期刊名称：Journal of Modelling and Simulation of Systems
印刷版ISSN：1737-9377
电子版ISSN：1737-9385
出版年度：2010
卷号：1
期号：4
出版社：HyperSciences Publisher
摘要：In the past two decades power semiconductor device technology has seen significant advances, which have changed the world of industrial drives. With the availability of smaller and faster power semiconductor devices and also compact high speed computing processors like Digital Signal Processor (DSPs) has enabled us to implement highly computational intensive control techniques feasible inexpensively. This has led to the widespread use of AC drives using complex control techniques such as Field-Oriented Control (FOC) or direct torque control. The conventional FOC drive requires shaft-mounted speed sensors, which renders them less attractive. These sensors are usually expensive and bulky and also they increase the cost and size of the drive systems. This paper presents a simplified model of ac motor through which stator flux as well as rotor speed can be estimated to implement a sensorless drive. The proposal is based on principle of natural orientation of flux and induced emfs
