FIELD: life and debugging tests of traction motor brushes under conditions approaching service ones. SUBSTANCE: proposed test facility has commutator simulator 1 driven by motor 11 with tachometer generator 13 and load-current generator 6; in addition, it is provided with vibration exciter 14-15 whose control unit is connected to output of tachometer generator 13; output of the latter is also connected through amplifier to counter-field winding 9 of generator 6. EFFECT: improved design. 5 dwg
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