Method for monitoring the status of bearings of permanently excited synchronous machines and accompanying status monitoring device

摘要

The method involves monitoring condition of bearings (5, 6) of synchronous machines (3, 4) using frequency channel analysis based on information provided in a drive controller of a drive component. The condition monitoring is executed by a function implemented in the drive controller and/or a digital signal processor and/or a converter, and the information is rotary torque component of a stator current calculated from two phase currents and/or a motor-side calculated rotor position and/or a motor speed actual value signal. An independent claim is also included for a device for monitoring condition of a bearing of a permanently excited synchronous machine comprising an evaluation device for determining and evaluating information provided in a drive controller of a drive component.