Patent ID: 9673686
Date: 2017-06-06
CPC Classifications: H02K

Claim:
1. A DC motor, comprising a stator unit ( 5 ) and a rotor unit ( 1 ) which is connected to an electrically conductive shaft ( 3 ) in a rotationally fixed manner, said shaft being rotatably mounted in at least one stationary sintered bearing ( 8 , 9 ), characterized in that a shielding of the rotor unit ( 1 ) is conductively connected to the shaft ( 3 ) in order to connect a conductive shielding, which is formed on the rotor unit ( 1 ), to a defined electrical potential and in that the sintered bearing ( 8 , 9 ) is conductively connected to the potential, so that the shielding of the rotor unit ( 1 ) is capacitively coupled to the potential by means of an at least partially electrically insulating, oil-filled bearing gap which is arranged between the shaft ( 3 ) and the sintered bearing ( 8 , 9 ), wherein current is discharged from the shielding of the rotor unit ( 1 ) to the potential via the at least partially insulating, oil-filled bearing gap.