A Standard Mission Profile for Hybrid-Electric Regional Aircraft based on Web Flight Data

To reduce emissions of air traffic, future aircraft will install hybrid-electric propulsion systems. We require the load conditions over the time in service, to design these aircraft. In this paper, we propose a mission profile for a regional aircraft with a hybrid-electric propulsion system. We focused on regional aircraft, which are in service in Ireland and the United Kingdom (UK). The reference aircraft ATR\,72-600 is a turboprop aircraft with a capacity of 70 passengers. To propose a mission profile, we have analyzed more than 6000 flights of four different aircraft of the same type. Input data is provided by online databases, which collect flight data. We are able to show that the maximum available power is needed for about 52 seconds during take-off and climb phase of the flight. The median flight time is 59 minutes and 30 seconds. The average required power is 53\,\% of the maximum power. The average traveled distance is 407\,km, which is less than one third of the aircraft\u27s maximum reach. These findings are needed for calculating the lifetime of drivetrain components of a hybrid or all electric aircraft. In our further work, we will design an electric machine for regional aircraft. This mission profile will be used to design different power train components

Iron Loss and Parameter Measurement of Permanent Magnet Synchronous Machines

In this paper a measurement technique for synchronous machines is presented that allows the experimental identification of stator flux linkage as well as iron and friction losses in each operation point. The technique can be applied to all kinds of synchronous electric machines, even to machines showing magnetic anisotropy, iron saturation and cross-coupling. Influences of spatial harmonics, inverter switching and temperature transients are considered. The method uses steady-state measurements at constant motor speed. It is based on a combined evaluation of two operation points with corresponding magnetic states, one being in the motor and the other in the generator mode. The method is demonstrated by characterization of an automotive permanent magnet synchronous traction motor

Modelling of High Torque Density Switched Reluctance Motors with Mutual Coupling

In this paper a method is introduced which models the resulting motor torque and current dynamics directly from the flux linkages. With the introduced method to process the flux linkage characteristics it is sufficient to calculate half of an electrical period to receive all information for modelling the system’s behaviour, even for both long and short flux path mutual coupling. The model is validated by 2D finit