新型恒电位仪的设计与实现  

The Design and Realization of Novel Potentiostat

作　　者：袁佑新[1] 刘洋[1] 奉潜江[2] 苏杰磊[1] 

机构地区：[1]武汉理工大学自动化学院,武汉430070 [2]湖北省建筑材料工业研究设计院,武汉430071

出　　处：《武汉理工大学学报》2004年第10期67-69,共3页Journal of Wuhan University of Technology

基　　金：湖北省科技攻关项目 (2 0 0 1AA10 1C2 3)

摘　　要：为了防止金属腐蚀 ,研制新型恒电位仪来实现对金属外加电流的阴极保护。运用电力开关变换技术和高频开关技术 ,以 VMOSFET作为功率开关器件 ,构成半桥式开关变换器 ;采用脉宽调制 (PWM)技术 ,PWM信号由控制器SG35 2 5 A产生 ,从输出实时采样电压反馈信号 ,以控制输出电压的变化。并且从实践的角度提出了一种新型恒电位仪的设计和实现方法 ,该恒电位仪系统经实际运行表明 ,系统具有高稳定性。In order to prevent metal from corrosion, a kind of novel potentiostat is designed, which realizes technology of cathodic protection to the metal. The converter technique of ETOP and the high frequency switching technique are used .The buck half-bridge convertor made of VMOSFET and theory of PWM are used. The signal of PWM is offered by the controller SG3525A, the feedback voltage achieved from output is used to control the change of out-voltage. From the point of practice, this text presented the design method of the novel potentiostat. The run and the test results showed that the potentiostat system designed by this method have the excellent characters of high stability, high security and low ripple wave of output-voltage.

关 键 词：恒电位仪 高频 PWM 变换器 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]