摘要
矿用风机转速闭环控制系统中的速度传感器是精密仪器，在恶劣的环境中长时间工作容易损坏；且速度传感器本身价格昂贵，测速准度受安装精度的影响，维护较困难。为提高转速的估算精度，提出在风机的双闭环控制系统中引入无速度传感器控制技术，研究了基于MRAS的转速估算方法，并应用于斩波串级调速系统中，对整个系统建立了仿真模型。仿真试验表明，改进的控制系统可控制风机在转速为960～1450r／min之间连续可调，并且具有良好的动静态特性，实际转速能够很好地跟随指令转速，误差在土3．13％之内。与带速度传感器控制系统相比，该系统在提高可靠性的同时，还能降低硬件成本。
Speed sensor used in double closed loop speed con- trol system of mine fan was a precision instrument, and it is susceptible to damage due to working in harsh environment for a long time. Moreover, speed sensor was expensive and difficult to maintenance, its accuracy of speed measurement depends on installation precision. In order to improve the ac- curacy of speed estimation, speed-sensorless control technol- ogy was applied to double loop control system of mine fan. MRAS speed estimation method was introduced into the chopper cascade speed regulation system and the entire sys- tem simulation model was built. Simulation results showed that the improved control system can make fan speed contin- uous adjustable between 960~1450 r/rain, and has good dy- namic and static characteristics. The actual speed can follow the instruction speed closely, and the error was controlled within the range of ±3. 13%. Compared with control sys- tem with speed sensor, this novel control system improved the reliability of mine fan and reduced hardware costs at the same time.
出处
《矿业研究与开发》
CAS
北大核心
2013年第5期95-98,共4页
Mining Research and Development
基金
黑龙江省教育厅科学技术研究项目(11541321)
