Stator of rotating electrical machine and rotating electrical machine

摘要

A stator of a rotating electrical machine includes a stator core, plural stator coil groups constituting plural phases, plural pieces of interphase insulation paper for insulation of coils belonging to different phases, and plural connecting strips formed integrally with the interphase insulation paper pieces. Each interphase insulation paper piece has ends inserted between coil ends of unit coils belonging to an identical phase thereby to function as interphase insulation paper for insulation of coils belonging to the identical phase. Each interphase insulation paper piece for insulation of coils belonging to the different phases, functioning as the interphase insulation paper piece for insulation of coils of the identical phase, insulates between coil ends of the first unit coils of respective first and second series circuits constituting the inner circumference side phase and a coil end of the unit coil constituting the outer circumference side phase.

主权项

1. A stator of a rotating electrical machine, comprising:
a stator core which is annular in shape; a plurality of stator coil groups constituting a plurality of phases, each-phase stator coil group being wound on the stator core and including a plurality of unit coils connected to each other and arranged in a radial direction with respect to the stator core; a plurality of pieces of interphase insulation paper for insulation of coils belonging to different phases, disposed at both axial ends of the stator core between coil ends of the unit coils which belong to different phases and is disposed at a radially inner circumference side with respect to the stator core, said interphase insulation paper pieces having ends which are inserted between the coil ends of the unit coils belonging to an identical phase, respectively, thereby to function as interphase insulation paper for insulation of coils belonging to the identical phase; and a plurality of connecting strips formed integrally with the interphase insulation paper pieces and each connecting a pair of interphase insulation paper pieces disposed at both ends of the stator core when inserted in a slot of the stator core, wherein each-phase stator coil group includes a plurality of unit coils which are divided into a first series circuit and a second series circuit, and each one of the series circuits has one of two terminals connected to a power supply terminal and the other connected to a neutral terminal, whereby the unit coils are connected into an adjacent pole connection manner or an alternate pole connection manner; and wherein each interphase insulation paper piece for insulation of coils belonging to the different phases, functioning as the interphase insulation paper piece for insulation of coils belonging to the identical phase, insulates between coil ends of the first unit coils of the respective first and second series circuits constituting a stator inner circumference side phase and coil end of the unit coil constituting a stator outer circumference side phase, said each interphase insulation paper piece having ends inserted between the coil ends of the first unit coils of the respective first and second series circuits constituting a stator inner circumference side phase and the coil end of the unit coil which is circumferentially adjacent to the coil ends of the first unit coils and constitutes a phase identical with a phase of the first unit coils of the respective first and second series circuits, said coil ends of the first unit coils having a largest shared voltage in the adjacent pole connection manner or the alternate pole connection manner out of the unit coils belonging to the identical phase.