轴流式血泵无位置传感驱动控制系统设计  

Design of sensorless drive control system for axial flow blood pump

作　　者：巫伟强 谭建平[1] 王帅[1] 喻哲钦 肖智勇 WUWeiqiang;TAN Jianping;WANG Shuai;YU Zheqin;XIAO Zhiyong(College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《中国医学物理学杂志》2019年第1期77-80,共4页Chinese Journal of Medical Physics

基　　金：国家自然科学基金(51475477;31670999)

摘　　要：目的:设计一种无位置传感器轴流式血泵驱动控制系统,实现轴流式血泵的速度闭环控制、无线状态监测及动态调节控制。方法:以STM32F103作为主控芯片,设计六臂全桥驱动电路,采用端电压过零检测实现转子位置和速度检测,并设计PI控制器实现闭环控制,使用无线蓝牙通讯实现泵状态监测及控制。结果:驱动控制系统速度响应快,稳态误差小于1%,在8 000 rpm转速下,能够达到人体血液循环所需的流量及压差要求。结论:系统实现了轴流式血泵无位置传感的启动及速度闭环控制,通过蓝牙模块实现对泵运行过程的电压、电流及流量进行监控和运行过程中根据病人生理情况动态调节泵转速。Objective To design a sensorless drive control system for realizing the closed-loop speed control,wireless monitoring and dynamic regulation of axial flow blood pump.Methods With STM32F103 as the main control chip,a 6-arm full-bridge drive circuit was designed.The rotor position and speed were obtained by zero-crossing detection.Moreover,a PI controller was designed to realize the closed-loop control,and the monitoring and control of the blood pump are realized by wireless Bluetooth communication.Results The drive control system had a fast response speed and its steady error was less than 1%.At rotate speed of 8 000 rpm,the designed system met the requirements of flow and differential pressure of human blood circulation.Conclusion The designed system realizes the sensorless startup and speed closed-loop control of axial flow blood pump.Through the Bluetooth module,the voltage,current and flow of the pump are monitored.During system running,the pump speed is dynamically adjusted according to the physiological condition of patients.

关 键 词：血泵 心血管疾病 无位置传感器 蓝牙 系统设计 

分 类 号：R318[医药卫生—生物医学工程] TH789[医药卫生—基础医学]