The present invention provides a rotor core, which comprises a plurality of grooves formed at the same interval along the circumferential direction, wherein the number of the grooves is an integer multiple of the least common multiple of commonly used pole number.

Provided is a high-powered low profile motor. The motor includes a stator (20) facing a rotor (50) while having a gap from the rotor (50). The stator (20) includes a ring-shaped connection core (10) formed by connecting a plurality of divided cores (5a) and an insulator (24) formed as if surrounding the connection core (10) by resin molding by an insertion forming. An inner diameter (r) of the connection core (10) is set smaller than inner diameters (R) of the divided cores (5a) bent in a half moon shape when connected.

A stator for a rotating electric machine includes a laminate stack having a plurality of slots open towards an air gap between the stator and a rotor of the electric machine. A winding includes coils which have turns that pass through the slots of the laminate stack. The turns of the coils are electrically insulated the within the slots from each other and from the laminate stack by a ceramic material.

A stator for a high efficiency motor, and a manufacturing method of such a stator, the stator including a stator core partitioned into a center hole and inner spaces. The stator core includes a yoke portion and a plurality of teeth. The stator includes coils coiled around the plurality of teeth, respectively, and filling parts filling the inner spaces, respectively. The filling parts are configured to prevent magnetic flux leakage from occurring between the coils coiled around the plurality of teeth.

A rotary electric machine including a rotor having salient poles, each salient pole comprising a pole body surrounded by at least one coil, and at least one pair of wedges comprising a first wedge positioned against the coil of a first salient pole and a second wedge positioned against the coil of a second salient pole consecutive with the first. The first and second wedges are able to move in the inter-pole space with respect to one another along the longitudinal axis of the rotor, and each having at least one contact surface, the contact surface or surfaces of the first wedge being configured to come into contact with the contact surface or surfaces of the second wedge as one wedge is moved longitudinally with respect to the other in such a way that the movement of one wedge with respect to the other induces a pressing of these wedges against the coils so as to hold the coils of the first and second salient poles respectively against the pole bodies of the first and second salient poles.

A stator for a high efficiency motor and a manufacturing method of a stator for a high efficiency motor are disclosed. The method includes: preparing filling powder by coating a surface of soft magnetic powder with an insulating layer; providing a stator core partitioned into a center hole and inner spaces, the stator core including a yoke portion and a plurality of teeth; coiling coils around the plurality of teeth located in the inner spaces, respectively; and filling the inner spaces with a mixture of the filling powder and an adhesive, and curing the mixture of the filling powder and the adhesive.

The invention relates to a stator for an electric motor, including at least one winding of a wire made of an electrical conductor composed primarily of aluminum covered with a thickness of between 30 and 100 m of an insulator including at least one polymer chosen from among the polyaryletherketones (PAEK).

A stator of a rotary electrical machine has a stator body formed by a stack of metal sheets. The stator body is delimited by inner and outer radial surfaces. Notches in the stator body extend axially. Each notch has a notch base and a notch opening, and the notch opening is on the side of the inner radial surface. A stator winding is supported by the stator body, and the winding has a plurality of winding parts. Each part is accommodated in one of the notches. Each of the notches at the notch opening has a closure element. Each winding par in a notch is retained between the notch base and the closure element. The closure elements are formed by offsetting at least one of the metal sheets of an adjacent notch in the direction of the notch.

A stator that includes an annular stator core having a plurality of slots each having a coil insertion opening that opens in a radial direction, and recesses formed in circumferential side walls and extending in an axial direction; a coil including slot accommodated portions accommodated in the plurality of slots; and a wedge containing a thermoplastic resin and engaged with the recesses so as to close at least a part of the coil insertion opening as viewed in the radial direction of the stator core.

A tooth-wound coil of a stator or of a stator segment of a dynamo-electric machine having two straight sections spaced apart from each other and running substantially parallel. Two 180? curves are located on the ends thereof, wherein the straight sections have an active part area, the axial extend of which is less than or equal to that of the straight section. The tooth-wound coil has a symmetrical extension plane running in the longitudinal direction. An insulation material is provided around the straight sections of the tooth-wound coil. The material effects groove isolation and/or phase isolation in the stator or stator segment.