A conductor a method of forming a conductor can include providing a hollow base conductor defining a fluid channel along the base conductor, and a solid conductor arranged about the perimeter of the hollow base conductor, wherein the fluid channel can be configured to allow a fluid to flow via the channel.

A hollow low-current single-phase induction motor capable of starting under its own power may have a stator and a rotor. The stator may comprise a case and a winding. The case may have a base, an annular outer circumferential wall, an annular inner circumferential wall, a plurality of first extensions formed at the outer circumferential wall, and a plurality of second extensions formed at the inner circumferential wall so as to respectively face the first extensions. The rotor may have a flange, a plurality of coil supports formed along the outside circumference of the flange, and a plurality of annular rotor coils which are attached to the respective coil supports. The coil supports may be inserted between the first extensions and the second extensions such that at least one thereamong is misaligned in the circumferential direction relative to the first extensions and the second extensions.

A hollow low-current single-phase induction motor capable of starting under its own power may have a stator and a rotor. The stator may comprise a case and a winding. The case may have a base, an annular outer circumferential wall, an annular inner circumferential wall, a plurality of first extensions formed at the outer circumferential wall, and a plurality of second extensions formed at the inner circumferential wall so as to respectively face the first extensions. The rotor may have a flange, a plurality of coil supports formed along the outside circumference of the flange, and a plurality of annular rotor coils which are attached to the respective coil supports. The coil supports may be inserted between the first extensions and the second extensions such that at least one thereamong is misaligned in the circumferential direction relative to the first extensions and the second extensions.

An electric circulatory leverage drive method and apparatus to replace industrial motors in a variety of applications. The invention includes a hubless magnetic gyroscope that creates leveraged rotational torque/horsepower from its perimeter, that is propelled by a circulatory field double helix coil assembly located proximate to the magnetic gyroscope, and that produce both phasing electromagnetic energy in one of its two strands while the second strand returns the unused portion of the electromagnetic fields to the power source as electricity to increase overall efficiency. Connected to the hubless gyroscope is a means to transfer rotation from the gyroscope to the end use. The present invention is capable of replacing conventional electric motors with a more efficient, compact and lightweight alternative.

An electric circulatory leverage drive method and apparatus to replace industrial motors in a variety of applications. The invention includes a hubless magnetic gyroscope that creates leveraged rotational torque/horsepower from its perimeter, that is propelled by a circulatory field double helix coil assembly located proximate to the magnetic gyroscope, and that produce both phasing electromagnetic energy in one of its two strands while the second strand returns the unused portion of the electromagnetic fields to the power source as electricity to increase overall efficiency. Connected to the hubless gyroscope is a means to transfer rotation from the gyroscope to the end use. The present invention is capable of replacing conventional electric motors with a more efficient, compact and lightweight alternative.

According to an embodiment, a stator winding comprises: a plurality of stator bars; and a connection structure. Each of the stator bars penetrates each of the stator slots and has at least one hollow element wire inside of which a flow hole for a cooling medium is formed. A connection structure has: a sleeve whose axial one end is fitted to the vicinity of an end of the stator bar; a closing plate disposed at the other end of the sleeve; and a hollow extension pipe. The hollow extension pipe is disposed in a space defined by the sleeve and the closing plate at the end of the stator bar, and makes the flow hole of the hollow element wire and an outside of the space communicate each other. A brazing material is filled in the space.

A rotary electric machine includes a stator core having a plurality of teeth arranged in a row along a circumferential direction of the stator core, and a stator coil composed of a winding wire wound around the teeth. The stator coil includes coil end portions extending, outside the stator core in an axial direction thereof, along a substantially circumferential direction of the stator core, and straight portions extending along the axial direction, the straight portions being at least partially housed in a slot which is a void defined by two adjacent teeth of the plurality of teeth. In the rotary electric machine, a cooling groove is formed at least in the straight portion, the cooling groove functioning as a cooling channel through which a cooling fluid flows, and each straight portion includes only one cooling channel.

A rotor for an asynchronous rotary electrical machine with non-through shaft comprising a cylindrical magnetic mass gripped between two mounting flanges of two half-shafts.

It comprises cooling means that are able to cool the rotor.

A stator for an electric motor, including a stator ring with slots arranged on the inner or the outer circumference, wherein each slot accommodates a plurality of conductors extending along the slot and having a rectangular cross-section, each of which is covered by an insulation layer, wherein to form a channel through which a coolant can flow, the insulation layer of at least one of the conductors has at least one recess extending along the conductor.

A stator for an electric motor, including a stator ring with slots arranged on the inner or the outer circumference, wherein each slot accommodates a plurality of conductors extending along the slot and having a rectangular cross-section, each of which is covered by an insulation layer, wherein to form a channel through which a coolant can flow, the insulation layer of at least one of the conductors has at least one recess extending along the conductor.