All eletric propulsion system model based on a levitated flywheel machine

Flywheel systems are attractive in hybrid and electric vehicles due to their ability to handle power during acceleration and braking. The combination of a flywheel device with a battery source has several advantages such as high peak power capacity, high energy density and reduction of the number of charge/discharge cycles of the battery. The novelty of the system in development at the Uppsala University is the use of a high-speed flywheel machine prototype as a kinetic energy storage system. The prototype is a double wound three-phase permanent magnetic synchronous machine, levitated axially with four units of Halbach arrays in a repulsive configuration. This paper presents the simulation of the proposed driveline configuration: a series connection of the battery, flywheel and vehicle motor. Power converters are needed to handle the power flow in the driveline and the adjustment of the control system is one of the studies of the present work. This work presents a small-scale simulation, validating the possibility of use of the machine in real vehicular applications.