发明名称 |
FAULT DETECTION IN INDUCTION MACHINES |
摘要 |
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 including: 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. |
申请公布号 |
US2015260794(A1) |
申请公布日期 |
2015.09.17 |
申请号 |
US201514626026 |
申请日期 |
2015.02.19 |
申请人 |
ROLLS-ROYCE PLC |
发明人 |
ATHIKESSAVAN Subash C.;NADARAJAN Sivakumar;GUPTA Amit Kumar;PANDA Sanjib K. |
分类号 |
G01R31/34;G01R23/02 |
主分类号 |
G01R31/34 |
代理机构 |
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代理人 |
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主权项 |
1. 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; and determining whether the power distribution of at least one of the selected harmonics to its sidebands is below a predetermined threshold; and determining the fault type based on the determination. |
地址 |
London GB |