Indian Institute of Technology Hyderabad (IITH) is a premier institute of science and technology established in 2008. IITH has been consistently ranked in the&nbsp;<a href="https://iith.ac.in/reports/" rel="noopener noreferrer">top 10 institutes</a>&nbsp;in India for Engineering&nbsp;<a href="https://www.nirfindia.org/2021/EngineeringRanking.html" rel="noopener noreferrer" target="_blank">according to NIRF</a>&nbsp;making it one of the most coveted schools for science and technology in the country.

IITH offers&nbsp;<a href="https://iith.ac.in/academics/under-graduate/">undergraduate programs</a>&nbsp;in all the classical engineering disciplines, applied sciences, design, as well as several modern interdisciplinary areas. Students are given a flexibility to explore a broad set of areas, and potentially pursue a minor or double major in a discipline that is not their own. Students who wish to seek a deeper understanding of their own discipline are strongly encouraged to get involved in cutting-edge research with the help of a faculty to mentor them, and earn an Honors in their own field.

The very foundation of IIT Hyderabad is based on&nbsp;<a href="https://iith.ac.in/research/">research and innovation</a>. The vibrant research culture is evident from the number of patents and publications that IITH produces consistently every year. IITH offers&nbsp;<a href="https://iith.ac.in/academics/programmes-offered/">graduate programs</a>&nbsp;at both a masters, and a doctoral level, in several diverse areas. There are separate programs for technology, design, science, and liberal arts. The&nbsp;<a href="https://iith.ac.in/academics/post-graduate/">MTech program</a>&nbsp;is offered in various modes and durations to cater to the ever-growing need of postgraduate level professionals in the country.

IITH encourages and supports&nbsp;<a href="https://iic-iith.netlify.app/index.html" rel="noopener noreferrer" target="_blank">innovation and entrepreneurship</a>&nbsp;at every stage. The minor program in entrepreneurship is open to all students of IITH, and many of the courses are offered by industrialists who are entrepreneurs themselves. There are various&nbsp;<a href="https://iith.ac.in/research/centres-incubators/">innovation centers and incubators</a>&nbsp;that promote entrepreneurship and help mentor young innovators. IITH has been very successful in building tie-ups with leading academic institutions around the globe.

IITH enjoys a very special relationship with Japanese universities and industries that goes beyond academic and research collaborations. In fact, some of the iconic buildings in IITH campus will carry the signature of Japanese architecture.

IITH creates a unique holistic ecosystem for education that offers interactive learning, a very flexible academic structure, cutting-edge research, strong industry collaboration, and entrepreneurship. This is an environment which enables students and faculty to translate their dreams into realities.

IIT Hyderabad

In the present scenario, high power industrial drive applications mostly employ Voltage Source Inverter (VSI) fed induction motors. In the very high power ranges (>10 MW), Load Commutated Inverter (LCI) fed synchronous motors are also used. Economy and efficiency are crucial factors for drives in such high power applications. Recently, a new hybrid drive topology using a specially designed dual stator winding induction machine fed from an LCI and a VSI has been proposed. The machine has been named as the Active-Reactive Induction Machine (ARIM). The use of a thyristor-based LCI to handle all the active power, is expected to make the ARIM drive a much more efficient and economic option than the VSI based drives. This paper presents a quantitative evaluation of the efficiency and economic benefits of the ARIM topology employed in a 1 MW drive application, as compared to three other popular drive topologies used in this power range. These are: (a) A low voltage VSI based drive, (b) A medium voltage two level VSI based drive, and (c) A medium voltage three level VSI fed drive. The losses and efficiency in each case are compared by simulation studies using MATLABIPLECS. Further, an estimate of the approximate costs of the drive topologies is made to compare their economic benefits. It is found that the ARIM drive has major benefits in cost and efficiency, when compared to other conventional drives. ©2016 IEEE.

Department of Electrical Engineering

World University root node

IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2016

A quantitative evaluation of the efficiency and economic benefits of the active-reactive induction machine drive in high power applications

The ability of an electrical drive to continue operation without tripping in spite of short duration voltage sags or power supply interruptions is known as Power Failure Ridethrough capability. Critical production processes in industries require the drives to smoothly ride-through during momentary power interruptions. The reliability of the drive is dependent on the maximum duration for which a total power supply failure can be tolerated without process interruption. This paper presents a method to extend the duration of the ride-through in voltage source inverter fed vector controlled induction motor drives with a front end diode bridge rectifier. The proposed method minimises the losses in the system during the ridethrough, thereby enabling a longer ride-through duration. The method only requires a modification of the control software and hence is easy to implement. The paper also briefly describes two conventional methods used for ride-through, and compares the proposed method with the conventional methods to clearly bring out its advantage. Simulation study using MATLAB/PLECS verifies the effectiveness of the proposed method. Hardware implementation of the method on a 30 kW induction machine indicates an extension of up to 34% in the ride-through duration with the proposed method, as compared to the conventional method. © 2015 IEEE.

IEEE Transactions on Industry Applications

An improved scheme for extended power loss ride-through in a voltage source inverter fed vector controlled induction motor drive using a loss minimisation technique

Critical production processes in industry require the drives to smoothly ride-through during momentary power interruptions. This paper presents a method to extend the duration of the ride-through for VSI-fed vector controlled induction motor drives with a front end diode bridge rectifier. The proposed method minimises the losses in the system during the ride-through thereby enabling a longer ride-through duration. It requires only modification of the control software and hence is easy to implement. Hardware implementation of the method on a 30 kW induction machine indicates an extension of upto 34 % in the ride-through time by minimising the losses. © 2014 IEEE.