Next-generation intelligent power converters for electric aircraft Existent power modules relying on silicon electronics do not allow for drastic weight and volume reductions as more-electric aircraft (MEA) call for. An EU initiative sought to gain a better view of the design criteria of tomorrow's converters through a technical feasibility study. Digital Economy Transport and Mobility Climate Change and Environment Industrial Technologies © pavlemarjanovic, Thinkstock Silicon carbide (SiC) is a next-generation material expected to significantly reduce power loss in power semiconductor devices such as junction-gate and metal-oxide semiconductor field-effect transistors. Power modules that use SiC power semiconductors enable achieving higher power densities, voltages, temperatures and frequencies, while reducing heat dissipation. Eliminating the need for cooling equipment, SiC shows great promise for lighter electronic components compared to conventional silicon semiconductor technology. The EU-funded HYPOTHESIS (Feasibility study of intelligent high integrated power electronic module (HIPEM) for aeronautic application) project performed a feasibility study of intelligent integrated electric modules that have high power, ensuring they meet MEA requirements. These modules are a core block on which the design of next-generation electronic converter components will be built. Project partners specified, designed, manufactured and tested an intelligent power module (IPM), including both the power devices and the isolated gate driver. It meets MEA requirements in developing smaller and lighter power converters. The IPM prototype is based on the use of advanced materials for high-temperature operation and utmost reliability. Project outcomes will support the adoption of new SiC devices in aerospace applications, particularly for power generation and electromechanical actuators. New SiC transistors will enable smaller and lighter power converters for MEA, while helping to reduce fuel consumption and maintenance costs. Results will also help to increase the reliability of power modules operating in harsh power cycling and high-temperature environments thanks to the use and validation of new materials for baseplates, substrates, die attach, gels and plastic. The advent of MEA and ultimately all-electric aircraft places high demands in terms of weight and volume reductions. IPMs have great potential to reduce the aviation industry's carbon footprint. Keywords Power converters, electric aircraft, silicon carbide, HYPOTHESIS, intelligent power module
