Non-Invasive monitoring and diagnosis of electric machines by measuring external flux density
AssigneeGeneral Electric Company
InventorsMadabushi Venkatakrishnama Chari, Sameh Ramadan Salem, Sheppard Salon, O-Mun Kwon
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Abstract
System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one or more points. The one or more measured magnetic field values are compared to one or more corresponding expected values, and a determination of whether a fault is present in the electric machine is made based at least in part on the comparison.
Claims20
A method for monitoring an electric machine, comprising:
- measuring a magnetic field associated with the electric machine at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one or more points;
- comparing the one or more measured magnetic field values to one or more corresponding expected values;
- and
- determining, based at least in part on the comparison, whether a fault is present in the electric machine.
A system for monitoring an electric machine, comprising:
- a plurality of sensors operable to measure a magnetic field associated with the electric machine at a plurality of respective points external to the electric machine;
- and
- a control unit operable to:
- receive the plurality of measurements from the plurality of sensors,
- determine a combined value of the magnetic field based at least in part on the plurality of measurements,
- compare the combined value to one or more expected values of the magnetic field, and
- determine, based at least in part on the comparison, whether a fault is present in the electric machine.
A method for monitoring an electric machine, comprising:
- determining at least one value for a magnetic field associated with the electric machine;
- comparing the at least one determined value to at least one corresponding expected value;
- and
- determining, based at least in part on the comparison, whether a fault is present in the electric machine.
Dependencies are inferred from the claim text.