Eaton Intelligent Power Limited

Sravanthi Srikantam

Chaitanya Bhalwankar

Daniel Peck

Stuart John Moody

Satish Mohanty

Deepak Balaji Somayajula

Swati Narula

Ranjith Kumar Sreenilayam Raveendran

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

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Andhra Pradesh, India

Sravanthi Srikantam