Title:
ROTATING ELECTRIC MACHINE, SET OF IRON CORE OF STATOR AND IRON CORE OF ROTOR, METHOD FOR MANUFACTURING ROTATING ELECTRIC MACHINE, METHOD FOR MANUFACTURING NON-ORIENTED ELECTRICAL STEEL SHEET FOR STATOR AND NON-ORIENTED ELECTRICAL STEEL SHEET FOR ROTOR, METHOD FOR MANUFACTURING STATOR AND ROTOR, AND SET OF NON-ORIENTED ELECTRICAL STEEL SHEETS
Document Type and Number:
WIPO Patent Application WO/2022/210895
Kind Code:
A1
Abstract:
This rotating electric machine includes a stator, a rotor, and a housing that houses the stator and rotor, wherein at least one of the following conditions 1 and 2 is satisfied. Condition 1. The thermal conductivity A of a non-oriented electrical steel sheet used in an iron core of the stator is 12 to 35 W/(m·K), the thermal conductivity B of the non-oriented electrical steel sheet used in an iron core of the rotor is 10 to 33 W/(m·K), and the thermal conductivities of the two satisfy the following formula (1): A > B. Condition 2. The thermal diffusivity A1 of the non-oriented electrical steel sheet used in the iron core of the stator is 3.0×10-6 to 9.0×10-6 m2/sW/(m·K), the thermal diffusivity B1 of the non-oriented electrical steel sheet used in the iron core of the rotor is 2.5×10-6 to 8.5×10-6 m2/sW/(m·K), and the thermal diffusivities of the two satisfy the following formula (3): A1 > B1.
Inventors:
MURAKAWA TESSHU (JP)
NATORI YOSHIAKI (JP)
NATORI YOSHIAKI (JP)
Application Number:
PCT/JP2022/016049
Publication Date:
October 06, 2022
Filing Date:
March 30, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
H02K1/02; C21D8/12; C22C38/00; C22C38/60; H01F1/147; H01F41/02
Domestic Patent References:
| WO2020090160A1 | 2020-05-07 | |||
| WO2021033567A1 | 2021-02-25 |
Foreign References:
| JP2021061620A | 2021-04-15 | |||
| JP2021094807A | 2021-06-24 | |||
| JP5598062B2 | 2014-10-01 |
Other References:
MUNEHIRO KAMIYA: "Doctoral Thesis", 2008, article "Study on High Power Density of HV Drive Motor"
SADAHISA ONIMARUHIROHITO MATSUITOMONARI TAGUCHIKENJI OTAKAEIJI ICHIOKATATSUHIKO MIZUTANI: "Academic Lecture preprint", 2006, SOCIETY OF AUTOMOTIVE ENGINEERS OF JAPAN, article "Thermal Analysis of Motor Cooling Structure Using ATF of Hybrid Electric Vehicle (HEV", pages: 19 - 24
HATA, H.KOJIMA, M.WATANABE, H.MIZUTANI, T. ET AL.: "Development of a new hybrid transmission for FWD sports Utility Vehicles", SAE TECHNICAL PAPER 2005-01-0272, 2005
SADAHISA ONIMARUHIROHITO MATSUITOMONARI TAGUCHIKENJI OTAKAEIJI ICHIOKATATSUHIKO MIZUTANI: "Academic Lecture preprint", 2006, SOCIETY OF AUTOMOTIVE ENGINEERS OF JAPAN, article "Thermal Analysis of Motor Cooling Structure Using ATF of Hybrid Electric Vehicle (HEV", pages: 19 - 24
HATA, H.KOJIMA, M.WATANABE, H.MIZUTANI, T. ET AL.: "Development of a new hybrid transmission for FWD sports Utility Vehicles", SAE TECHNICAL PAPER 2005-01-0272, 2005
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF: