The invention provides a power tool, a motor and a rotor assembly of the motor. The rotor assembly includes a rotating shaft, and a rotor body, a limiting member and a cooling fan fixed on the rotating shaft, the limiting member and the cooling fan are respectively arranged at both axial ends of the rotor body, the rotor body includes a rotor core and magnets fixed in the rotor core, the limiting member and the cooling fan jointly limit an axial displacement and a radial displacement of the magnets.

The invention provides a power tool, a motor and a rotor assembly of the motor. The rotor assembly includes a rotating shaft, and a rotor body, a limiting member and a cooling fan fixed on the rotating shaft, the limiting member and the cooling fan are respectively arranged at both axial ends of the rotor body, the rotor body includes a rotor core and magnets fixed in the rotor core, the limiting member and the cooling fan jointly limit an axial displacement and a radial displacement of the magnets.

A rotor is a consequent pole rotor. The rotor includes a first magnetic pole region functioning as a first magnetic pole, a second magnetic pole region functioning as a second magnetic pole that is a pseudo-magnetic pole, a shaft disposed in a shaft insertion hole, and a nonmagnetic member coupling the shaft to the rotor core. The nonmagnetic member includes a beam extending from the shaft to the second magnetic pole region.

A radial-gap-type rotary electric machine, a production method therefore, a production device for a rotary electric machine teeth piece, and a production method therefore can achieve a high efficiency and have excellent productivity. A radial-gap-type rotary electric machine includes a rotation shaft, a rotator including an inner-peripheral-side rotator iron core rotatable around the rotation shaft and an outer-peripheral-side rotator iron core arranged on an outer peripheral side of the inner-peripheral-side rotator iron core and rotatable around the rotation shaft, and a stator disposed between the inner-peripheral-side rotator iron core and the outer-peripheral-side rotator iron core. A permanent magnet is provided on at least one of an outer-peripheral-side surface of the inner-peripheral-side rotator iron core and an inner-peripheral-side surface of the outer-peripheral-side rotator iron core. The stator includes a stator iron core including teeth formed of laminated bodies where amorphous metal foil strip pieces are held with mutual friction.

A radial-gap-type rotary electric machine, a production method therefore, a production device for a rotary electric machine teeth piece, and a production method therefore can achieve a high efficiency and have excellent productivity. A radial-gap-type rotary electric machine includes a rotation shaft, a rotator including an inner-peripheral-side rotator iron core rotatable around the rotation shaft and an outer-peripheral-side rotator iron core arranged on an outer peripheral side of the inner-peripheral-side rotator iron core and rotatable around the rotation shaft, and a stator disposed between the inner-peripheral-side rotator iron core and the outer-peripheral-side rotator iron core. A permanent magnet is provided on at least one of an outer-peripheral-side surface of the inner-peripheral-side rotator iron core and an inner-peripheral-side surface of the outer-peripheral-side rotator iron core. The stator includes a stator iron core including teeth formed of laminated bodies where amorphous metal foil strip pieces are held with mutual friction.

A rotor assembly system for a manufacturing cell includes a central robotic system comprising a multi-axial central robot and a conveyor platform and one or more multi-axial auxiliary robotic systems secured at one or more locations within the cell. The conveyor platform is operable to move the central robot within the cell. The central robotic system and the one or more auxiliary robotic systems are configured to perform a plurality of rotor manufacturing processes on at least one rotor component in coordination with one another, and the central robotic system is configured to transfer the at least one rotor component between one or more rotor manufacturing processes of the plurality of rotor manufacturing processes.

A rotor assembly system for a manufacturing cell includes a central robotic system comprising a multi-axial central robot and a conveyor platform and one or more multi-axial auxiliary robotic systems secured at one or more locations within the cell. The conveyor platform is operable to move the central robot within the cell. The central robotic system and the one or more auxiliary robotic systems are configured to perform a plurality of rotor manufacturing processes on at least one rotor component in coordination with one another, and the central robotic system is configured to transfer the at least one rotor component between one or more rotor manufacturing processes of the plurality of rotor manufacturing processes.

A method for controlling a synchronous double stator electric machine. A first stator and a first set of magnetic poles on a common rotor forms a first electric machine. A second stator and a second set of magnetic poles on the rotor forms a second electric machine. The first electric machine and the second electric machine is shifted mechanically by a predetermined angle. An electrical shift is produced to the control of at least the mechanically shifted electric machine with a respective frequency converter in order to at least partly compensate for the mechanical shift in the mechanically shifted electric machine.

A method for controlling a synchronous double stator electric machine. A first stator and a first set of magnetic poles on a common rotor forms a first electric machine. A second stator and a second set of magnetic poles on the rotor forms a second electric machine. The first electric machine and the second electric machine is shifted mechanically by a predetermined angle. An electrical shift is produced to the control of at least the mechanically shifted electric machine with a respective frequency converter in order to at least partly compensate for the mechanical shift in the mechanically shifted electric machine.

The present disclosure provides a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric vehicle. A rotor structure includes a rotor body. The rotor body has magnetic steel slot groups. Each of the magnetic steel slot groups includes an outer layer magnetic steel slot including: a first outer layer magnetic steel slot segment, a second outer layer magnetic steel slot segment, a first bent slot, and a second bent slot. The first outer layer magnetic steel slot segment and the second outer layer magnetic steel slot segment are arranged along a radial direction of the rotor body and are opposite to each other. Extended lines of a length directional geometric centerline of the first outer layer magnetic steel slot segment and a length directional geometric centerline of the second outer layer magnetic steel slot segment define a first angle.