作　　者： ; ; ; ; ;

机构地区： 南京航空航天大学

出　　处： 《压电与声光》 2011年第5期749-752,共4页

摘　　要： 为提高压电陶瓷驱动的高压精密微流量阀的频响及微流量输出控制精度,针对压电陶瓷驱动电源不能在断电后将压电陶瓷中的极化电荷迅速释放的缺点,该文在研究压电陶瓷驱动电源的过程中,设计并实现了一种新型快速放电回路,在驱动信号切断后,可快速对压电陶瓷进行放电,使其恢复初始状态,且其放电时间达到毫秒级。在完成快速放电回路特性仿真的基础上,利用所设计的压电陶瓷驱动电源及快速放电回路,对8mm×8mm×20mm、电容为2.3μF的压电陶瓷进行了驱动与快速放电试验测试,结果表明,该电源的快速放电特性,可有效提高压电驱动微流量阀流量的控制精度及流量阀的频率响应特性。 In order to improve the frequency response characteristics and micro-flux output controlling precision of the piezoelectric driving high-pressure and precise micro-flux valve, we researched in detail the piezoelectric ceramic driving power supply （PCDPS） and a novel quickly discharge circuit （QDC） has been designed and implemented to overcome the shortcoming of the piezoelectric ceramic driving power supply （PCDPS） in which the polarization charges cannot be quickly discharged after powering off. The PCDPS can discharge the charges stored in the piezoelectric ceramic quickly and make it get back to the initial status when the driving signals are cut off and the discharging time of the QDC has been up to millisecond level. Based on the simulation of the quickly discharging characteristics of the QDC, the PCDPS with QDC was used to take quickly discharging experimentations on a 8 mm× 8 mm×20 mm piezoelectric ceramic with 2.3μF capacitance. The results showed that the PCDPS had better quickly discharging characteristics, and could efficiently improve the output micro-flux controlling precision and frequency response characteristics of the piezoelectric driving high-pressure and precise micro-flux valve.

关 键 词： 压电陶瓷 电源 精密驱动 放电回路 微流量阀

领　　域： [电气工程] [一般工业技术] [电子电信]