Communication and energy management system of small electric airplane

The paper deals with internal communication system in experimental fully electric airplane VUT 051 RAY which is controlling the whole drivetrain system. The complex drivetrain system consist of battery blocks, main computer, control system of the traction inverter, control and monitoring panel, several simple control and monitoring devices placed on pilot board and finally control system of fast charger. Communication interface is realized with CAN network with parallel analog backup structure. All operating conditions are indicated on Onboard monitoring Panel. Significant part of the data structure of the airplane is implemented data logger which is restoring all system events on all communications links. These data can be used for deep analysis of the parameters of energy flows in the airplane drivetrain. The occurred errors and nonstandard drivetrain states are saved too. Finally, the state of charge estimation is discussed.