自由活塞式直线发电机起动控制分析

Analysis of free piston engine linear generator starting control

根据自由活塞式直线发电机的工作原理,本文建立了基于矢量控制的永磁直线发电机的数学模型,通过对数学模型的数值分析,获得了系统的起动特性.并进一步分析了直线发电机功率控制的决定因素,研究了电机起动控制时的控制方案,在起动阶段系统采用位置环、电流环、速度环结构进行控制,并确立系统采用矢量控制方法以及空间矢量脉宽调制(SVPWM)控制算法,同时在MATLAB/Simulink中建立了起动阶段的系统仿真模型并进行了系统仿真.其结果证明了该设计方案的可靠性和可行性.

According to the working principle of the free-piston linear generator, the paper established a mathematical model of vector control of permanent magnet linear generator. Based on the mathematical model by numerical analysis, we can obtain the dynamic characteristics of the start system and further analysis of the deterninants of linear generator power control. And we also can study control strategy to control the motor starting, during the start phase system the control structure of position loop, current loop and velocity loop are used, and a system by studying the use of vector control and space vector pulse width modulation （SVPWM） control algorithm are established, and system simulation model are established start-up phase in MATLAB/Simulink and subject to a simulation study. Simulative results verify the reliability and feasibility of the control strategy.