Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2000-01-27
2001-10-09
Waks, Joseph (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S233000, C029S598000
Reexamination Certificate
active
06300704
ABSTRACT:
PRIOR ART
The invention is based on a rotor for an electric motor and on a process for manufacturing the rotor.
In rotors for commutator or collector machines, the individual, insulated winding wires of the rotor- or armature winding are inserted into axial grooves distributed over the circumference of the rotor body, which is embodied as a laminated stack of sheets, wherein the end faces of the winding wires, which are wound into separate winding coils, protrude as so-called winding heads from the two end faces of the rotor body. The individual connecting wires to the winding coils are conveyed to connection lugs embodied on the individual commutator lamellas using different winding techniques and, by winding the wires the connection lugs around and bending the connection lugs over, are attached and electrically connected to the lugs, for example by means of ultrasonic welding. An exemplary embodiment for a so-called hook commutator and for the embodiment of the so-called hooking technique when fixing the winding connection wires onto the commutator hooks is described in WO 90/04864.
So that no vibrational fractures can be produced in the rotor winding during operation and in particular during the usually required high-stress vibration testing of the rotor, additional measures are required for fixing or stabilizing the connecting wires in the region between the connection lugs and the rotor body. The individual connecting wires of the winding coils which lead to the connection lugs of the individual commutator lamellas will be referred to below as switching wires. As an additional measure for fixing or stabilizing the switching wires, DE 26 20 917 A1 has disclosed placing a number of absorbent strings or belts over the entire circumference around the free winding ends. However, for technical manufacturing reasons an embodiment of this sort is expensive, incurring considerable costs, particularly in a mass production of the rotor.
ADVANTAGES OF THE INVENTION
The rotor according to the invention and the process according to the invention for manufacturing the rotor, has an advantage over the prior art that standard processes for rotor winding already in use can be employed without requiring special adaptations or additional parts in order to increase the stability of the switching wires so that during operation, in particular during vibrational testing, vibrational fractures can no longer occur. It is particularly advantageous that the rotor according to the invention is suitable for high rotational speeds.
Advantageous improvements and updates of the rotor disclosed and the process disclosed are possible by means of the measures taken herein after.
REFERENCES:
patent: 3639789 (1972-02-01), Bednarski
patent: 3659130 (1972-04-01), Lilley et al.
patent: 3668449 (1972-06-01), King
patent: 3713208 (1973-01-01), Doyle
patent: 3924148 (1975-12-01), Tachibana et al.
patent: 3942246 (1976-03-01), Wilding
patent: 3973738 (1976-08-01), Miller
patent: 4039876 (1977-08-01), Takasaka
patent: 5044065 (1991-09-01), Dyke et al.
patent: 5352948 (1994-10-01), Kirn et al.
patent: 5400495 (1995-03-01), Murai
patent: 5470615 (1995-11-01), Sbalchiero et al.
patent: 1763508 (1971-12-01), None
patent: 2620917 (1977-12-01), None
patent: 2351527 (1977-05-01), None
patent: 1045384 (1966-10-01), None
patent: 1136086 (1968-12-01), None
patent: 2 052 170 A (1981-01-01), None
patent: 2250384 (1992-03-01), None
patent: 61236347A (1986-10-01), None
patent: 90/04864 (1988-10-01), None
Fees Hans-Joerg
Kiefer Martin
Maldener Klaus
Schmidt Ralf
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
Waks Joseph
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