Dr.J Srinivas Rao
@anurag.ac.in
Research Associate
Anurag Engineering College
RESEARCH, TEACHING, or OTHER INTERESTS
Electrical and Electronic Engineering, Electrical and Electronic Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Suresh Kumar Tummala, Sameera Shaik, D. Srinivasa Rao, Srinivas Rao J, Ibrahim H. Al-Kharsan, and Dharmendra Kumar
EDP Sciences
This paper presents the simulation of a 15-level cross-H bridge multilevel inverter using control techniques like sinusoidal pulse width modulation and third harmonic injection pulse width modulation. This paper aims to enhance output voltage level using fewer switches and to decrease total harmonic distortion by improving overall efficiency. Compared to other inverter topologies cross H bridge topology uses a lesser number of switches and dc voltages. Analysis and simulation of 15-level cross H bridge MLI are performed and presented.
Srinivas Rao Janiga, Suresh Kumar Tummala, Ibrahim H. Al-Kharsan, and Ruby Faizan
EDP Sciences
This article presents bibliography of multilevel inverters from 2021-2022. The list of journal papers relating to multilevel inverters is included. The bibliography includes papers from 2021-2022.
Srinivas Rao J., Tummala Suresh Kumar, Hassan Mohmmed Al-Jawahry, and Manisha Saini
EDP Sciences
Present days renewable energy sources based grids are developing which needs inverters to convert power from DC to AC. 2-level inverters were used for this purpose to overcome the drawbacks of 2-level inverters multilevel inverters are developed. Because of the combination of numerous devices in a series structure, multilevel inverters provide outstanding solutions to high voltage, high power applications. With the use of suitable simulations and mathematical analysis, this paper compares the performance of 19 and 21-level cascaded H-Bridges with cross H-Bridge MLI. Total Harmonic Distortion levels, switching device count, and inverter output voltage and current are all compared. The primary issues brought up in this study are limitations of a number of switching devices that can support high voltage in the inverter. The benefit of this research is that it identifies the right inverter that can be utilised for real-time applications by taking the variables into account. The count of switching devices, output voltage, current, and harmonic distortion, among other factors. The Matlab/Simulink Platform is used to validate the analysis.
J. Srinivas Rao, Suresh Kumar Tummala, and Narasimha Raju Kuthuri
Springer Science and Business Media LLC
J. Srinivas Rao, Suresh Kumar Tummala, and G. Chandra Babu
IEEE
To increase the power capability and quality multilevel inverters are extensively used. The maintenance and switch stress of two stage switched capacitor module is high. So, this drawback can overcome by using single stage switching operation. In 9-level cascaded h-bridge multilevel inverter by using single stage switching operation, the number of switches is less and using only one source. Proposed topology gives high efficiency, faster response and high-power density compared to two stage switched capacitor module. The simulation is performed in MATLAB/SIMULINK environment.
Srinivas Rao Janiga and Suresh Kumar Tummala
EDP Sciences
Multilevel inverters have more prominent features than 2-level inverter due to various advantages like voltage quality, low EMI etc. The semi cross switched multilevel converter topology need less number of semiconductor switches compared to cascaded H-bridge multilevel inverter, and can be implemented to any number of voltage levels. The operating modes of 7-level semi cross switched multi level inverter are discussed. Three phase seven level inverter fed induction motor is implemented in MATLAB/SIMULINK.
J. Srinivas Rao, Suresh Kumar Tummala, and Narasimha Raju Kuthuri
Institute of Advanced Engineering and Science
Multilevel inverters offers eminent solutions to high voltage high power applications due to the association of several devices in a series configuration. In this paper, a comparative investigation of both 15 and 17 level cascaded h-bridge multi level inverter with cross h-bridge fed permanent magnet synchronous motor are presented by appropriate simulations and mathematical analysis. Comparative analysis includes Inverter output voltage and current, number of switching devices, stator current and speed of PMSM and total harmonic distortion levels. Limitation of several switching devices, which can afford high voltage in the inverter is the major problems raised in this study. The advantage of this analysis is to figure out the appropriate inverter that can be used for real time application by considering the factors via. Harmonic distortion, output voltage, current, number of switching devices etc. Validation of the analysis is processed through matlab/simulink platform.
B. Yogeswara Reddy*, , J. Srinivas Rao, Dr. T. Suresh Kumar, Nagarjuna, , , and
Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP
Modeling and simulation of fifteen level cross H bridge multilevel(ML) inverter fed three-phase PMSM presented in this paper. In order to overcome the setbacks of an inverter via switching losses and harmonic disturbance, Cross H bridge MLI topology is developed. The number of switches and DC voltages considered in this model are much inferior to other inverter topologies. The topology presented in the paper has better output and lower harmonic distortion (THD). Also, Permanent Magnet Synchronous Motor (PMSM) have significant advantages over other drives. Analysis and Simulations of 5, 9 and 15 level cross H bridge MLI were performed and presented.
Srinivas Rao Janiga, P. Srinivasa Varma, and T. Suresh Kumar
Institute of Advanced Engineering and Science
Multilevel Inverters offers eminent solutions to high voltage high power applications due to the association of several devices in a series configuration. This is moderate because of getting superior quality voltage waveform when using multilevel inverters as compared to form two-level inverters. Most of the problems raised in this study are the restriction of many switching devices, which can afford high voltage are preferred in the inverter. Here, a novel multilevel inverter topology with no transformers, less number of switching devices and gate drive circuits are proposed. The proposed inverter topologies can valid more voltage levels with favorable advantages such as less number of switching devices and gate driving circuits and also reduce to humble size, agreeable voltage profile. In this paper multilevel converter fed BLDC drive with different voltage levels and simulation analysis is presented. The validity of the proposed three-phase 21-level multilevel inverter fed to BLDC motor drive scheme is verified through Matlab/Simulink Platform.
J. Srinivas Rao, G. Ravi Kumar, and O. Chandra Sekhar
IEEE
This paper proposes a fuzzy controlled integrated speed - Sensorless approach for the speed control of Brushless DC Motor (BLDCM). This speed sensorless approach employs a load observer to estimate the disturbed load torque, and thus develops a speed sensorless algorithm. For the load observer, the inputs are mechanical rotor inertia constant and the friction coefficient, which are estimated using the recursive least-square rule. Thus this approach is insensitive to motor parameter variations and integrated drift problem. The proposed algorithm is simple when compared to extended Kalman filter in estimating the speed. A comparison is made among fuzzy controller, modified model reference adaptive control and PI controller. It is found that the fuzzy controller has superior performance over other two controllers. The proposed scheme is simulated using MATLAB/Simulink.