%0 Journal Article %T Structure and Control of Flywheel Energy Converter %A Yiming He %A Xianyi Qian %J International Journal of Wireless and Microwave Technologies %D 2011 %I MECS Publisher %R 10.5815/ijwmt.2011.01.06 %X On the basis of the flywheel energy converter¡¯s structure in wind power turbine, we have used permanent-magnet synchronism motor as energy converter and built mathematical model. We have studied and realized control method of wind power turbine¡¯s constant output power. By analyzing the mathematical model, we have concluded that the needed time of stored energy is three times longer than constant torque control time, and the needed motor power is one second of constant torque control. When flywheel starts from zero speed to basic speed ([(¦Ø_max)/5]), the constant torque control method will be acquired. When flywheel speeds up between [(¦Ø_max)/5] and ¦Ø_max , the amplitude power control will be acquired. What we have studied is very important to realize constant output power. %K Converter %K Permanent-magnet Motor %K Mathematical Model %K Control Method %U http://www.mecs-press.org/ijwmt/ijwmt-v1-n1/v1n1-6.html