核磁共振测井仪脉冲功率放大电路设计与实现  

Design and realization of pulsed power amplification circuit applied in nuclear magnetic resonance logging tool

作　　者：孔力[1] 李韩文[1] 王瑞清 

机构地区：[1]华中科技大学控制系 [2]中国石油测井集团有限公司技术中心

出　　处：《石油机械》2007年第6期17-20,0-1,共4页China Petroleum Machinery

基　　金：湖北省自然科学基金资助项目(2006ABA072)的部分研究成果

摘　　要：提出一种实用可靠的适用于核磁共振测井系统脉冲功率放大电路的设计方案。通过理论计算,讨论了全桥开关放大电路能满足核磁共振测井系统对输出功率的要求;给出高速功率MOSFET驱动电路的特性分析及设计方案,并详细阐述了驱动电路各模块的功能。实验证明该电路在1MHz频率下是一种高效、稳定的脉冲激励放大能量转换电路,已投入实际应用中。A practicable and reliable design scheme applied in NMR (nuclear magnetic resonance) logging tool is proposed. The full-bridge switch amplification circuit can meet the requirement of the NMR logging tool for output power through theoretical calculation. The characteristic analysis and design scheme of drive circuit for MOSFET are provided and the function of every module of the drive circuit is elaborated. The circuit is proved to be an efficient and reliable pulsed stimulation amplification circuit for transforming energy at the frequency of 1 MHz by a great deal of experiments and has been put into actual application.

关 键 词：核磁共振测井仪 全桥开关放大电路 高速MOSFET驱动 

分 类 号：TN95[电子电信—信号与信息处理]