A Novel Vehicle-Mounted Magnetic Suspension Flywheel Battery With a Virtual Inertia Spindle

In this article, a novel vehicle-mounted magnetic suspension flywheel battery with a virtual inertia spindle is proposed, which has the advantages of high integration, superior energy storage characteristics, high safety, and stability. Different from the traditional flywheel battery with inertia spindle structure through the motor and flywheel, the novel flywheel battery has no inertia spindle, but has a pillar integrated with the flywheel instead. The pillar does not run through the flywheel, magnetic bearings and motor at all, therefore it does not play the role of supporting the above key components like the traditional inertia spindle, but just for convenient detection and safety protection. Therefore, the existence of the pillar is not the inertia spindle, but just looks like it, so it is called virtual inertia spindle. The unique flywheel structure after optimization can make the energy storage characteristics and the integration of flywheel battery improve obviously. In addition, because of the spherical element, the flywheel supported by the high-integration magnetic bearing has the advantage of not being easily affected by external interference produced by running conditions. To prove the validity of the proposed flywheel battery topology and correctness of theoretical analysis, the stiffness and performance tests are carried out. The experiments results show that the flywheel battery system exhibits superior antiinterference characteristic.