric generator having at least one stator and at least one dual rotor, wherein the dual rotor comprises a plurality of primary magnet devices arranged in circular Halbach array. Non-cogging is achieved by having inner and outer rotor rotating synchronously. Concentration of magnetic flux is achieved by magnetic devices tapering into pyramidal shape, such that magnetic devices arranged on the inner rotor are facing magnetic devices on the outer rotor, whereas said magnetic devices are facing each other with the opposite polarity. Stator comprises electrical wire windings and is positioned between inner and outer rotor.

The invention relates to a non-cogging electric generator having at least one stator and at least one dual rotor, wherein the dual rotor comprises a plurality of primary magnet devices arranged in circular Halbach array. Non-cogging is achieved by having inner and outer rotor rotating synchronously. Concentration of magnetic flux is achieved by magnetic devices tapering into pyramidal shape, such that magnetic devices arranged on the inner rotor are facing magnetic devices on the outer rotor, whereas said magnetic devices are facing each other with the opposite polarity. Stator comprises electrical wire windings and is positioned between inner and outer rotor.

An exemplary axial cladding magnet magnetically-geared machine is disclosed comprising Halbach array cladding magnets located on the axial ends of the magnetically-geared machine. The Halbach array cladding magnets can be used to increase the magnetic efficiency and torque transmission of the magnetically-geared machine by mitigating end-effect losses.

An exemplary axial cladding magnet magnetically-geared machine is disclosed comprising Halbach array cladding magnets located on the axial ends of the magnetically-geared machine. The Halbach array cladding magnets can be used to increase the magnetic efficiency and torque transmission of the magnetically-geared machine by mitigating end-effect losses.

A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.

A spindle shaft device including a shaft, a first torque sensor, and a second torque sensor. The shaft extends along an axial direction and comprises a first side portion, a second side portion, and a central portion located between the first side portion and the second side portion. The central portion has a central torsional rigidity with respect to the axial direction. The first side portion has a first torsional rigidity with respect to the axial direction. The second side portion has a second torsional rigidity with respect to the axial direction. The first torsional rigidity is smaller than the central torsional rigidity. The second torsional rigidity is smaller than the central torsional rigidity. The first torque sensor is disposed on the first side portion. The second torque sensor is disposed on the second side portion.

A rotating electrical machine armature winding includes conductor portions arranged circumferentially away from each other and face a magnet unit. The conductor portions have no inter-conductor members circumferentially disposed therebetween. Each conductor portion includes wire segments of the conductor wire member arranged in circumferentially and radially arranged rows. The conductor portions include a first conductor portion and a second conductor portion which are arranged adjacent to each other in the circumferential direction as a pair and belong to the same phase. The first conductor portion includes the wire segments of the conductor wire member which are arranged asymmetrically with those of the second conductor portion in the circumferential direction. The magnet unit includes magnet which have major magnetic pole faces. Each of the major magnetic pole faces is shaped to have a major magnetic pole angle is selected to be less than or equal to an inter-conductor angle.

A rotating electrical machine equipped with a magnetic field-producing unit which includes a magnet unit having magnets each of which has easy axes of magnetization oriented to extend linearly parallel to each other and defines a plurality of magnetic paths along the easy axes of magnetization. The magnets are discrete from each other through a d-axis defined on the center of the magnetic pole and a q-axis defined on a magnetic boundary between the magnetic poles. The magnets are configured to have a back electromotive force constant which is higher than that of parallel-oriented magnets when an angle of rotation of the rotor lies in a first angle range including the gravity center of the magnets. The parallel-oriented magnets are designed to have magnetic paths which are different from those of the magnets of the magnet unit and oriented along easy axes of magnetization extending linearly parallel to the d-axis.