ABSTRACT
A high level draft technical specification was provided by Turbomeca as the basis for the design of the high temperature electronics platform. The design concept was to take the output from several on-engine sensors (temperature probe, thermocouple, strain gauges, frequency), carry out the signal conditioning on the sensor signals, multiplexing, analogue to digital conversion and transmission of the data through a serial data bus. High temperature silicon capacitors produced by Ipdia – France became available during the course of the project and development SiC transient voltage suppressors, which have potential for operation above 150°C were evaluated. In addition to the hybrid circuit a high temperature printed circuit board containing resistors required for the frequency sensors was designed and manufactured. The hybrid circuit sealed in a hermetic Kovar package and the high temperature printed circuit board (containing resistors) is mounted into the stainless steel enclosure.
