Vector control of unbalanced 3-phase IM using forward and backward components

Authors : Mohammad JANNATI, Nik Rumzi Nik IDRIS

Pages : 1358-1374

View : 11 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In some industries, continuous operation of 3-phase induction motors insert ignore into journalissuearticles values(IMs); even under faults until the scheduled maintenance time is essential. Conventional control techniques such as field-oriented control insert ignore into journalissuearticles values(FOC); cannot be used to control faulty IMs since this will result in significant oscillations in the speed and torque. Consequently, a new control approach must be developed for improving IM performance during fault conditions. This paper presents a method for vector control of 3-phase IMs under open-phase faults. The main advantage of this control scheme is its ability to handle not only one phase but also two phases of open-phase fault conditions. When applying this control technique to a faulty machine, only minor changes to the parameters used in the equations are needed and the conventional FOC algorithm used for healthy 3-phase IMs can still be used. In this paper, simulation and experimental results are presented to study the effectiveness of the proposed technique to control both healthy and faulty 3-phase IMs. The results show that the proposed technique reduces electromagnetic torque pulsations during open-phase fault conditions.
Keywords : Electromagnetic torque pulsations reduction, field oriented control, forward and backward components, open phase fault, 3 phase induction motor, vector control