| 摘要 |
<p>A method for off-line testing of an electric motor, which motor comprises at least one stator winding, and a rotor arranged along a rotation axis is disclosed. The method comprises applying a periodical test signal to the at least one stator winding, collecting first measuring data, related to a physical quantity of the at least one stator winding while the rotor is being rotated about the rotation axis, from one or more waveform periods of the test signal, detecting first peak values of the first measuring data, forming second measuring data based on said first detected peak values, detecting second peak values of said second measuring data for the at least one stator winding, determining a mutual relationship between the at least a portion of said second peak values, providing, if said mutual relationship deviates from a predetermined relationship, a signal indicating a fault in said rotor. The invention further relates to a method for detecting a fault in a stator and apparatus for performing the disclosed methods.</p> |
