Research On Vibration Reduction Of Flywheel Battery For Vehicle

Flywheel battery for vehicle with active magnetic bearing is a kind of efficient energy storage and conversion device. It is characterized by large energy storage density, quick charging speed, long service life, environmental protection and cleanliness. It can also be used for the recycle and reuse of vehicle kinetic energy. However, the movement of vehicle directly affects its stable operation.Structure design of the flywheel and the rotor is carried out according to the system requirements. The internal stress distribution of the composite rim and the metal wheel hub is analyzed. The material strength check of the flywheel rotating at high speed is finished. The interference fit between magnetic bearing ring, electric motor ring, thrust plate and the rotor is calculated. The natural frequencies and vibration modes of the system are also analyzed. By using the ADMAS software, the mechanical model of the flywheel rotor and the equivalent basis is established. The incomplete differential PID and cross feedback controller model is also established through MATLAB software. By using co-simulation, the effects on the dynamic performance of the flywheel rotor system caused by the foundation acceleration, deceleration, turning and climbing, and the uneven road longitudinal vibration and lateral vibration are analyzed. Finally, the incomplete differential PID and cross feedback control program based on TMS320F28335 DSP is programmed. The effect of the cross feedback control strategy on vibration reduction is validated.The results show that, the structure design and material selection of the flywheel rotor can satisfy the strength requirement during conditions of high rotation speed. Motion states of the basis can have significant impacts on the stability of the system with high rotation speed. The designed magnetic bearing can withstand external impact and the rotor unbalance force. The cross feedback control strategy can decrease the bad influences of the gyroscopic coupling on the system. The results present important references for design of flywheel battery for vehicle.