Back to results
US 4,682,410 AGranted
Process of making a dynamo electric machine
AssigneeRobert Bosch GmbH
InventorsHelmut Kreuzer, Klaus-Peter Meier
Life of this patent
Estimating the term…
Abstract
The commutating poles of vehicular-type d-c motors, for example for trolley buses or trolley cars, are made by winding, on edge, a copper strip, permitting the wound copper strip to resiliently, spring-like expand so that the individual spiral loops thereof will be slightly spaced from each other, and then exposing the copper strip in a fluidized bed to an insulating powder, for example polyethylene or polyurethane, which is subsequently cured in a hardening or sintering process.
Claims5
Method of making a commutating pole, for use in a vehicular-type dynamo electric machine, comprising the steps of:
- winding a strip of conductor (6), having essentially rectangular cross-sectional configuration, on edge;
- permitting the completed edge-wound winding to resiliently expand to form spaced spiral winding loops having major surfaces facing one another;
- exposing said expanded spaced spiral loops to a fluidized bed in which a powder, comprising a curable, hardenable insulating material, is suspended, said powder precipitating on the conductor forming the winding loops;
- hardening or curing said powder precipitated on the winding loops to form a coalesced insulating coating on each of said facing major surfaces of said spiral winding loops;
- and
- mounting the thus-insulated edge-wound winding on a commutating pole core (4) of said dynamo electric machine.
3 more elements
Dependencies are inferred from the claim text.