压电式微滴喷头电源驱动系统设计与实现  

Design and implementation of drive system for piezoelectric droplet sprinkler

作　　者：张威[1] 肖渊[1] 张津瑞[1] 李红英 ZHANG Wei;XIAO Yuan;ZHANG Jinrui;LI Hongying(School of Mechanical and Electrical Engineering,Xi′an Polytechnic University,Xi′an 710048,China)

机构地区：[1]西安工程大学机电工程学院

出　　处：《西安工程大学学报》2019年第3期326-331,共6页Journal of Xi’an Polytechnic University

基　　金：国家自然科学基金面上项目(51475350);西安工程大学研究生创新基金项目(chx2019088)

摘　　要：压电式微滴喷射具有喷射频率高,控制精度高等优点,是一种新型的增材制造技术,压电式喷头驱动电源性能是保证微滴可控喷射的关键。针对压电式微滴喷头需要,设计了一种直流放大式压电陶瓷驱动电源。该电源将STM32微处理器与现场可编程门阵列(field-programmatle gate array,FPGA)相结合,产生高分辨率低压激励信号,经低压运放OPA627和高压运放PA85构成放大电路,对其进行线性放大后输出高压激励信号,实现对压电式微滴喷头的控制。对设计的驱动系统进行输出及带载测试,结果表明,驱动电源可产生上升沿时间0.5~10μs,电压幅值60~270V,频率1~40kHz的脉冲信号;在上升沿时间1.5μs,电平幅值1V,频率5kHz的低压激励信号下,对2.72nF电容进行驱动,其输出波形上升沿时间2.35μs,电压幅值偏差2.3%。Piezoelectric droplet jet technology is an important incremental manufacturing technology,which has the advantages of high injection frequency and accurate control.However,the driving power of piezoelectric drop nozzle is the key to ensure the controllable injection of drop.Given the driving needs of piezoelectric drop nozzle,a piezoelectric ceramic driving power supply is designed.It combines STM32 microprocessor and field programmable gate array(FPGA)to produce high resolution low voltage excitation signal,and low-voltage op-amp OPA627 and high-pressure op-amp PA85 constitute the power amplifier to make it linear amplification,which outputs high-voltage excitation pulse signal to realize the control of piezoelectric micro-drop nozzle.The designed drive system output and load test show that the driving power supply can generate the pulse signal that has the 0.5~10μs of rising-edge,1~40 kHz of frequency,60~270 V of voltage amplitude.Under the low voltage excitation signal with 1.5μs rising edge,frequency 5 kHz and high level amplitude 1 V to drive the 2.72 nF capacitor,it outputs the 2.35μs of rising-edge,and the high-level voltage 2.3%of amplitude deviation.

关 键 词：压电陶瓷 驱动系统 STM32 功率放大 微滴喷头 压电式微滴喷头 

分 类 号：TN784[电子电信—电路与系统]