Report on energy network model

T41 Developing energy network model for hybrid electric propulsion M610A reduced order model ROM will be developed to describe the hybrid electric drive train including LH2 and fuel cell technologies The system model will be developed using the Pseudo BondGraph Theory based on physical descriptors of energy capacities and fluxes Specific subsystem performance behaviour will be implemented using performance maps The reduced order model will allow modelling rubberband fuel cell stacks and systems compressor humidification system waste heat management and allowing the identification of nonlinear system behaviour as well as unsteady system behaviour The ROM shall be implemented into the SUAVE framework in T42Due to the electromagnetic design of electric drives investigations on the scaled drive behaviour of electric drives are done using FEM calculation methods In particular the machine topology and the associated sensitivities with respect to the total weight of the drive are taken into account The cooling system of the electric machine and power electronics is described with regard to evaluation parameters which show the influence on the type and weight of the cooling structures The precalculations and the modelling are done to determine important design criteria winding setup electromagnetic material mechanical tolerances To fulfil the demands of T42 and T43 uncertainties are identified and represented in the physical system descriptionBatteries and fuels cells need power electronics converters to connect these sources to the HVDC board grid The main load is the propulsion system with the drive consisting in electrical machine and a power electronics inverter Both inverters and converters have to be cooled Losses and power densities of the power electronic devices depend on several factors like cooling temperature HVDC voltage altitude electrical operation points For the optimisation sufficient precise power density and loss models for the power electronics will be derived Uncertainties and nonlinearities can occur due to differences in power electronic circuit topologies in rated voltage of the semiconductors clearance and creepage distances or cooling systems This task will be done completely by TUBS