| 摘要 |
A method is disclosed for locating a speed sensitive ground condition (38) in a field winding of an electromagnetic synchronous machine having a rotor and an excitation circuit (48), said method including: sensing a magnetic flux (30) generated by the field winding, while accelerating the rotor (43) and activating the excitation circuit; detecting a cyclical aberration (46) in the magnetic flux occurring during revolution of the rotor, and determining a position in the field winding (50) corresponding to the cyclical aberration and identifying that position as a location of the speed sensitive ground condition.
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