Title:
AIR DUCT ASSEMBLY FOR ROTOR, ASSOCIATED ROTOR AND ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/266809
Kind Code:
A1
Abstract:
Embodiments of the present disclosure provide an air duct assembly for a rotor of an electric machine and associated rotor and electric machine. The air duct assembly comprises a base plate arranged between core laminations of the rotor and comprising ventilation holes axially aligned with inlet channels of the rotor respectively; and a plurality of airflow guides axially protruding from a radial outer portion of an end surface of the base plate relative to the ventilation hole, the plurality of airflow guides comprising a plurality of first guiding members extending radially; and a plurality of second guiding members arranged between the first guiding member and the ventilation holes and radially spaced apart from the first guiding member by a predetermined distance. With the gap between the first guiding members and the second guiding members, the airflow guided by the air duct assembly is significantly improved so that heat can be taken away more effectively, and thus the cooling effect is improved. Furthermore, by replacing a whole stripe as used in conventional solutions with a two-member design according to embodiments of the present disclosure, the material for making the airflow guides, such as copper, can be significantly reduced, so that an improved cooling effect can be obtained at low cost.
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Inventors:
YAN PEI (CN)
LI WEIMIN (CN)
LI WEIMIN (CN)
Application Number:
PCT/CN2021/101298
Publication Date:
December 29, 2022
Filing Date:
June 21, 2021
Export Citation:
Assignee:
ABB SCHWEIZ AG (CH)
YAN PEI (CN)
LI WEIMIN (CN)
YAN PEI (CN)
LI WEIMIN (CN)
International Classes:
H02K1/32
Domestic Patent References:
| WO2016070908A1 | 2016-05-12 |
Foreign References:
| EP2884630A1 | 2015-06-17 | |||
| CN103475128A | 2013-12-25 | |||
| CN208797691U | 2019-04-26 | |||
| US4061937A | 1977-12-06 | |||
| CN101689776A | 2010-03-31 | |||
| US4362960A | 1982-12-07 |
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
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