Modeling and Consideration of AMB-Flywheel Supported by Two-axis Gimbals

Abstract

A flywheel energy storage system using an active magnetic bearing (AMB) is an effective method for storing electric power and reducing energy consumption. The stabilization of a flywheel rotor system supported by magnetic bearings fixed on the ground has been done. Currently, an electrical vehicle with a flywheel energy storage system using a magnetic bearing and a two-degree-of freedom gimbal which means two-axis gimbal have been carrying out. In this paper, the mathematical model for both the flywheel and the gimbals has been derived. Also, a discussion of the gimbal design is presented. It was verified through experiments that the proposed model in this paper is very effective.

Inertial load effects on a single axis gimbal flywheel with magnetic bearings

“…The generalized coordinates for Lagrange equation are If the gimbal damping G c and stiffness G k values are added and the last two equations are rearranged, the equations of motion becomes [5] ( ) (20), an H ∞ controller will be designed. Note that ω is taken zero in the controller design.…”

A Study on AMB Flywheel Powered Electric Vehicle

“…Radial AMB means the AMB used for controlling the radial directions, and Axial AMB means the AMB controlling the axial direction. By gimbal (6) , the flywheel system has more two degree of freedoms, one is the angle about the longitudinal direction and the other is the angle perpendicular to the above angle. In current research we are using homopolar type of AMB (7) , replacing the old heteropolar one.…”

Development of Lorentz Force Type Magnetic Bearing

“…Hence, clean and high efficiency energy storage system is demanded. An energy storage flywheel is expected one of the most efficient and clean methods [1]- [5]. A flywheel is accelerated by a motor with surplus power when the power is generated by renewable source and store the energy as its rotational kinetic energy.…”