农业机械学报2017，Vol.48Issue(6)：365-372,8.DOI:10.6041/j.issn.1000-1298.2017.06.048
喷油器用超磁致伸缩致动器设计方法和驱动波形研究
Design Method and Driving Voltage Waveform of Giant Magnetostrictive Actuator Used on Electronic Controlled Injector
摘要
Abstract
Combining the output characteristics of giant magnetostrictive material with the driving requirements of an electronic controlled injector,the structure design and driving method of giant magnetostrictive actuator suitable to the injector were proposed.The electronic controlled injector required the displacement in only one direction and the displacement should be shortened at the same time.Then two types of giant magnetostrictive actuators were presented by considering the impact of the bias magnetic field on the actuator's output,and the applicable currents in different bias fields were analyzed.Steadystate displacements and responding time of the two kinds of actuators were measured with the help of an experimental system.And the performance differences of the two actuators,accompanied by the reasons leading to them,were pointed out.As the traditional driving voltage for the giant magnetostrictive actuator,direct voltage in square waveform would cause quite long time in raising the coil current,which occupied most of the whole responding time of the actuator.To save responding time,a fast driving wave was designed with referring the high-voltage opening method used in an electromagnetic actuator.And the output performance of the actuator,strongly biased actuator taken as an example,under designed driving wave was measured and analyzed simultaneously.The results showed that designed driving voltage could reduce the responding time quite effectively from 4 ms to 1 ms.In addition,as the giant magnetostrictive actuator could output continuous displacements from 12 μm to 33 μm,the designed actuator supported more driving effects than the electromagnetic actuator.关键词
超磁致伸缩致动器/喷油器/偏置磁场/驱动电压/性能Key words
giant magnetostrictive actuator/injector/bias magnetic field/driving voltage/performance分类
机械制造引用本文复制引用
薛光明,张培林,何忠波,李冬伟,黄英捷,张磊..喷油器用超磁致伸缩致动器设计方法和驱动波形研究[J].农业机械学报,2017,48(6):365-372,8.基金项目
国家自然科学基金项目(51275525) （51275525）
