Abstract
This paper deals an electric vehicle with flywheel energy storage system using active magnetic bearings (AMBs) and gimbal. At first the equation of motion of a flywheel energy storage system using active magnetic bearings and gimbal. This equation of motion is a strong nonlinear equation. So, the approximated linear equation of motion is derived and the usefulness of this approximated equation is made sure by experiments and simulation. The spring constant of gimbal mechanism influences the natural frequencies. The best design of gimbal should be extreme low natural frequency of gimbal. Finally, the ideal gimbal design method is proposed.
