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Title:
MOTOR ROTOR AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/142974
Kind Code:
A1
Abstract:
Disclosed in the present invention are a motor rotor and a motor. The rotor comprises a rotor iron core and permanent magnets disposed on the rotor iron core; the rotor core comprises a plurality of laminations that have the same shape and are stacked and coaxially arranged; a shaft installation hole, a plurality of shaft teeth slot holes, and a plurality of air passage holes are formed on each lamination; the plurality of shaft teeth slot holes and the plurality of air passage holes are formed at intervals along the circumference of the shaft installation hole; and in the plurality of laminations, laminations at adjacent layers are relatively offset, such that the air passage holes of the plurality of laminations together form a helical air passage, and the shaft teeth slot holes of the laminations at adjacent layers are aligned in the axial direction of the shaft installation hole. The provision of the helical air passage in the rotor causes air in the helical air passage to form a pressure difference in the axial direction of the rotor during the rotation of the rotor, so as to form an airflow, such that the heat in the motor can be took out, thereby achieving rapid heat dissipation of the motor and protecting the permanent magnets from the risk of demagnetization.

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WO/2022/054470ROTARY ELECTRIC MACHINE
Inventors:
CHEN LIANG (CN)
Application Number:
PCT/CN2021/134657
Publication Date:
July 07, 2022
Filing Date:
November 30, 2021
Export Citation:
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Assignee:
GD MIDEA AIR CONDITIONING EQUIPMENT CO LTD (CN)
MIDEA GROUP SHANGHAI CO LTD (CN)
International Classes:
H02K1/32; H02K1/2706
Domestic Patent References:
WO2017125371A12017-07-27
Foreign References:
CN108432093A2018-08-21
CN110036553A2019-07-19
CN106451856A2017-02-22
Attorney, Agent or Firm:
CHINA WISPRO INTELLECTUAL PROPERTY LLP. (CN)
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