超磁致伸缩微振动电驱系统设计与实现

摘要

To realize the precise control of the micro-vibration of the giant magnetostrictive actuators, a high power program controlled electric driving system, including constant current driving circuit and power supply circuit, is designed. Firstly, the principle and the control structure of the electric driving system used in the circuit are studied. Then, the specific design of the circuit and the selection of components are described in detail. Besides, the topological structure and the specific circuit design of the power supply for the drive circuit are introduced. The experimental result shows that the linearity degree of the input voltage vs. the output current of the high power constant-current driving circuit is 0.105%;the time drift of the output current is 3 mA/h;and the frequency is up to 500 Hz. The 1 Hz and 5 Hz sinusoidal output is realized for the giant magnetostrictive actuator. Thus, the requirements of high precision and stability of the output micro-vibration of the giant magnetostrictive actuators are satisfied.%为了实现对超磁致伸缩驱动器的微振动进行实时精密控制,设计大功率程控电驱系统,包括恒流驱动电路和供电电路.首先,对该恒流驱动电路所采用的连续调整型恒流源的原理进行研究.接着阐述该电路的具体设计以及元器件的选型.然后,详细介绍该恒流驱动电路的供电电路所采用的拓扑结构以及具体设计.实验结果表明:该大功率程控电驱系统输入的小电压信号与输出大电流信号的线性度为0.105%,时漂为3 mA/h,频率可达500 Hz,并且驱动超磁致伸缩驱动器实现1 Hz和5 Hz的正弦输出,基本满足了驱动超磁致伸缩微振动的高精度、高稳定性、高集成度的要求.