US 12,249,872 B2
Rotor, rotary machine, and method for manufacturing rotor
Yuji Ono, Saitama (JP); Kaoru Tomioka, Saitama (JP); Keiji Tada, Saitama (JP); and Koji Ueda, Saitama (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Aug. 9, 2022, as Appl. No. 17/883,624.
Claims priority of application No. 2021-157428 (JP), filed on Sep. 28, 2021.
Prior Publication US 2023/0094490 A1, Mar. 30, 2023
Int. Cl. H02K 1/28 (2006.01); H02K 1/278 (2022.01); H02K 15/03 (2006.01)
CPC H02K 1/28 (2013.01) [H02K 1/278 (2013.01); H02K 15/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor comprising:
a rotor shaft rotatable about an axis;
a permanent magnet disposed on an outer periphery of the rotor shaft; and
a sleeve disposed on an outer periphery of the permanent magnet and pressing the permanent magnet toward the rotor shaft,
wherein the sleeve comprises a first layer, a second layer, and a third layer disposed concentrically in an axial direction of the sleeve,
the first layer, the second layer, and the third layer are integrated side by side in this order from a radial center of the sleeve toward an outside,
the first layer comprises a first fiber-reinforced resin comprising a first carbon fiber extending in a direction inclined with respect to both the axis of the rotor shaft and a circumferential direction of the sleeve,
the second layer comprises a second fiber-reinforced resin comprising a second carbon fiber extending along the circumferential direction of the sleeve,
the third layer comprises a third fiber-reinforced resin comprising a third carbon fiber extending along the circumferential direction of the sleeve, and
an elastic modulus of the third layer is larger than an elastic modulus of the second layer,
wherein a thickness of the first layer is less than a thickness of the second layer, and a thickness of the first layer is less than a thickness of the third layer.