The electrical motor includes a stator and a rotor configured to be rotated about an axis wherein the rotor includes at least three rotor subsegments, wherein a first and second rotor subsegment can be turned relative to one another about the axis in response to a rotation speed range being above a predetermined threshold value of a rotation speed of the electrical machine.

A rotor for an electrical machine includes a rotor body and an axis of revolution which extends in an axial direction and about which the rotor body is rotatable. The rotor further includes an outer casing surface which delimits the rotor body, at least one pole arrangement, and a movement mechanism for the at least one pole arrangement. The movement mechanism is designed such that the at least one pole arrangement is movable about a rotation axis which is oriented substantially parallel to the axis of revolution of the rotor. The at least one pole arrangement is also movable about the rotation axis in addition to rotation about the axis of revolution of the rotor.

An internal rotor for an electric machine includes a rotational axis, an outer circumferential face which delimits the internal rotor, a pole arrangement comprising a centroid, and an actuating mechanism for moving the pole arrangement towards the rotational axis or away from the rotational axis to set a first spacing between the outer circumferential face and the centroid. In an example embodiment, the actuating mechanism has an actuator for moving the pole arrangement. The actuator has a hydraulically operable piston, a pneumatically operable piston, an electric motor actuator, or converts an axial force to a radial force. In an example embodiment, the actuating mechanism is operatively connected to the pole arrangement. The actuating mechanism is arranged between the rotational axis and the pole arrangement, or the actuating mechanism is arranged between the outer circumferential face and the pole arrangement.

There are presented various embodiments disclosed in this application, including methods and systems of arranging permanent magnets to switch from a first configuration designed for a first torque output to a second configuration designed for a second torque output.

The present invention relates to a variable-flux motor comprising: a stator having stator coils; and a rotor disposed to be rotatable with respect to the stator with an air gap interposed therebetween, wherein the rotor comprises: a rotor core; a fixed magnet disposed along the radial direction of the rotor core, and of which one end portion is disposed adjacently to the air gap; and a variable magnet disposed inside the fixed magnet along the radial direction of the rotor core, and the variable magnet is formed such that a magnetic flux thereof varies when a preset current is applied to the stator coils. Therefore, use of an expensive permanent magnet can be excluded.

A rotating electric machine includes a field system having a magnet section, and an armature having a multi-phase armature coil. The magnet section has easy axes of magnetization oriented to be nearer perpendicular to a q-axis at locations closer to the q-axis than at locations closer to a d-axis, or to be perpendicular to the q-axis at locations on the q-axis. Each phase of the armature coil has electrical conductor sections formed by winding an electrical conductor wire multiply and arranged at positions facing the magnet section and at a predetermined interval in a circumferential direction. The electrical conductor wire includes a plurality of element wires in a radially laminated state and an insulating coat covering the laminated element wires. Each of the element wires has a flat cross section that is longer in the circumferential direction than in a radial direction.

A motor includes a stator and a rotor. The stator has a coil unit and an iron core. The coil unit includes a plurality of coils and an insulator. The iron core includes a plurality of teeth. The rotor has a permanent magnet. The rotor is provided on an inner side of the stator to be rotatable around a shaft as a center with a gap being provided between the stator and the rotor. The rotor includes a plurality of segments divided in a rotation axis direction, the plurality of segments being rotatable relatively to each other such that a magnetic flux output from the rotor changes.

A rotating electrical machine includes an armature including multi-phase armature winding, a first field generator disposed radially outside the armature winding and includes a magnet unit including several magnetic poles with polarities alternating circumferentially to the armature, and a second field generator radially inside the armature winding and equipped with a magnet unit including a plurality of magnetic poles with polarities alternating circumferentially to the armature. The armature or combination of the first and second field generators rotates along with a rotating shaft. The magnet unit of the first field generator include magnetic poles having magnetic polarity different from the corresponding poles of the second field generator radially from the armature. The armature winding includes a rectangular wire conductor whose transverse section has long sides and short sides extending perpendicular to the long sides. The rectangular wire winds in the circumferential direction with oriented long sides extending radially.

There are presented various embodiments disclosed in this application, including methods and systems of arranging permanent magnets to switch from a first configuration designed for a first torque output to a second configuration designed for a second torque output.

An electrical machine with two or more stators is proposed. One stator (1) is stationary and is fixed to the body (4) of the machine, and the second stator (6) is movable and can rotate freely to both the rotor (2) and the stationary stator (1). The movable stator (6) is self-orienting according to the lines of the magnetic field created by the electric windings and/or permanent magnets of the stationary stator (1). The movable stator (6) concentrates and shapes up the magnetic field B so that the magnetic lines are almost perpendicular to the rotor windings. The movable stator (6) does not rotate relative to the magnetic field of the stationary stator (1) and the magnetic field in it does not change, there is no continuous re-magnetization, magnetic hysteresis is avoided and no eddy currents are generated, due to which the losses and heating of the machine are reduced. The movable stator (6) may comprise permanent magnets to increase the magnetic field in the rotor active zones (2).