The rotation of the synchronous reluctance motor is controlled through energization of the winding with current of a phase having a ratio k between the total sum of radial-direction widths of the slits on the q-axis and a magnetic gap length, and having a lead angle β from the d-axis. Among the core layers, the radial-direction width, on the q-axis, of the core layer that lies at a position closest in the circumferential direction to a point P at which there intersect the outer periphery of the rotor and the straight line passing through the rotor center and drawn at an angle ψ=arctan(tan β/(1+0.2k)) from the d-axis, is larger than the radial-direction width of other core layers on the q-axis.

A reluctance motor is used in a compressor. The reluctance motor includes a rotor having a rotor core that has an annular outer circumference about an axis, having a plurality of magnetic poles along the outer circumference, and having no permanent magnet, and a stator including a stator core that surrounds the rotor from an outer side in a radial direction about the axis and a winding wound around the stator core in wave winding. Each of the plurality of magnetic poles has a first slit formed in the rotor core and a second slit formed on an inner side of the first slit in the radial direction. The stator core has a refrigerant passage through which refrigerant passes in a direction of the axis.

A short pitched switched reluctance motor control apparatus comprising a voltage provider comprising a first coupling and a second coupling configured to be coupled to a phase winding of the switched reluctance motor for applying a voltage to drive current in the winding between the first and second coupling is disclosed. The apparatus further comprises a controller configured to apply a first voltage pulse to the first coupling, and to apply a second voltage pulse to the second coupling, wherein the start of the second pulse is delayed with respect to the start of the first pulse, and the end of the first pulse is delayed with respect to the end of the second pulse.

In a rotor structure including a leak prevention hole formed in a rotor core to prevent leakage of magnetic flux from a permanent magnet; an outer-circumferential-side dovetail groove formed in an outer-circumferential-side inner wall of the leak prevention hole, an inner-circumferential-side dovetail groove formed, opposite the outer-circumferential-side dovetail groove, in an inner-circumferential-side inner wall of the leak prevention hole; and a non-magnetic bridge having both end portions engageable with the dovetail grooves. The non-magnetic bridge is formed with a chamfer at only one end face of both end faces in an axial direction of the rotor core. The non-magnetic bridge includes two or more non-magnetic bridges. The non-magnetic bridges are arranged so that the end faces formed with the chamfers are alternately located at the one end face of the rotor core.

A rotor for an electrical machine includes a laminated core with stack of sheets extending in an axial direction from a first axial end to a second axial end. The stack of sheets has layered layers in the axial direction. Each layer has a plurality of sheet areas with flow conduction blocks situated between adjacent sheet areas. At least one flow conduction block is cast with a non-ferromagnetic potting compound. The potting compound extends in the at least one flow conduction block from the first axial end to the second axial end. Fastened sheet areas, respectively, having at least one web protrudes into the potting compound. The protruding web, at least in part, extends in a direction, having a component in the axial direction. In each layer, at least one sheet area is a fastened sheet area.

A rotor for a motor is provided. The rotor has a rotor core, first permanent magnets mounted in first grooves of the rotor core, and second permanent magnets mounted in second grooves of the rotor core. The rotor core is provided with groove groups distributed in a peripheral direction of the rotor core. Each groove group has an air groove, a first groove and a second groove. The ends of the air groove, the first groove and the second groove, which are close to a center point of the rotor core, are close to one another. The end of the air groove, the first groove and the second groove, which are away from the center point of the rotor core, are away from one another. Multiple magnetic isolation structures are provided in the rotor core.

According to some embodiments, a synchronous reluctance machine is disclosed. The machine includes a stator; a rotor disposed within the stator and configured to rotate relative to the stator; and a sleeve disposed circumferentially around the rotor.

A rotor for a reluctance motor includes a laminated core having a number of rotor sheet metal blanks. Each rotor sheet metal blank includes flux barriers cast with a non-ferromagnetic casting compound and at least one soft-magnetic rotor sheet which delimits the flux barriers. Flux barriers of adjacent rotor sheet metal blanks are arranged offset relative to one another so that the flux barriers of one of the adjacent rotor sheet metal blanks are delimited in an axial direction at least partially by the rotor sheets of the other one of the adjacent rotor sheet metal blanks, with the casting compound of the flux barriers adhering in an adhesion zone to the rotor sheets.

A permanent magnet synchronous rotating electrical machine (100) has: a rotor shaft (11) extending axially; a rotor core (12) in which flux barriers that spread toward the rotation axis center and in a circumferential direction in such a way as to form a convex curved surface and extend axially in each circumferential angle region, and the flat plate-shaped space that is located at a circumferential-direction center of the flux barriers and is thinner than radial width of the flux barriers, and includes laminated plates; a flat plate-like permanent magnet (51) provided in such a way as to occupy the flat plate-shaped space; a stator core (21) in which stator teeth (22) are formed and disposed on an outer surface of the rotor core (12) via a clearance, and protrude toward radially inner side; and multi-phase armature windings (24) of multiple poles wound around the stator teeth (22).

The invention provides a switched reluctance motor having high torque and reduced counter electromotive force for generating mechanical energy. The motor includes a rotor component having a plurality of rotor poles speed equally circumferentially around the center of the rotor component, a stator component positioned around the rotor component and having a plurality of bifurcated stator poles and coil windings to in the separation between the legs of each stator pole, and a magnet mounted between adjacent stator poles, a shunt in electromagnetic communication with the coil windings the stator poles, and a bridge component encircled by the coil windings and separating each stator pole from each shunt.