Eaton Intelligent Power Limited

Stuart John Moody

Chaitanya Bhalwankar

Daniel Peck

Satish Mohanty

Deepak Balaji Somayajula

Ranjith Kumar Sreenilayam Raveendran

Swati Narula

Sravanthi Srikantam

Nirav Mahenra Parmar

Gurmeet Singh

A health signature of each switching device in a control system is estimated using system parameters such as a DC-link voltage, three-phase voltages, three-phase currents, and temperature. The switching devices can be implemented as transistors, and a health signature for each transistor may be an on-state resistance or an on-state voltage of the transistors. For example, the on-state resistance for a metal-oxide-semiconductor field-effect transistor (MOSFET) functions as a health signature. Alternatively, the on-state voltage is used as a health signature for an insulated-gate bipolar transistor (IGBT). Additionally, a junction temperature is estimated for each transistor. Using the estimated health signatures and the junction temperatures, the remaining useful life of each transistor is estimated.

Estimation of life of switching devices

The present disclosure relates to systems and methods for detecting a winding fault and the winding fault severity in a brushless direct current motor before motor failure. Methods for detecting a winding fault include time domain based sequence component analysis, fast Fourier transform analysis, or Hilbert analysis. Methods for detecting the severity of a winding fault include analysis of the standard deviation of real mean squared values determined using motor currents.

Motor winding fault diagnosis

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Portchester, United Kingdom

Stuart John Moody