Rolls-Royce Corporation

Rollys-Royce Plc

Rejeki Simanjorang

Firman Sasongko

Md Shafquat Ullah Khan

Amit Kumar Gupta

Chandana Jayamapathi Gajanayake

Sundararajan Prasanth

Amit K Gupta

Shantha Dharmasiri Gamini Jayasinghe

Chandana J Gajanayake

Mohamed Halick Mohamed Sathik

Mohamed Sathik Mohamed Halick

Mohamed H M Sathik

Electric machine drive systems, and related electric machine embodiments, include technologies for providing redundancy of shaft information of one or more electric machines between converter controllers of the corresponding system. The converter controllers are configured to control operation of power converters, which control one or more electric machines. The disclosed technologies include establishing one or more communication buses between the converter controllers to share the shaft information, which may be based on analog signals from a single, common resolver and/or from different, redundant resolvers depending on the embodiment. For example, in some embodiments, converter controllers communicatively connected to the same resolver may include separate resolver-to-digital converters (RDCs) to provide redundancy of the RDCs.

Technologies for redundant shaft information feedback in electric machine systems having multiple resolvers

Technologies for redundant shaft information feedback in multi-machine drive systems with multiple resolvers

Technologies for redundant shaft information feedback in electric machine systems including a resolver

An operating condition monitor () for monitoring an operating condition of a transistor-based power converter (), comprising: a sensing apparatus () configured to measure a turn-off transient energy of the power converter (), a processor () in communication with the sensing apparatus () to receive the measurement of the turn-off transient energy, the processor being configured to: compare the measurement of the turn-off transient energy to a threshold; and issue an event signal based on the comparison to the threshold meeting a comparison criterion. A method (') of monitoring an operating state of a transistor-based power converter is also disclosed.

Monitoring an operating condition of a transistor-based power converter

A system, method and machine-readable instructions for monitoring a power electronics device. The system involves a semiconductor device, at least one sensor and a processor. The processor is configured to monitor a junction temperature of the semiconductor device by determining from the at least one sensor an on-state resistance of the semiconductor device and calculating the junction temperature of the semiconductor device according to a relationship between the on-state resistance of the semiconductor device and the junction temperature of the semiconductor device. The processor may apply an ageing coefficient to the on-state resistance.

Health monitoring and failure prognosis of power electronics devices

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

Growing community of inventors

Singapore, Singapore

Rejeki Simanjorang