磁悬浮飞轮储能补偿脉冲发电机技术研究

Research on Magnetic Suspension Flywheel Energy Storage Compensated Pulsed Alternator

介绍了一套基于磁悬浮飞轮储能的脉冲电源系统。电机主体为一台两相、四级、空心补偿脉冲发电机。轴向使用电磁推力轴承,径向使用内转子外定子混合磁轴承,具备承受4g过载能力。使用有限元软件对系统电磁特性进行了仿真。采用自励磁方式,在20 000r/min的初始转速下,励磁电流可在9ms内增至9kA,转子转速降为18 440r/min。对电感梯度1μH/m,电阻梯度0.005mΩ/m的电磁轨道炮负载放电,可将5g弹丸加速至1.98km/s,峰值电流可达180kA。

A set of pulsed power system based on maglev flywheel energy storage is introduced in this paper,which is a two-phase four-pole air-core compensated pulsed alternator.The electromagnetic thrust bearing is used in the axial direction.In the radial direction,an inner rotor outer stator hybrid magnetic bearing is adopted with the ability to withstand4g overload.The electromagnetic properties of the system are simulated by using a finite element software.Using a self-excitation method,the field current can increase to9kA within9ms,at the initial rotor speed of20000r/min.As a consequence,the rotor speed is decrease to18400r/min.When driving an electromagnetic track gun whose inductance gradient and resistance gradient are1μH/m and0.5mΩ/m,respectively,the peak current can reach to180kA,accelerating a5g projectile to1.98km/s.