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矿井提升机直流调速系统多为电流和速度双闭环调节,调速性能优良,安全可靠,但当负载转矩(提升张力差)较小时,通过直流电动机电枢的电流较小,电动机工作在断续区,机械特性疲软,导致调速系统的不稳定甚至振荡。参考交流变频的直接转矩控制技术并将其应用到直流调速系统中,对电动机的电枢电流和磁场电流进行协调控制,可避免电动机
Mine hoist DC speed control system for the current and speed of double closed-loop regulation, speed performance, safe and reliable, but when the load torque (to enhance the tension difference) is small, through the DC motor armature current is small, the motor work in Intermittent area, weak mechanical properties, leading to instability and even speed control system oscillation. Reference to the AC variable frequency direct torque control technology and its application to the DC speed control system, the motor armature current and magnetic field current coordinated control to avoid the motor