基于锁相环的液压风扇调速特性测试系统设计  

Design on Testing System of Rotating Speed Regulation Character for a Hydraulic Fan Based on Phase Lock Loop

作　　者：汤春球[1] 莫易敏[1] 

机构地区：[1]武汉理工大学摩擦学研究所,湖北武汉430070

出　　处：《机床与液压》2010年第6期65-66,79,共3页Machine Tool & Hydraulics

摘　　要：为测试液压风扇调速特性,需要对大功率电机进行高精度转速调节控制。介绍风扇调速特性测试系统的设计方案,采用锁相环(Phase Lock Loop)技术实现电机转速的高精度测量,并将转速信号反馈给PLC,通过PLC内置的PID控制算法,控制变频器的输出频率,实现交流电机转速的高精度调节控制,转速控制精度优于1 r/min。To test the rotating speed regulation character of a hydraulic fan, the rotating speed of huge power motor must be regulated accurately. The scheme of testing system of fan rotating speed regulation character was introduced. The technology of phase lock loop was applied to implement high-precision measurement of motor rotating speed. The signal of rotating speed was fed back to the PLC to control the output frequency of transducer though PID control arithmetics inside the PLC. The high-precision rotating speed regulation of the motor was realized and the precision surpassed 1 r/min.

关 键 词：液压马达 锁相环 PID 转速调节 

分 类 号：TP21[自动化与计算机技术—检测技术与自动化装置]