Rolls-royce Corporation

Rollys-royce Plc

Shantha Dharmasiri Gamini Jayasinghe

Amit Kumar Gupta

Chandana Jayampathi Gajanayake

Sivakumar Nadarajan

Chandana Jayamapathi Gajanayake

Rejeki Simanjorang

Mohamed Halick Mohamed Sathik

Viswanathan Vaiyapuri

A method of monitoring the health of a semiconductor power electronic switch such as an insulated gate bipolar transistor (IGBT) is provided. The method having the steps of: measuring one or more parameters selected from the group consisting of: a rate of change of voltage across the switch; a rate of change of current through the switch, a charge present on a gate of the switch (Q), a peak overshoot voltage (V) across the switch, and a peak overshoot or reverse recovery current (I) through the switch; and estimating the health of the switch based on the measured parameter(s).

Method for estimating power system health

A method of assessing a condition of a multi-phase power system comprises the steps of: acquiring a voltage signal and a current signal for each phase of the multi-phase power system; calculating a product of the voltage signal for each phase of the multi-phase power system with one of the current signals such that the product is between a voltage signal for one phase and a current signal for a different phase for at least two of the products; summing the calculated products; and identifying the possible existence of a fault in the multi-phase power system based on a frequency analysis of the summed calculated products.

Assessment method

A method of open-switch fault detection in a two-level voltage source power converter comprises the steps of:

Open switch fault detection and identification in a two-level voltage source power converter

Growing community of inventors

Singapore, Singapore

Shantha Dharmasiri Gamini Jayasinghe