作　　者： ; ; ; ;

机构地区： 南京航空航天大学

出　　处： 《压电与声光》 2011年第6期935-938,共4页

摘　　要： 研究了一种低纹波输出的压电陶瓷驱动电源,实现对压电驱动微流量阀的输出微流量的控制。利用单片机控制数字频率合成芯片来产生各种函数信号,研究了高低压稳压电路、小信号放大处理及功率放大电路,控制信号经滤波、放大及稳压等处理后,函数信号形成高压输出,驱动压电陶瓷,对微流量阀阀芯位移进行驱动,从而实现对微流量阀输出微流量的精密控制。通过对该电源输出特性的试验研究,结果表明,该电源具有良好的输入输出线性特性及低纹波特性,其线性度拟合相对误差仅为84mV,高压输出纹波电压低于10mV,这对提高微流量阀输出微流量的控制精度具有重要意义。 A piezoelectric ceramic driving power supply with a small ripple wave output has been carried out in this paper.The control of the output micro flux of the piezoelectric driving micro-flux valve has been realized.A micro-computer unit（MCU） was used to control the direct digital frequency-synthesizer（DDS） to generate different types of function signals.The low-voltage and high-voltage stablizing circuit,small signal amplifying circuit and the power amplifying circuit have been especially reserached.After the control signals were processed by filtering,amplifying and voltage stabilizing,the function signal would be amplified to the high-voltage to drive the piezoelectric ceramics and control the spool displacement of the micro-flux valve,and then to realize precise control of the micro-flux of the valve.After experimenting on the output features of the power supply,the results proved the power supply output signal had excellent input-output linearly characteristics and small ripple wave characteristics.The fitting relative linear error is only 84 mV and the high-voltage output ripple wave error is less than 10 mV,which is very important to improve the micro-flux output precision of the piezoelectric micro-flux valve.

关 键 词： 压电陶瓷 精密驱动 微流量阀 直接数字频率合成 集成芯片

领　　域： [电气工程] [一般工业技术] [电子电信]