| 摘要 |
The invention relates to a method and a device for monitoring the temperature of a bearing ( 1 b) of a rotating shaft ( 2 ). According to the invention, a resolver ( 3 ) is placed in the vicinity of the bearing ( 1 b) and a measuring current (I<SUB>mess</SUB>) is applied to the stator winding ( 4 ) of said resolver ( 3 ). A total ohmic resistance (RG), composed of the ohmic resistance of the stator winding ( 4 ) and the ohmic resistance (R<SUB>L</SUB>) of the electric supply lines ( 13 ) to the stator winding ( 4 ), is determined by means of the measuring current (I<SUB>mess</SUB>) and by means of an electric voltage drop (U<SUB>mess</SUB>) that is caused by the measuring current (I<SUB>mess</SUB>) through the stator winding ( 4 ) and the supply lines ( 13 ). If the total ohmic resistance (R<SUB>G</SUB>) and/or the temperature (T) of the resolver ( 3 ) that has been determined from the total ohmic resistance (R<SUB>G</SUB>) exceeds a threshold value, an excess temperature of the bearing ( 1 b) is identified. The invention provides a method and a device for monitoring the temperature of a bearing ( 1 b) of a rotating shaft ( 2 ), which do not require a temperature sensor to monitor the temperature.
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