A permanent magnet electrical machine has a rotor supporting a circumferential row of permanent magnets. The electrical machine further has a stator coaxial with the rotor and having a circumferential row of stator teeth carrying respective coils. The teeth provide paths for magnetic flux produced by the magnets, thereby electromagnetically linking the magnets and the coils when the rotor rotates relative to the stator. The teeth have respective core portions on which the coils are mounted, and respective tip portions located between the core portions and the rotor, neighbouring tip portions being circumferentially spaced from each other by respective gaps. Each pair of neighbouring tip portions has a bridge member and a thermal switching mechanism carried by a first tip portion of the pair.

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 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 drive motor for a vehicle includes: a stator and a rotor, in which the stator includes: stator teeth which are disposed between multiple slots, respectively, the multiple slots being formed at predetermined intervals in a circumferential direction corresponding to an outer circumferential surface of the rotor, and have a blocking portion which protrudes toward one of the slots disposed at both sides, the blocking portion formed at one side of an inner circumferential surface of each of the stator teeth facing the rotor, and a groove which is formed radially outward at an opposite side of the inner circumferential surface of each of the stator teeth; and opening sections each of which is in communication with the slot and formed between the blocking portion and the opposite side of the inner circumferential surface of the stator tooth adjacent to the blocking portion, and the slot is opened radially through the opening section.

A drive motor for a vehicle includes: a stator and a rotor, in which the stator includes: stator teeth which are disposed between multiple slots, respectively, the multiple slots being formed at predetermined intervals in a circumferential direction corresponding to an outer circumferential surface of the rotor, and have a blocking portion which protrudes toward one of the slots disposed at both sides, the blocking portion formed at one side of an inner circumferential surface of each of the stator teeth facing the rotor, and a groove which is formed radially outward at an opposite side of the inner circumferential surface of each of the stator teeth; and opening sections each of which is in communication with the slot and formed between the blocking portion and the opposite side of the inner circumferential surface of the stator tooth adjacent to the blocking portion, and the slot is opened radially through the opening section.

The present invention relates to an electric machine comprising a rotor (1) and a stator (2) having a wall (3) opposite the rotor, said stator comprising a multiplicity of radial slots arranged circumferentially along said stator. Said slots are provided with apertures (6) opening into said inner wall that are closed by closing means (7, 8) so as to form a multiplicity of closed slots (5).

The present invention relates to an electric machine comprising a rotor (1) and a stator (2) having a wall (3) opposite the rotor, said stator comprising a multiplicity of radial slots arranged circumferentially along said stator. Said slots are provided with apertures (6) opening into said inner wall that are closed by closing means (7, 8) so as to form a multiplicity of closed slots (5).

A permanent magnet generator, includes a cylindrical rotor assembly having a set of circumferentially-spaced permanent magnets arranged at an outer radius of the rotor assembly, and spaced from one another by non-magnetic spacing element, and a stator assembly configured to coaxially receive the rotor assembly. The stator assembly includes a cylindrical stator core, a circumferentially spaced set of posts extending from the stator core and defining a set of stator slots between adjacent posts, and a set of conductive windings wound about the stator slots.

A permanent magnet generator, includes a cylindrical rotor assembly having a set of circumferentially-spaced permanent magnets arranged at an outer radius of the rotor assembly, and spaced from one another by non-magnetic spacing element, and a stator assembly configured to coaxially receive the rotor assembly. The stator assembly includes a cylindrical stator core, a circumferentially spaced set of posts extending from the stator core and defining a set of stator slots between adjacent posts, and a set of conductive windings wound about the stator slots.

An electric machine includes a stator having teeth that define open slots and slot closers disposed in the slots. Each slot closers includes a flux bridge surrounded by a nonmagnetic case. The slot closer is disposed between adjacent ones of the teeth with the case engaging and spanning the adjacent teeth. The case forms nonmagnetic gaps between the flux bridge and the adjacent teeth, respectively, to reduce potential for torque ripple.