| 摘要 |
Commutator for electrical apparatus and equipment, in particular rotary electric machines, comprising a supporting member (45) and a number of electrically conductive segments (51-59) provided at a surface (45A) of the supporting member (45) and being electrically insulated from each other. At least said surface (45A) of the supporting member (45) consists substantially of aluminium. The surface (45A) is provided with a coating mainly of alumina (Al2O3) applied by thermal spraying of a powder material having alumina as a substantial ingredient. The electrically conductive segments (51-59) are applied on the alumina coating in the form of a copper layer. |
