Method to secure armature conductors to the commutator strips in dynamo electric machines
AssigneeRobert Bosch GmbH
InventorGerd Bassler
Life of this patent
Estimating the term…
Abstract
A plurality of conductors forming the armature windings are arranged in a superimposed stack, with their end faces aligned and located over the respective commutator strip or lamella. An electrode presses the stack against the lamella, another electrode, preferably liquid cooled, is applied to the lamella and solder, for example in form of a ribbon, placed against the end faces of the conductors forming the stack. Upon application of current, the solder will melt and flow between the commutator lamella and the conductor strips forming the armature winding to simultaneously, in one step, secure together the conductors and the commutator lamella. The method is particularly applicable to forming the armature windings in d-c motors for example in electric-car driving motors.
Claims10
In the manufacture of dynamo electric machines, a method to secure a plurality of superimposed armature winding conductors (19-22) to a commutator lamella (14) of the commutator of the machine comprising the steps of
- superimposing the end portions of the conductors to form a stack of conductors;
- locating the superimposed stack of conductors over a portion of the respective commutator lamella (14);
- and, in a single operation, resistance-heating and soldering said superimposed conductors and said portion of the lamella to form a solid connection and to simultaneously secure together said conductors and said lamella,
- said heating and soldering step comprising the step of contacting the uppermost of the stack of conductors with a first electrode;
- contacting the lamella with a second electrode
- and pressing said first electrode on said stack to press said stack against the lamella (14) while simultaneously supplying solder to the stack and lamella and passing current therethrough to effect resistance heating and soldering.
Method according to claim 3, wherein said cooling step comprises the step of cooling the electrode.
Dependencies are inferred from the claim text.