公开(公告)号：US20190140530A1

公开(公告)日：2019-05-09

申请号：US16096552

申请日：2017-07-31

Applicant: Hitachi, Ltd.

Inventor： Kazuo NISHIHAMA ,  Masanori SAWAHATA ,  Takayuki KOYAMA ,  Makoto IMURA ,  Yuuichirou YOSHITAKE ,  Kenichi SUGIMOTO ,  Kengo UEDA

IPC: H02K17/16 ,  H02K1/26 ,  H02K17/20

Abstract: There is provided a rotary electric machine that ensures improving a maximum torque and a rated power factor while reducing an increase in a starting current. In view of this, the rotary electric machine includes a shaft, a rotor, and a stator. The rotor is fixed to an outer periphery of the shaft. The stator is located so as to surround an outer periphery of the rotor. The rotor includes a rotor iron core including a plurality of rotor slots located at predetermined intervals in a circumferential direction and rotor bars inserted into the rotor slots. Rotor slits communicate with outer peripheral sides of the rotor slots. The rotor slits have a width ws in a circumferential direction. The width ws is smaller than a height hs in a radial direction of the rotor slit, and when a rated current is denoted as I1, a turn ratio (primary/secondary) is denoted as Tr, and a magnetic permeability in a vacuum is denoted as μ0, a relationship of ws>μ0×I1×Tr/0.6 is met.

公开(公告)号：US20150340920A1

公开(公告)日：2015-11-26

申请号：US14700393

申请日：2015-04-30

Applicant: Hitachi, Ltd.

Inventor： Kenji IKEDA ,  Hiroaki KOJIMA ,  Motonobu IIDUKA ,  Shoichi MARUYAMA ,  Kengo UEDA ,  Daisuke KAMEGAWA

IPC: H02K3/30 ,  H02K3/34

CPC classification number: H01B3/40 ,  C09D163/00 ,  H02K3/30 ,  H02K3/34 ,  H02K3/40 ,  H02K15/12

Abstract: The rotating electrical machine of the present invention includes a stator coil obtained by curing the impregnating resin injected into the whole stator coil unit after an electrically insulated coil unit with a mica tape having been wrapped around a conductor is slotted into stator iron core slots via a slot liner. The high-heat-resistance resin component of the slot liner contains at least an epoxy resin having 3 or more epoxy groups. The high-heat-resistance resin component of the mica tape contains at least an alicyclic epoxy resin. The impregnating resin contains a bifunctional epoxy resin, and an acid curing agent having one acid anhydride skeleton. With the impregnating resin, the high-heat-resistance resin components of the slot liner and the mica tape form a liner cured portion and a mica insulating layer portion as an integral unit of different resin compositions inside the slot.

Abstract translation: 本发明的旋转电机包括定子线圈，该定子线圈通过在将具有缠绕在导体上的云母带的电绝缘线圈单元经由一个定子铁芯槽中经由一个定子铁芯槽插入整个定子线圈单元中来固化浸渍树脂 槽衬。 槽衬套的高耐热性树脂成分至少含有具有3个以上环氧基的环氧树脂。 云母带的高耐热性树脂成分至少含有脂环式环氧树脂。 浸渍树脂含有双官能环氧树脂和具有一个酸酐骨架的酸固化剂。 使用浸渍树脂，槽衬里的高耐热树脂组分和云母带形成衬套固化部分和作为槽内的不同树脂组合物的整体单元的云母绝缘层部分。