US 12,323,005 B2
Rotor and method for manufacturing rotor
Toshihiro Uchida, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Apr. 26, 2024, as Appl. No. 18/647,600.
Application 18/647,600 is a continuation of application No. 17/426,818, granted, now 11,996,738, previously published as PCT/JP2020/039280, filed on Oct. 19, 2020.
Claims priority of application No. 2019-202189 (JP), filed on Nov. 7, 2019.
Prior Publication US 2024/0297540 A1, Sep. 5, 2024
Int. Cl. H02K 1/276 (2022.01)
CPC H02K 1/2766 (2013.01) [H02K 2213/03 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A rotating electrical machine comprising:
a rotor including:
a rotor core having magnet accommodation cavities; and
eight permanent magnets embedded in the magnet accommodation cavities of the rotor core, respectively, the permanent magnets each including a bent portion located toward a radially inner side of the rotor core, the permanent magnets generating magnetic torque, an outer core portion located radially outward from the permanent magnets in the rotor core and generating reluctance torque; and
a stator including:
a stator core having twelve teeth, the teeth arranged along a circumferential direction and each extending toward the rotor; and
coils wound around the teeth, respectively, in a concentrated manner, wherein
in a single rotor magnetic pole including a permanent magnet and the outer core portion located radially outward from the permanent magnet, a surface area of a portion of the permanent magnet opposing the outer core portion is larger than and smaller than 1.5 times an area of an outer circumferential surface of the rotor core allocated for the single rotor magnetic pole.