T.S.ANANDHI
@annamalaiuniversity.ac.in
Professor in Electronics & Instrumentation Engineering
Annamalai University
EDUCATION
B.E (ELECTRONICS & INSTRUMENTATION)
M.E(PROCESS CONTROL & INSTRUMENTATION)
PH.D (POWER ELECTRONICS)
RESEARCH INTERESTS
power electronics
solar energy
Control system
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Joseph Anthony Prathap and T.S. Anandhi
Wiley
Joseph Anthony Prathap and T.S. Anandhi
Elsevier BV
K. Ramash Kumar, T. S. Anandhi, B. Vijayakrishna, and S. Balakumar
Hindawi Limited
This paper studies on a new Hybrid Posicast Control (HPC) for Fundamental KY Boost Converter (FKYBC) worked in Continuous Current Mode (CCM). Posicast is a feed-forward compensator. It reduces the overshoot in the step result of the flippantly damped plant. But the conventional controller approach is sensitive owing to the changes in the natural frequency. So, as to reduce this undesirable sensitivity and load potential control of FKYBC, a HPC is designed in this article. Structure of HPC is posicast with feedback loop. The independent computational time delay is the main design function of the posicast. The enactment of the FKYBC with HPC is confirmed at various operating regions by making the MATLAB/Simulink and experimental model. The posicast function values are implemented in Arduino Uno-ATmega328P microcontroller. The results of new HPC have produced minimal noise in control signal in comparison with traditional PID control.
K. Ramash Kumar, T. S. Anandhi, B. Vijayakrishna, Monalisa Mohanty, M. Siva Ramkumar, H. A. Shivappa, Belachew Zegale Tizazu, B. Kirubakaran, and E. Thinapakar
Hindawi Limited
The aim of this paper is to investigate the design computation and prototype model implementation of a Modified Mechanical Structure (MMS) Electric Bike (E-Bike). It is the technology that allows the vehicle to operate with the assistance of electrical energy. All conventional cars will be converted to electric vehicles (EVs) in the future. EVs will be affordable to all types of people, allowing them to fly comfortably and safely. As a result, this paper proposes a design estimate and model implementation of the MMS E-Bike with the smallest number of parts, lowest expense, and lightest weight possible. The most important parts of the designed MMS E-Bike are the battery, MMS, BLDC motor, and electronic commutator with their controller. Because of its adapted mechanical frame nature, the designed E-Bike is low in cost and weight, and it can also go up to 25 kmph. Furthermore, the rider will be able to ride the built MMS E-Bike without any pain to their bodies and should be able to sit comfortably during their journey. In comparison to the Ampere Angel and DMW Electra 20 E-Bikes, the performance of the developed model is tested under various operating conditions, as well as their battery backup.
Joseph Anthony Prathap and T.S. Anandhi
Elsevier BV
Abstract In this paper, a novel parallel duty cycle control method is proposed to regulate the load voltage of the photo voltaic (PV) fed DC-DC buck converter. The proposed method concentrates on the control of PV fed DC-DC buck converter by fusing the two duty cycles from maximum power point tracking (MPPT) and digital proportional integral-digital pulse width modulation (DPI-DPWM) through the HDPWM algorithm. The fusion of the MPPT algorithms and DPI-DPWM algorithms achieve high precision in the voltage regulation of the PV fed DC-DC buck converter. The proposed parallel duty cycle control is passed through the HDPWM algorithm to compensate the high clocking frequency demand with the design resolution of 210 bits. Further, the design complexity of the HDPWM algorithm is reduced as the resolution of 210 bits is split as 25 and 25 bits for CDPWM and DDPWM respectively. The FPGA based implementation of the proposed parallel duty cycle method includes the synthesizable VHDL code for i) MPPT algorithms, ii) DPI-based DPWM algorithms, iii) Fusing of the MPPT-DPI-DPWM and iv) Passing the fused MPPT-DPI-DPWM through the HDPWM algorithm. The Xilinx Spartan 3A DSP, FPGA implementation is suitable for the proposed parallel duty cycle control method. The hardware results validate the satisfactory PV voltage regulation under continuous changing weather conditions. The transient response of INC-DPI-HDPWM seems to have a faster settling time compared to other MPPT-DPI-DPWM methods. Also, its FPGA implementation proves less area in design and low power consumption compared to the existing methods.
Joseph Anthony Prathap, T.S. Anandhi, and T.S. Sivakumaran
Elsevier BV
A.D. Senthil Kumar and T.S. Anandhi
IEEE
K. Muthukumar and T.S. Anandhi
Institute of Advanced Engineering and Science
Nowadays Solar energy is an important energy source due to the energy crisis and environment pollution. Maximum power point tracking (MPPT) algorithm improves the utilization efficiency of a photovoltaic systems. In this paper an improved P&O MPPT algorithm is developed and simulated using MATLAB / SIMULINK to control the DC/DC buck converter. The obtained simulink model is also verified using dspace tool. Both the simulated and experimental results are validated by also comparing them with conventional MPPT methods. The performance measures show the increase in the efficiency of PV system by the proposed model.
Chinnapettai Ramalingam Balamurugan, S.P. Natarajan, and T.S. Anandhi
Institute of Advanced Engineering and Science
The multi level inverter system is habitually exploited in AC drives, when both reduced harmonic contents and high power are required. In this paper, a new topology for three phase asymmetrical multilevel inverter employing reduced number of switches is introduced. With less number of switches, the cost, space and weight of the circuit are automatically reduced. This paper discusses the new topology, the switching strategies and the operational principles of the chosen inverter. Simulation is carried out using MATLAB-SIMULINK. Various conventional PWM techniques that are appropriate to the chosen circuit such as PDPWM, PODPWM, APODPWM, VFPWM and COPWM are employed in this work. COPWM technique affords the less THD value and also affords a higher fundamental RMS output voltage.
Chinnapettai Ramalingam Balamurugan, S.P. Natarajan, T.S. Anandhi, and R. Bensaraj
Institute of Advanced Engineering and Science
<p class="JESTECAbstract">This paper presents the comparison of various multicarrier Pulse Width Modulation (PWM) techniques for the Cascaded Hybrid Multi Level Inverter (CHBMLI). Due to switch combination redundancies, there are certain degrees of freedom to generate the five level AC output voltage. This paper presents the use of Control Freedom Degree (CFD) combination. The effectiveness of the PWM strategies developed using CFD are demonstrated by simulation and experimentation. The simulation results indicate that the chosen five level inverter triggered by the developed Phase Disposition(PD), Phase Opposition and Disposition(POD), Alternate Phase Opposition and Disposition (APOD), Carrier Overlapping (CO), Phase Shift (PS) and Variable Frequency (VF)<strong> </strong>PWM strategies developed are implemented in real time using FPGA. The simulation and experimental outputs closely match with each other validating the strategies presented.</p>
Joseph Anthony Prathap, T. S. Anandhi, and T. S. Sivakumaran
IEEE
B. Kunjithapatham, T.S. Anandhi, and J. Arputha Vijaya Selvi
IEEE
Nowadays the asymmetrical cascaded Multi-Level Inverter (MLI) concepts are predominantly investigated. This paper deals with the multi constant dc carrier modulation strategy for 3Φ 27 level Trinary Hybrid MLI (THMLI). The suitability and qualities of the modulation strategy is investigated by simulation using MATLAB/Simulink and also implemented in real time using dSPACE real time interface controller. The proposed task focuses on the reduction of harmonics content in output phase voltages and line voltages of the 3Φ THMLI. The viability of the multi constant dc carrier technique on the MLI has also been presented.
Prathap Joseph Anthony, T. S. Anandhi, and T. S. Sivakumaran
Indian Society for Education and Environment
Objectives: In this paper, a Field Programmable Gate Array (FPGA) based real time implementation of a closed loop controller for regulating the load voltage under line and load disturbances by generating Digital Pulse Width Modulation (DPWM) is developed. Digital Proportional Integral (DPI) controller is designed to generate the DPWM. Methods: DPWM are developed by two methods: Counter based and Delay line based. The closed loop DPWM activated DC-DC buck converter is simulated using MODELSIM and tested in real time using Xilinx Spartan 3A DSP FPGA. Findings: Hardware results show the regulated load voltage by updating the DPWM control signal duty cycle to compensate the line and load disturbances. FPGA based DPWM provides less complexity in design. Improvements: Hybrid based DPWM method with closed loop control for DC-DC Buck converter could be used for voltage regulation.
Chinnapettai Ramalingam Balamurugan, S.P. Natarajan, T.S. Anandhi, and B. Shanthi
Institute of Advanced Engineering and Science
<p>Depending on the number of levels in output voltage, inverters can be divided into two categories: two level inverter and Multi Level Inverters (MLIs). An inverter topology for high voltage and high power applications that seems to be gaining interest is the MLI. In high power and high voltage applications, the two level inverters have some limitations in operating at high frequency mainly due to switching losses and constraints of device rating.In this paper, a three phase H + type FCMLI (Flying Capacitor MLI) using sinusoidal reference, third harmonic injection reference, 60 degree reference and stepped wave reference are initially developed using SIMULINK and then implemented in real time environment using dSPACE. In H-type FCMLI with R-load it is inferred that bipolar COPWM-C provides output with relatively low distortion for 60 degree reference and bipolar COPWM-C strategy is found to perform better since it provides relatively higher fundamental RMS output voltage for THI reference. The five level output voltages of the chosen MLIs obtained using the MATLAB and dSPACE based PWM (Pulse Width Modulation) strategies and the corresponding %THD (Total Harmonic Distortion), V<sub>RMS</sub> (fundamental), CF (Crest Factor) and FF (Form Factor) are presented and analyzed.</p>
K. Muthukumar, T. S. Anandhi, and S. P. Natarajan
Praise Worthy Prize
Multilevel inverters are increasingly used in medium and high power applications owing to advantages such as modularity, low power dissipation on switching devices and reduced harmonic distortion at the output of the inverter. The MLI structure used in this paper incorporates four H-bridges cascaded together with trinary mode of selection of dc power supply that facilitates 81 levels of output voltage. The designed 81 level Trinary Hybrid Cascaded Multilevel Inverter (THCMLI) uses bipolar multi-carrier pulse width modulation strategy. The performance quality in terms of THD, crest factor, form factor, and power distortion factor are evaluated for different modulation indices. From simulated results it is observed that the THD of the 81level is reduced satisfactorily in POD PWM and power distortion is reduced in PD PWM strategy and high RMS value of output voltage is achieved in APOD PWM strategy when compared with other strategies with FAFF and FAVF for THCMLI. Increased number of voltage levels upto 81 levels in the output waveform is obtained shows the improved quality and nearness to sinewave with sixteen switches.
S Dharmalingam, L Sivakumar, T Anandhi, and M Umapathy
SAGE Publications
The design and performance of steam generators supplied to thermal power plants are greatly influenced by the properties of coal burnt. All coals are not same and the variation of heating value of coal supplied to boiler results in changes in critical process parameters like pressure and temperature of main steam produced. These fluctuations are normally controlled by master pressure controller, provided the variation in heating value is within certain limits. If the heating value of coal being burnt varies substantially, a remedial measure is necessary to control the pressure and temperature fluctuations during coal fuel switching. The composition of the coal burnt currently in a boiler is determined from an online analyser, and an embedded controller computes the current heating value of the coal and suitably modifies the gains of all the controllers to arrest the undue fluctuations in pressure and temperature. A validated mathematical model for a typical 500 MW plant is used to simulate the variations in pressure and temperature of steam with normal and embedded controllers. Significant reduction in pressure and temperature variation has been achieved with an embedded controller. This article discusses the improved method of ensuring optimum boiler performance during coal fuel switchover.
T.S. Anandhi, S.P. Natarajan, and T. Anitha
IEEE
UC3907 ASIC and TMS320F2407A DSP based control of paralleled buck DC-DC converters are developed and presented in this work to maintain a regulated output voltage under variations in the line and load and to control the output current of each converter so that they share the load current equally. Automatic master slave method is implemented in the present work. UC3907 load share controller and TMS320F2407A DSP based fuzzy logic controller perform linear regulation with satisfactory load current sharing.