Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1974-08-30
1976-02-10
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310128, 310227, H02K 3700
Patent
active
039379930
ABSTRACT:
A DC permanent magnet machine having stator and rotor assemblies of the "inside out" design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. The rotor is provided with a plurality of permanent magnet poles equal in number to the poles provided in the stator. A plurality of roller contact assemblies mounted upon the rotor serve to progressively and sequentially couple the commutator bars to brush rings and through brushes to opposite polarities of a DC energizing source, thereby sequentially providing electrical power to associated coils of the stator winding. The interaction of the magnetic field created by the energized stator coils and the magnetic field of the permanent magnets in the rotor assembly causes rotation of the rotor which, in turn, rotates the roller contacts to continuously and progressively switch the DC source to succeeding stator coils. The roller contacts are arranged in an assembly which greatly enhances the dynamic stability of the rollers despite uneven wear of the rollers caused by long, continued use. The commutator bar array is kept free of dirt and/or conductive particles by the blower action created by openings in the rotating roller contacts which move air therethrough by centrifugal force. Alternatively, fan blades on the rotor may be used to create the blower action. If desired, both techniques may be used. The configuration of the commutator array protects adjacent bars against short-circuiting by conductive particles collecting therebetween.
REFERENCES:
patent: 682898 (1901-09-01), Anderson
patent: 2624017 (1952-12-01), Putnocky
patent: 3603823 (1971-09-01), Mason
patent: 3631273 (1971-12-01), Stein
patent: 3670189 (1972-06-01), Monroe
patent: 3819964 (1974-06-01), Noodleman
patent: 3836802 (1974-09-01), Parker
Kollmorgen Corporation
Skudy R.
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