A lamination ring for constructing a laminated rotor core for a rotor of an electric machine and a method for producing a laminated rotor core made of multiple lamination rings for a rotor is disclosed. The lamination ring has multiple receiving openings for permanent magnets, and multiple structural elements are arranged homogeneously in the lamination ring at the same distance to one another in the circumferential direction in a rotated manner by an offset angle relative to the axis of symmetry such that the arrangement of structural elements is not symmetrical relative to the axis of symmetry of the lamination ring.

A rotor includes a rotor core fixed to a shaft, a pair of magnet slots arranged in a V-shape in the rotor core so as to be separated away from each other toward a radially outer side, permanent magnets inserted into the magnet slots, and a hole provided on the radially outer side of the magnet slots. The distance between each permanent magnet and the hole increases toward the radially outer side. The distance between an outer circumference of the rotor core and the hole is not less than the distance between each magnet slot and the outer circumference of the rotor core.

A rotor includes a rotor core fixed to a shaft, a pair of magnet slots arranged in a V-shape in the rotor core so as to be separated away from each other toward a radially outer side, permanent magnets inserted into the magnet slots, and a hole provided on the radially outer side of the magnet slots. The distance between each permanent magnet and the hole increases toward the radially outer side. The distance between an outer circumference of the rotor core and the hole is not less than the distance between each magnet slot and the outer circumference of the rotor core.

A permanent magnet carrier, which could be a rotor or stator of an electric machine, includes a first non-magnetic ring and a second non-magnetic ring. Between the rings are soft magnetic pole elements. The soft magnetic pole elements each connect to the first and second non-magnetic rings and the soft magnetic pole elements are separated from each other by the first and second non-magnetic rings. Permanent magnets are disposed between the soft magnetic pole elements.

A permanent magnet carrier, which could be a rotor or stator of an electric machine, includes a first non-magnetic ring and a second non-magnetic ring. Between the rings are soft magnetic pole elements. The soft magnetic pole elements each connect to the first and second non-magnetic rings and the soft magnetic pole elements are separated from each other by the first and second non-magnetic rings. Permanent magnets are disposed between the soft magnetic pole elements.

In an embodiment, disclosed is a motor comprising: a stator; a rotor disposed to correspond to the stator; and a shaft coupled to the rotor, wherein the rotor comprises: a rotor core including a yoke and a plurality of rotor teeth arranged on the yoke so as to spaced apart in the circumferential direction; a plurality of magnets arranged between the rotor teeth; and a can disposed on the rotor core on which the plurality of magnets are arranged, the can includes a first can having a hole and a second can having a protruding part coupled to the hole, and the protruding part is disposed to face the outer surface of the magnet. Therefore, the motor uses the protruding part of the can so as to inhibit the separation of the magnets, inhibit the leakage of flux, and be implemented to be more compact than a conventional spoke-type motor. In addition, the motor can inhibit the leakage of magnetic flux that flows toward the shaft.

In an embodiment, disclosed is a motor comprising: a stator; a rotor disposed to correspond to the stator; and a shaft coupled to the rotor, wherein the rotor comprises: a rotor core including a yoke and a plurality of rotor teeth arranged on the yoke so as to spaced apart in the circumferential direction; a plurality of magnets arranged between the rotor teeth; and a can disposed on the rotor core on which the plurality of magnets are arranged, the can includes a first can having a hole and a second can having a protruding part coupled to the hole, and the protruding part is disposed to face the outer surface of the magnet. Therefore, the motor uses the protruding part of the can so as to inhibit the separation of the magnets, inhibit the leakage of flux, and be implemented to be more compact than a conventional spoke-type motor. In addition, the motor can inhibit the leakage of magnetic flux that flows toward the shaft.

Torque is improved in a composite torque rotating electric machine that uses permanent magnets having a low residual magnetic flux density such as ferrite magnets, and includes: a stator comprising armature windings arranged at a fixed interval at multiple positions on the inner periphery; a rotor which has a permanent magnet in a cylindrical core comprising laminated magnetic steel sheets and is arranged inside of the stator; and magnetic flux blocking units provided across the circumferential direction on the outer periphery of the rotor that block the closed loop magnetic flux generated around the stator windings. The magnetic flux blocking units can be multiple permanent magnets, with a non-magnetic body such as an air gap disposed between them. The distance between the permanent magnets and the non-magnetic part can be smaller than the interval at which the armature windings are arranged.

A permanent-magnet three-phase duplex motor is provided with two systems, namely a system that includes a first three-phase winding and a first inverter circuit, and a system that includes a second three-phase winding and a second inverter circuit, and a controlling apparatus is configured such that when one system fails, the controlling apparatus stops operation of the inverter circuit of the failed system, and controls operation of the inverter circuit of the normal system to increase the driving current that is supplied from the inverter circuit of the normal system, and the first three-phase winding and the second three-phase winding are configured such that magnetic fields that act on the permanent magnets in a demagnetizing direction when the increased driving current is supplied from the inverter circuit of the normal system are equal to magnetic fields that normally act on the permanent magnets in the demagnetizing direction.

To provide a rotor member, rotor, and electric motor equipped with the same, which suppress the stress or stretching concentrated on a part of a cylindrical member, thereby enabling to raise the maximum revolution speed, and enabling greater torque to be obtained. In a rotor member fixed by press-fitting to a rotary shaft part of a rotating electrical machine, a thrust member that thrusts a cylindrical member to an outer side in the radial direction against a sleeve part is present between a plurality of magnet segments which are adjacent in the circumferential direction.