超高温随钻测量系统中的电源技术  

Power Supply Technology in Ultra-High Temperature MWD System

作　　者：樊懿锋 毛为民 艾维平 王飞 FAN Yifeng;MAO Weimin;AI Weiping;WANG Fei(CNPC Engineering Technology R&D Company Limited,Beijing 100206,China;Material and Equipment Branch,China National Logging Corporation,Xi’an,Shaanxi 710054,China)

机构地区：[1]中国石油集团工程技术研究院有限公司,北京100206 [2]中国石油集团测井有限公司物资装备公司,陕西西安710054

出　　处：《测井技术》2024年第2期198-203,共6页Well Logging Technology

基　　金：中国石油天然气集团有限公司直属院所基金项目“200℃大功率井下电路热交换机理与抗高温设计方法”(2021DQ03-24)。

摘　　要：超高温随钻测量仪器要求井下供电电源具备可靠性高、抗高温、体积小等特点,目前国内尚无成熟产品。介绍了一种井下稳压电源模块的设计方案,该电源基于非隔离型直流变换器交错并联BUCK拓扑,以CISSOID公司的CHT-MAGMA高温脉宽调制器作为主控芯片,采用推挽驱动器对脉宽调制(Pulse-Width Modulation,PWM)逻辑电平进行功率放大,再经脉冲变压器实现了功率管隔离驱动,确保两路交错驱动脉冲能够驱动MOS(Metal-Oxide Semiconductor)管可靠导通与截止,实现高效电源变换。结果表明,该电源模块的转换效率在全温度范围内达86%以上,能够较好地满足随钻仪器在井下超高温环境下的供电要求。Ultra-high temperature measuring instrument while drilling requires underground power supply with characteristics such as high reliability,high temperature resistance,and small volume.At present,there are no mature products in China.This paper introduces a design scheme for a downhole stabilized power supply module,which is based on a non-isolated DC converter with interleaved parallel BUCK topology.The power supply uses CISSOID’s CHT-MAGMA high temperature resistant pulse width modulator as the main control chip.The push-pull driver is used to amplify the power of pulse-width modulation logic level,and then the power transistor is isolated and driven by a pulse transformer to ensure that the two interleaved driving pulses can drive the reliable conduction and cutoff of the power MOSFET and realize efficient power conversion.The results show that the conversion efficiency of the power module reaches over 86%in the full temperature range,which can better meet the power supply requirements of drilling instruments in ultra-high temperature environments downhole.

关 键 词：随钻测量 脉宽调制 交错BUCK 补偿网络 隔离驱动 

分 类 号：P631.84[天文地球—地质矿产勘探]