钻井力矩电机新型无位置传感器控制方法-《郑州大学学报(工学版)》

文章信息/Info

Title:: A New Sensorless Control Method Applied to Downhole Drilling Torque Motor

Author(s):: Bai Guochang; Zhang Yuxin; School of Mechanical Engineering, Zhengzhou University, Zhengzhou, Henan, 450001

Keywords:: sensorless; speed-independent; downhole drilling torque motor; low speed; winding flux linkage function

摘要:: 针时目前无位置传感器控制方法受限于电机在零速和低速时反电动势不存在、非常微弱、或是实施困难等特点,基于传统磁链函数法基本原理,屏蔽计算误差和噪声的函数项,得出了简化的磁链函数法.通过软件建模仿真,并搭建基于TMS320F28335控制芯片的硬件实验平台进行实验验证.结果表明,简化的磁链函数法相比传统磁链函数法只使用电机运行时导通相线电压计算换相时刻,减少了计算量、降低了对参数的依赖性,钻井力矩电机在低转速(60r/min)下使用简化的磁链函数法可准确计算换相时刻,实现电机平稳运行.

Abstract:: This paper focused on the sensorless start-up strategy of a torque motor,especially,when a motor was at standstill or very low speed.It was well known that the signal was too small or contains too many noise signals to estimate a precise rotor position.By eliminating the function of error and noise,the simplified flux linkage function method could be obtained based on the traditional winding flux linkage function method principle.The simulation model and the experimental platform based on TMS320F28335 showed that the calculation amount was decreased and the dependence on the parameter was reduced compared with the traditional method.At low speed (60 r/min),the simplified flux function method could be used to ensure the motor running smoothly by calculating the phase change.