Rotating electric machine and method for manufacturing rotor
AssigneeHonda Motor Co., Ltd.
InventorsYuji Ono, Tomoya Otani, Keiji Tada, Kaoru Tomioka, Tsutomu Yoshino, Kimiaki Nakamura
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Abstract
A rotor constituting a rotating electric machine includes a rotating shaft and a permanent magnet. A sleeve covering the outer surface of the permanent magnet is attached to the rotating shaft. The sleeve is made of a carbon fiber reinforced polymer. A resin film is joined to an outer circumferential wall of the sleeve via a joining material. A plurality of ridges are formed on the outer circumferential wall of the resin film. A riblet recessed relatively to the plurality of ridges is formed between the plurality of ridges.
Claims7
A method of manufacturing a rotor that includes a rotating shaft and a permanent magnet held on the rotating shaft and is surrounded by a stator in a rotating electric machine, the method comprising:
- covering an outer surface of the permanent magnet by a sleeve made of a carbon fiber reinforced polymer to attach the sleeve;
- and
- joining a resin film to an outer circumferential wall of the sleeve via a joining material,
- wherein
- a ridge structure is formed in advance on an outer circumferential wall of the resin film,
- the joining of the resin film is performed to obtain the rotor in which the ridge structure is formed as one or a plurality of convex portions forming a plurality of ridges extending in parallel to each other, and a riblet recessed relative to the plurality of ridges is formed between the plurality of ridges, and
- the resin film includes an inner layer covering the outer circumferential wall of the sleeve via the joining material and an outer layer covering an outer circumference of the inner layer, the outer layer is made of an ultraviolet curable resin, and the method further comprises irradiating the outer layer with an ultraviolet ray after the joining of the resin film.
Dependencies are inferred from the claim text.