- Vellore, Tamil Nadu, India
Research Interests:
Research Interests:
Reduction of switch count in symmetrical and asymmetrical reduced switch multilevel inverter designs has been proposed regularly with operation of conventional carrier-based pulse width modulation technique. In this study, a novel... more
Reduction of switch count in symmetrical and asymmetrical reduced switch multilevel inverter designs has been proposed regularly with operation of conventional carrier-based pulse width modulation technique. In this study, a novel structure of symmetrical Hexa shaped model reduced switch seven level output inverter is proposed without any auxiliary switch and H-bridge. Proposed structure offers a smaller number of switch count and voltage sources which results in the cost and complexity reduction of its implementation. To operate the switching sequence of inverter from carrier based APOD, POD and PD methods, suitable logical expression to be realize which gained more prominence. Active utilization of two voltage sources in each mode of operation results in significant reduction of voltage stress across each switch is achieved. A comparative study of proposed MLI with various reduced switch MLIs has been presented. Initially, simulation model implementation has been carried out with ...
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Research Interests:
Research Interests:
Induction machine are widely used in most of the industries and house hold appliances etc. in motoring operation or else it is working as a generator in variable wind speed power generation scheme, cage rotor induction machines are... more
Induction machine are widely used in most of the industries and house hold appliances etc. in motoring operation or else it is working as a generator in variable wind speed power generation scheme, cage rotor induction machines are suitable for motor and generator operation because of its rugged rotor construction, simple in control, easy to maintenances. Different techniques are implemented to control the speed; V/F control is predominant to others in particular for variable speed drive applications. Attempted to implement the V/F control of a 3-Ф, 1kW, 415V, 2.2A, and 1440 rpm delta connected machine is presented in this paper. The machine parameters are estimated on line by using Lab VIEW. It is normalized and substituted in computer simulation study. A separate sine PWM and space vector PWM controller developed in MATLAB/SIMULINK software for open loop control. Power circuit of two-level inverter with induction motor is configured using the built in libraries of power system too...
This paper proposes the analysis and design of new current fed full bridge high gain isolated dc-dc converter for fuel cell application. The proposed converter uses voltage multiplier cells on the secondary side. The objective of the... more
This paper proposes the analysis and design of new current fed full bridge high gain isolated dc-dc converter for fuel cell application. The proposed converter uses voltage multiplier cells on the secondary side. The objective of the proposed converter is to generate DC link voltage for three phase grid from fuel cell. Current fed Converter reduces the input current ripple at the fuel cell input. The converter utilizes the energy stored in the transformer leakage and parasitic capacitance to maintain zero-current-switching (ZCS) over wide range. Soft switching permits higher switching frequency operation, reducing the size, weight and cost of the magnetic components and improve the converter efficiency. A new design method of half-wave Cockcroft–Walton Voltage Multiplier (H-W C-W VM) that lays on the calculation of the optimal number of stages, which is necessary to produce the desired output voltage with the minimum total capacitance value, is also presented. The operating frequenc...
This paper presents isolated high boost dc-dc flyback converter with high voltage gain suitable for renewable energy source. The circuit consists of active clamp circuit and boost converter with isolated transformer. The circuit employs... more
This paper presents isolated high boost dc-dc flyback converter with high voltage gain suitable for renewable energy source. The circuit consists of active clamp circuit and boost converter with isolated transformer. The circuit employs capacitors are charged in parallel and discharged in series by isolated transformer inductors. The active clamp circuit is used during the turn off-period to reduce the voltage spike on power switch. To achieve high output voltage gain the flyback converter output terminal and boost converter output terminal are connected in serially with the isolated inductors with less voltage stress on controlled power switch and power diodes. PSIM software has been used for simulation. Hardware model implemented and tested in the laboratory.
Multilevel inverter is emerging as a new breed of power inverter for high power applications, especially in FACTS controllers. This can develop high voltage with reduce harmonics through its own circuit topology. The power levels of the... more
Multilevel inverter is emerging as a new breed of power inverter for high power applications, especially in FACTS controllers. This can develop high voltage with reduce harmonics through its own circuit topology. The power levels of the inverter are largely controlled by carrier frequency. For an air cooled design, the frequency is practically limited to 3 to 5 KHz. It
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Abstract-- The Multilevel inverter is emerging as a new breed of power inverter option for high power applications, Especially for FACTS controllers. This can create high voltage and reduce harmonics by its own circuit topology. The power... more
Abstract-- The Multilevel inverter is emerging as a new breed of power inverter option for high power applications, Especially for FACTS controllers. This can create high voltage and reduce harmonics by its own circuit topology. The power levels of the inverter are largely ...
Research Interests:
Abstract This paper presents the implementation of TMS320LF2407 DSP processor Kit to identify the single phasing fault online, based on the stator current. The Induction motors are most widely used motors in industrial, commercial and... more
Abstract This paper presents the implementation of TMS320LF2407 DSP processor Kit to identify the single phasing fault online, based on the stator current. The Induction motors are most widely used motors in industrial, commercial and residential sectors because of ...