| 摘要 |
The invention relates to a method and a device for monitoring the temperature of a bearing (1b) of a rotating shaft (2). According to the invention, a resolver (3) is placed in the vicinity of the bearing (1b) and a measuring current (I<SUB>meas</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>meas</SUB>) and by means of an electric voltage drop (U<SUB>meas</SUB>) that is caused by the measuring current (I<SUB>meas</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 (1b) is identified. The invention provides a method and a device for monitoring the temperature of a bearing (1b) of a rotating shaft (2), which do not require a temperature sensor to monitor the temperature. |
