Title:
INDUCTION MOTOR AND RAILWAY VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/021839
Kind Code:
A1
Abstract:
Provided are an induction motor and a railway vehicle compatible with high efficiency and high rotation speed. The induction motor 1 of the present invention comprises a shaft 8, a rotor 3 rotating along with the shaft 8, and a stator 2 arranged so as to face the rotor 3 across an air gap. The rotor 3 has a rotor core 7 rotatably holding the shaft 8, a plurality of slots 6 provided to the rotor core 7, conductor rods 13 provided in the slots 6, a pair of short-circuit rings secured to both ends of the conductor rods 13 in the axial direction and short-circuiting the plurality of conductor rods 13, and an annular member 12 securing the pair of short-circuit rings 14 from the outside. The conductor rods 13 and the short-circuit ring 14 are formed by die casting of aluminum or copper, and the annular member 12 has a tensile strength of 260 N/mm2 or more and a conductivity of 70 IACS% or more at 20°C.
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Inventors:
SUGIMOTO SHINJI (JP)
KINOSHITA HIROTAKA (JP)
FUJII KATSUHIKO (JP)
KINOSHITA HIROTAKA (JP)
FUJII KATSUHIKO (JP)
Application Number:
PCT/JP2022/024642
Publication Date:
February 23, 2023
Filing Date:
June 21, 2022
Export Citation:
Assignee:
HITACHI INDUSTRIAL PRODUCTS LTD (JP)
International Classes:
H02K17/16
Foreign References:
| US20050017597A1 | 2005-01-27 | |||
| JP2014023413A | 2014-02-03 | |||
| US20050073216A1 | 2005-04-07 | |||
| JPH04120227A | 1992-04-21 | |||
| JPH1052013A | 1998-02-20 | |||
| JPH0946988A | 1997-02-14 | |||
| US20150349616A1 | 2015-12-03 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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