Claims
- 1. A conductive rotor for an electrical machine, having a current-carrying winding comprising a plurality of circumferentially distributed winding portions which lie in at least one winding plane perpendicular to the rotor axis, and extend from a radially inner region to a radially outer region, and a commutator provided by surfaces of the winding portions, the winding being formed of a plurality of integrally formed conductive elements each comprising a metal strip, in which the surfaces providing the commutator are edge surfaces of the metal strip, said edge surfaces being spaced apart from each other to allow fluid flow therebetween for cooling the commutator.
- 2. A conductive rotor as claimed in claim 1, in which the major surfaces of the metal strip are coated adjacent the commutator with an insulating material.
- 3. A conductive rotor as claimed in claim 2, wherein said insulating material has a relatively low wear resistance so that it will readily wear or break away from said major surfaces at their portions adjoining said edge surfaces as the commutator wears during use.
- 4. A conductive rotor as claimed in claim 3, wherein said insulating material is a coating formed by baking a powder coating applied to said conductive sections.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9326353 |
Dec 1993 |
GB |
|
Parent Case Info
[0001] This is a Continuation of U.S. patent application Ser. No. 09/490,829, filed Jan. 25, 2000, and the contents of which are incorporated by reference herein, as if restated in full.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09490829 |
Jan 2000 |
US |
Child |
10121522 |
Apr 2002 |
US |