Stator of rotating electrical machine and rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9379588-B2
Application number	US-201313745171-A
Country	US
Kind code	B2
Filing date	Jan 18, 2013
Priority date	Jul 20, 2010
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

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.

First claim

What is claimed is:

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.

2. 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 are disposed at a radially inner circumference side with respect to the stator core; 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 the interphase insulation paper pieces for insulation of the coils belonging to different phases have 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;
wherein the plurality of unit coils of each-phase stator coil group is series connected into a series circuit, and the series circuit has two terminals one of which is connected to a power supply terminal and the other of which is connected to a neutral terminal, thereby to be connected into an adjacent pole connection; and
wherein the plurality of interphase insulation paper pieces includes one piece which is configured to insulate between coil ends of the first and second unit coils of the phase located at an inner circumference side and coil end of the unit coil constituting the phase located at an outer circumference side, the one piece having a central part which is bent to the inner circumference side to be inserted between the coil ends of the first and second unit coils, the one piece having two ends inserted between the coil ends of the first and second unit coils and coil ends of the unit coils located at both circumferential sides of the first and second unit coils and belonging to the phase identical with the phase of the first and second unit coils, respectively.

3. A rotating electrical machine comprising the stator defined in claim 1 or 2 .

Assignees

• Matsubara Masakatsu
• Seo Yoichi
• Hanai Takashi
• Ito Wataru
• Toshiba Kk
• Toshiba Ind Products Mfg Corp

Inventors

• Matsubara Masakatsu
• Seo Yoichi
• Hanai Takashi
• Ito Wataru

Classifications

• H02K3/38 Primary

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