• M. R. L. Manaswini
• G.V.Siva Krishna Rao

Induction motors are playing a vital role in many of the industrial and domestic applications because of their inherent superior characteristics. For induction motor’s variable speed applications, variable voltage and variable frequency(V/f) speed control is generally used because of the smooth and wide-range of speed control it provides. In conventional speed control, a two- or three-level VSI is used which produces voltage with high harmonic distortion and hence, a pulsating torque is produced and life of motor decreases. The recent advances in Power Electronics field led to the development of Multilevel Inverters (MLI) which have the capability of producing voltages with reduced harmonics and with increased efficiency and power handling capability. This work is aimed at employing a Sixty-three level Multilevel Inverter in the closed loop Volts/Hertz speed control thereby overcoming the disadvantages encountered with conventional method. A closed-loop induction motor speed control model using Volts/Hertz method and PID controller as speed controller is presented in this work. The main objective is to enumerate the advantages of PID controller which are: economical, wider range of operating conditions, easier to adapt etc., thereby investigating its suitability as a speed controller for induction motor. The performance of the PID controller is observed by developing the model in MATLAB/SIMULINK.

Multilevel Inverter, PID Controller, Induction Motor, Volts per Hertz Control

"Volts per Hertz Speed Control of 63-Level Multilevel Inverter Fed Induction Motor Using PID Controller", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 9, page no.f22-f31, September-2023, Available :http://www.jetir.org/papers/JETIR2309503.pdf

"Volts per Hertz Speed Control of 63-Level Multilevel Inverter Fed Induction Motor Using PID Controller", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 9, page no. ppf22-f31, September-2023, Available at : http://www.jetir.org/papers/JETIR2309503.pdf