| 摘要 |
<p>A method of detecting a fault in an induction machine having one or more windings arranged to draw current at a supply frequency, the method comprising :
performing a process of judging whether a respective sideband of one or more selected harmonics of the supply frequency exists at a predetermined fault frequency in a signal in the one or more windings; and
determining that a fault has occurred if the judgement is positive;
wherein in the judging process each of the selected harmonics of the supply frequency is a harmonic frequency of the supply frequency other than the supply frequency itself.</p> |
