摘要
基于数学模型的速度估算是异步电机无速度传感器控制的核心。目前,围绕速度估算这个问题,在电机控制领域已出现模型参考自适应、自适应观测器以及扩展卡尔曼滤波等多种方法。无论采用哪种速度估算技术,速度估算系统的动静态性能、低速性能、对参数的敏感性、算法的复杂程度及实现难度都是工程师必须考虑的几个重要性能指标。文中针对低速条件下的异步电机速度估算及控制提出了一种基于无功功率闭环的异步电机无速度传感器矢量控制算法,并探讨了该方法的一些性能指标问题。
In consideration of cost and reliability, sensorless control of asynchronous machine is highly valued by engineers. The core problem of sensorless control is the estimation of speed. It can be realized through MRAS, adaptive observer, EKF, and so on. Steady accuracy, dynamic performance, low speed operation, parameter sensitivity and complexity are both important for speed estimation. This paper proposes a control method based on closed-loop reactive power. This method is suited for sensorless vector control of asynchronous machine at low speed.
出处
《信息技术》
2013年第7期94-97,共4页
Information Technology
关键词
异步电机
无速度传感器矢量控制
速度估算
无功功率闭环
asynchronous motor
sensorless vector control
speed estimation
closed-loop reactive power
