Flywheel Energy Storage System for City Trains to Save Energy

摘要

A prototype of flywheel energy storage system is developed for light rail-trains in cities to store the braking energy. The prototype is designed to have a rotor of 100kg rotating at up to 27000 rpm, which can store 1 kWh energy and supply 10 kW maximum power. Main works and results are described. Difficulties and some key techniques are presented. Test of the system operation is still not finished. Now the system is able to run at 16800rmp. Maximum power output is 3 kWh.