基于储能飞轮的电动汽车制动能量回收

飞轮储能具有绿色无污染的特点,发展潜能巨大。文章以电磁耦合式储能飞轮为研究对象,将其应用于纯电动汽车的制动能量回收,通过整车仿真,分析电磁耦合式储能飞轮的能量回收效率。建立搭载电磁耦合式储能飞轮系统的整车模型,并仿真验证,在初速度为70 km/h时,制动时间为5.853 s,制动距离为70.67 m。分别在不同初始速度和储能飞轮转动惯量条件下进行制动仿真。随着初速度提高,电磁转差离合器作用时间延长,飞轮储存能量增加,但储能飞轮的回收效率相差不大,且能量回收效率均不低于22.4%;转动惯量越大,回收的能量多,回收效率高,但制动时间增加,不利于行车的安全性。由此得出结论:电磁耦合式储能飞轮系统可以有效回收制动产生的能量,选择合适转动惯量的飞轮可以提高制动能量的回收效率。

Braking energy recovery of electromagnetic coupling energy storage flywheel

Flywheel energy storage is green and pollution-free,and its development potential is huge.In this paper,the electromagnetic coupling energy storage flywheel is used as the research object,which applied to the braking energy recovery of pure electric vehicles.The whole vehicle simulation method is used to analyze the energy recovery efficiency of electromagnetic coupling energy storage flywheel.A vehicle model equipped with an electromagnetic coupling energy storage flywheel system is established and verified by simulation.When the initial speed is 70 km/h,the braking time is 5.853 s and the braking distance is 70.67 m.Braking simulations are at different initial speeds and moments of inertia of the energy storage flywheel.As the initial speed increases,the electromagnetic slip clutch acts longer,and the energy stored in the flywheel increases.The recovery efficiency of the energy storage flywheel is not much different,and all the energy recovery efficiency is not less than 22.4%.The greater the moment of inertia,the more energy is recovered and the recovery efficiency is higher,but the braking time correspondingly increases significantly,which is not conducive to driving safety.It concludes that the electromagnetically coupled energy storage flywheel system can effectively recover the energy generated by braking,and selecting a flywheel with a suitable moment of inertia can improve the braking energy recovery efficiency.