CAJ | 학술논문

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.
침대전통무위치공제기술재저속구소존재적수렴성차、관측정도저등문제,진행료방안대비연구:채용고빈주입식적무위치공제기술구유불의뢰전궤삼수、가이결합시량공제기술실현고성능조속적우점,단존재수요실현교위복잡적려파기래진행신호변식,동시소주입적고빈신호회인기일정진동화조성등문제.여차상비,제출일충신형적개배식무위치공제기술,기원리간단、불수요복잡적공제산법、불의뢰전궤삼수이급철겁효응,병실현부재전구적자괄응조절.결점시부재돌변시존재전속진탕문제.인차,저속구방안적합리선택,수요의거공제계통적저속성능요구이급계통성본.
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.