摘要
针对传统无位置控制技术在低速区所存在的收敛性差、观测精度低等问题,进行了方案对比研究:采用高频注入式的无位置控制技术具有不依赖电机参数、可以结合矢量控制技术实现高性能调速的优点,但存在需要实现较为复杂的滤波器来进行信号辨识,同时所注入的高频信号会引起一定振动和噪声等问题。与此相比,提出一种新型的开环式无位置控制技术,其原理简单、不需要复杂的控制算法、不依赖电机参数以及凸极效应,并实现负载转矩的自适应调节。缺点是负载突变时存在转速振荡问题。因此,低速区方案的合理选择,需要依据控制系统的低速性能要求以及系统成本。
The comparative research on the problems of bad performance of convergence and low accuracy of sensorless control in standstill and near-zero speed region was carried on.Although, sensorless control with high fre- quency signal injection （HFSI） can be independent of parameters of motors and achieve high performance speed con- trol with vector control scheme, it depends on some complicated digital filters to achieve signal identification and also the high frequency signals injected in motors can arouse boring vibration and acoustic noise. In contrast, a novel open- loop sensorless control scheme was proposed with the advantages of simple structure, without complicated filters, inde- pendent of parameters and salient effect and can also achieve self-regulation according to the load conditions. The disadvantage of open-loop control is the problem of speed oscillation with large transient load. For this reason,the selection of control scheme in near-zero speed region needs to be based on the consideration of performance require- ment and cost of control system.
出处
《电气传动》
北大核心
2013年第1期12-16,共5页
Electric Drive
关键词
无位置传感器控制
低速区
高频注入
数字滤波器
开环
sensorless control
near-zero speed region
high frequency injection
digital filters
open-loop
