Title:
ROTATING ELECTRICAL MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/172479
Kind Code:
A1
Abstract:
One embodiment of the rotating electric machine according to the present invention comprises: a rotor rotatable about the central axis; and a stator located outside the rotor in the radial direction. The rotor has a rotor core having a plurality of housing holes and a plurality of magnets respectively housed in the plurality of housing holes. The stator has: a stator core having an annular core back surrounding the rotor core and a plurality of teeth extending inward in the radial direction from the core back and disposed side by side at intervals in the circumferential direction; and a plurality of coils attached to the stator core. The plurality of magnets constitute poles and are disposed in the circumferential direction with the q-axis interposed therebetween. The rotor core has a pair of groove portions spaced on both sides sandwiching the q-axis in the circumferential direction in the outer circumferential surface when viewed in the axial direction and hollowed inward in the radial direction. When the maximum dimension of the groove portions in the radial direction is denoted by L1 and the minimum dimension of the space between the pair of groove portions in the circumferential direction is denoted by L2, the relationship of 0.8 ≤ (L2/L1) ≤ 1.2 is satisfied.
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Inventors:
WATAHIKI MASANORI (JP)
Application Number:
PCT/JP2021/021979
Publication Date:
August 18, 2022
Filing Date:
June 09, 2021
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K1/27; H02K1/22; H02K21/14
Domestic Patent References:
| WO2018235145A1 | 2018-12-27 |
Foreign References:
| JP2005354798A | 2005-12-22 | |||
| JP2017050965A | 2017-03-09 | |||
| JP2017085821A | 2017-05-18 |
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