Title:
ROTARY ELECTRIC MACHINE AND SLIT-FORMING METHOD FOR ROTOR SLOT
Document Type and Number:
WIPO Patent Application WO/2024/024071
Kind Code:
A1
Abstract:
In order to provide a rotary electric machine with which it is possible to improve heat dissipation characteristics of a rotor and in which temperature characteristics do not decline even when using a die cast rotor, the present invention is characterized by comprising a rotor formed by laminating electromagnetic steel sheet, and a stator disposed on the outer circumference of the rotor, the rotor being a die cast rotor in which a plurality of rotor bars are formed at prescribed intervals in the circumferential direction, the die cast rotor being formed by a die cast member flowing inside a rotor slot extending in the axial direction, the rotor slot being an open slot via which the rotor bar is exposed from a slit formed on the outer circumference, the circumferential direction width of the slit being less than the circumferential direction width of the rotor bar, the side wall of the slit exposing the side surface (laminated surface) of the electromagnetic steel sheet, and the slit being a slit groove in which the depth to the exposed part of the rotor bar is greater than the depth to the non-exposed part of the rotor bar.
Inventors:
YASUNAGA MASAHIRO (JP)
SUGIMOTO SHINJI (JP)
FUJII KATSUHIKO (JP)
SUGIMOTO SHINJI (JP)
FUJII KATSUHIKO (JP)
Application Number:
PCT/JP2022/029232
Publication Date:
February 01, 2024
Filing Date:
July 29, 2022
Export Citation:
Assignee:
HITACHI INDUSTRIAL PRODUCTS LTD (JP)
International Classes:
H02K17/16
Domestic Patent References:
| WO2009084251A1 | 2009-07-09 | |||
| WO2015093433A1 | 2015-06-25 |
Foreign References:
| JP2021061701A | 2021-04-15 | |||
| JP2012143034A | 2012-07-26 | |||
| JPH07288958A | 1995-10-31 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
Download PDF: