COMMUTATOR ELECTRIC MACHINE WITH LOW LEVEL OF RADIO INTERFERENCE Russian patent published in 1999 - IPC

FIELD: electric machine manufacture. SUBSTANCE: shaft 9 of machine carries commutator, lamellas 1 are anchored in plastic case 8, flat packages are mounted between lamellas 1. Packages are made of three parallel complex strips 2, 3 and 4 of metal foil separated by insulation 5 having high dielectric permittivity and multiply folded in the form of corrugation. One extreme strip 2 of metal foil contacts side surface of lamella 1 with its non-insulated part and another extreme strip 4 of metal foil contacts side surface of another lamella 1 with its non-insulated part, central strip 3 of metal foil contacts upper part of U-shaped metal plate 6 with its non- insulated part. End parts of plate 6 contact shaft 9 of machine. Capacitances formed between each lamella 1 and grounded shaft 9 are uniformly distributed over commutator and facilitate work of leaving edge of brush contact which results in reduced spark formation and energy of electromagnetic radiation and provides for qualitative electromagnetic compatibility of given class of electric machines with radio electron systems of various assignment. EFFECT: invention makes it feasible to lower level of radio interference during operation. 2 dwg