Electromagnetic and Mechanical Modeling of Medium Voltage PMSM for Hybrid Regional Aircraft in Faulty Conditions

This paper presents a comprehensive modeling approach for the propulsion system of a hybrid regional aircraft. The propeller rotation is guaranteed by the turbo engine and the electrical drive in a parallel architecture. The electric drive is coupled to the transmission system through an overrunning clutch, allowing the motor disengagement in the event of a fault or in specific phases during flight. The drive is powered by a 3-level medium voltage Active Neutral Point Clamped (ANPC) converter rated 2400 V. The model focuses on accurately simulating various faults in the drive, including 3-phase, single-phase, switch failures in the power converter, and open circuit faults. The developed model permits to evaluate the impact on the full propulsion system, including maximum transient current and torque, torque undulations, and potential clutch disengagement.