期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：5
页码：8581
DOI：10.15680/IJIRSET.2016.0505280
出版社：S&S Publications
摘要：The demand for the control of electric power for electric motor drive system and industrial controlexisted for many years. The Variable-speed drives are created when a motor is combined with a power electronicsconverter. By introducing variable speed to the driven load, it is possible for the optimization of efficiency of the entiresystem and results in greatest efficiency gains. This paper presents the need of Speed monitoring and speed Control inAC Motors. AC motor drives are widely used in control applications such as the speed of pump speeds, conveyorsystems, , machine tool speeds, and other applications that require variable speed. Out of the various methods ofcontrolling Induction motors, V/f Control has proven to be the most versatile and precise method. In this, PWMInverters have been modeled and their output is fed to the Induction Motor drives. A LabVIEW code was developed tosuccessfully implement Closed-Loop V/F Control on a PWM-Inverter fed to a 3-phase Induction Motor and the Torquewas found to be constant for various rotor speeds. It was observed that using a Closed-Loop scheme with a PIDController gave a very superior way to control the speed of an Induction motor by maintaining a constant maximumtorque. This method falls under the category of VVVF drives, which is based on Sinusoidal pulse width modulation(SPWM). SPWM plays an important role in the minimization of switching power losses and lower order harmonics inthe power converters used in controllers.
