A stator for an electric motor includes a stator body forming a ring, the inner face of which is provided with teeth delimiting two by two notches open towards the inside of the stator body; U-shaped conductor segments, partially inserted into the notches of the stator body; and an electrical connection component to electrically connect the conductor segments together. The stator further includes a case for circulating a cooling fluid having a first fluid circulation channel, called the inlet channel, and a second fluid circulation channel, the outlet channel, the inlet and outlet channels being fluidly connected by connecting channels. Each connecting channel is formed by a cavity through each conductor segment along its entire length, the central cavity extending from an inlet end to an outlet end, the inlet end opening into the inlet channel and the outlet end opening into the output channel.

A stator for an electric motor includes a stator body forming a ring, the inner face of which is provided with teeth delimiting two by two notches open towards the inside of the stator body; U-shaped conductor segments, partially inserted into the notches of the stator body; and an electrical connection component to electrically connect the conductor segments together. The stator further includes a case for circulating a cooling fluid having a first fluid circulation channel, called the inlet channel, and a second fluid circulation channel, the outlet channel, the inlet and outlet channels being fluidly connected by connecting channels. Each connecting channel is formed by a cavity through each conductor segment along its entire length, the central cavity extending from an inlet end to an outlet end, the inlet end opening into the inlet channel and the outlet end opening into the output channel.

In the electric rotating machine, a crank portion that is displaced in a radial direction of an armature iron core is provided in an apex portion of a coil end portion; a first oblique side that slants with respect to an axis-direction endface of the armature iron core connects a first coil conductor portion with the crank portion; a second oblique side that slants with respect to the axis-direction endface of the armature iron core connects a second coil conductor portion with the crank portion; at least one of the first oblique side and the second oblique side has an inflection point, before being connected with the crank portion, that functions as a base point of a bending portion that is bent toward a radially outside of the armature iron core.

In the electric rotating machine, a crank portion that is displaced in a radial direction of an armature iron core is provided in an apex portion of a coil end portion; a first oblique side that slants with respect to an axis-direction endface of the armature iron core connects a first coil conductor portion with the crank portion; a second oblique side that slants with respect to the axis-direction endface of the armature iron core connects a second coil conductor portion with the crank portion; at least one of the first oblique side and the second oblique side has an inflection point, before being connected with the crank portion, that functions as a base point of a bending portion that is bent toward a radially outside of the armature iron core.

A rotary electric machine includes a stator and a rotor. The stator includes a stator core, coils, and a power line. The stator core includes slots. The coils are individually inserted in the slots and attached to the stator core. The power line couples a power source to the coils. Each coil includes projections and insertion portions. The projections are opposite ends of the corresponding coil and project from the stator core. The insertion portions are portions of the corresponding coil and inserted in the slots. The coils include general coils and power-line coils. The projections of each general coil serve as a first coupler and a second coupler. The projections of each power-line coil serve as a power-line coupler and a general coupler. The power-line coils and at least one of the general coils are same in length. The power-line coupler is coupled to the power line.

A rotary electric machine includes a stator and a rotor. The stator includes a stator core, coils, and a power line. The stator core includes slots. The coils are individually inserted in the slots and attached to the stator core. The power line couples a power source to the coils. Each coil includes projections and insertion portions. The projections are opposite ends of the corresponding coil and project from the stator core. The insertion portions are portions of the corresponding coil and inserted in the slots. The coils include general coils and power-line coils. The projections of each general coil serve as a first coupler and a second coupler. The projections of each power-line coil serve as a power-line coupler and a general coupler. The power-line coils and at least one of the general coils are same in length. The power-line coupler is coupled to the power line.

Systems for a voltage balanced multi-set hairpin windings for electric motors are provided. The systems comprise a stator assembly of an electric motor system, a plurality of radial slots positioned around an inner cylindrical surface, and a winding scheme for the stator assembly including alternating positioning of a hairpin wire having a seven slot span and another hairpin wire having a five slot span in four sub-circuits.

A stator for a rotary electric machine includes a stator core with slots and a stator winding. The stator winding includes a phase winding including segment conductors inserted in the slots. The phase winding includes parallel conductors connected in series. Each of the parallel conductors includes segment conductors connected in parallel. When one parallel conductor is regarded as a reference parallel conductor, and the segment conductors constituting the reference parallel conductor are regarded as reference segment conductors, each reference segment conductor includes a first conductor portion constituting a first conductor portion group, and a second conductor portion constituting a second conductor portion group. One reference segment conductor includes an outer conductor portion, as the first conductor portion, located on the outermost position in the first conductor portion group, and an inner conductor portion, as the second conductor portion, located on the innermost position in the second conductor portion group.

A stator for a rotary electric machine includes a stator core with slots and a stator winding. The stator winding includes a phase winding including segment conductors inserted in the slots. The phase winding includes parallel conductors connected in series. Each of the parallel conductors includes segment conductors connected in parallel. When one parallel conductor is regarded as a reference parallel conductor, and the segment conductors constituting the reference parallel conductor are regarded as reference segment conductors, each reference segment conductor includes a first conductor portion constituting a first conductor portion group, and a second conductor portion constituting a second conductor portion group. One reference segment conductor includes an outer conductor portion, as the first conductor portion, located on the outermost position in the first conductor portion group, and an inner conductor portion, as the second conductor portion, located on the innermost position in the second conductor portion group.

An Integrated Starter Generator System The present invention relates to an Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 6n stator teeth (132′), ‘n’ being a natural number, and each stator tooth (132′) has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 6n±2 rotor poles (134′) facing the stator, and magnets on the rotor poles (134′) are disposed with an alternating sequence of magnet polarity facing the stator (132).