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    A Harmonic Suppression Scheme for Full Speed Range of a Two-Level Inverter Fed Induction Motor Drive Using Switched Capacitive Filter

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    This paper proposes a novel harmonic suppression scheme for two-level inverter fed three-terminal induction motor drives using switched capacitive filter. Capacitor fed H-bridges used as filters are cascaded to conventional two-level inverter to eliminate fifth- and seventh-order harmonics for the full modulation range including a six-step operation.

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    A Highly Efficient and Reliable Inverter Configuration Based Cascaded Multilevel Inverter for PV Systems

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    This paper presents an improved cascaded multilevel inverter (CMLI) based on a highly efficient and reliable configuration for the minimization of the leakage current. Apart from a reduced switch count, the proposed scheme has additional features of low switching and conduction losses.

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    A New-Coupled-Inductor Circuit Breaker for DC Applications

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    In order to eliminate power conversion steps, future microgrids with renewable energy sources are being visualized as dc power systems. System components such as sources (solar panels, fuels cells, etc.) loads, and power conversion have been identified and are readily available.

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    A New Reduced Switch Count Pulse Width Modulated Multilevel Inverter

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    The paper develops a new topology for a single phase cascaded H- Bridge multilevel inverter (CHB MLI) with a focus to reduce the number of power switching devices in the path for the flow of current. The philosophy combines an array of series connected voltage sources on either side of an H- bridge inverter to derive the new configuration for the MLI. It allows a Multicarrier Pulse Width Modulation (MCPWM) approach to the process.

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    A New Single-Phase Switched-Coupled-Inductor DC–AC Inverter for Photovoltaic Systems

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    This paper presents a new single-phase switchedcoupled-inductor dc–ac inverter featuring higher voltage gain than the existing single-phase qZ-source and semi-Z-source inverters. Similar to the single-phase qZ-source and semi-Z-source inverters, the proposed inverter also has common grounds between the dc input and ac output voltages, which is beneficial especially for photovoltaic inverter systems

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    A Novel Single-Stage Single-Phase Reconfigurable Inverter Topology for a Solar Powered Hybrid ACDC Home

    • B.Tech / M.Tech / M.Sc / Ph.D

    •  GANGADHAR.T

    • 12 Months ago

    This paper suggests a reconfigurable singlephase inverter topology for a hybrid ac/dc solar powered home. This inverter possesses a single-phase single-stage topology and the main advantage of this converter is that it can perform dc/dc, dc/ac, and grid tie operation, thus reducing loss, cost, and size of the converter.

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    A Novel STATCOM Based on Diode-Clamped Modular Multilevel Converters

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    A new static synchronous compensator (STATCOM) based on the diode-clamped modular multilevel converter (DCM2C) is proposed in this paper. In this converter topology, the capacitor voltage is clamped by using a low power rating diode in each submodule.

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    A Novel Structure for Single-Switch Nonisolated Transformerless Buck–Boost DC–DC Converter

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    A novel transformerless buck–boost dc–dc converter is proposed in this paper. The presented converter voltage gain is higher than that of the conventional boost, buck–boost, CUK, SEPIC, and ZETA converters, and high voltage can be obtained with a suitable duty cycle

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    A Performance Investigation of a Four-Switch Three-Phase Inverter-Fed IM Drives at Low Speeds Using Fuzzy Logic and PI Controllers

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    This paper presents a speed controller using a fuzzylogic controller (FLC) for indirect field-oriented control (IFOC) of induction motor (IM) drives fed by a four-switch three-phase (FSTP) inverter. In the proposed approach, the IM drive system is fed by an FSTP inverter instead of the traditional six-switch three-phase (SSTP) inverter for cost-effective low-power applications. The proposed FLC improves dynamic responses.

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    A Robust Back stepping High-Order Sliding Mode Control Strategy for Grid-Connected DG Units With Harmonic/Inter harmonic Current Compensation Capability

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    This paper presents a new nonlinear current control strategy based on backstepping control and high-order sliding mode differentiator in order to employ distributed generation (DG) unit interfacing converters to actively compensate harmonics/interharmonics of local loads. The converter-based DG unit is connected to a weak grid (with uncertain impedance) and local load (that can be parametrically uncertain and topologically unknown) through an LCL filter.

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    A Single-Phase Grid-Connected Photovoltaic Inverter Based on a Three-Switch Three-Port Flyback With Series Power Decoupling Circuit

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    In this paper, a novel single-stage threeport inverter that connects photovoltaic (PV) panel to a single-phase power grid is introduced. In a single-phase grid-connected PV panel, the input power is constant during the line-frequency period, while the output power oscillates at double-line frequency.

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    A Single-Phase Transformerless Inverter With Charge Pump Circuit Concept for Grid-Tied PV Applications

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    This paper proposes a new single-phase transformerless photovoltaic (PV) inverter for grid-tied PV systems. The topology is derived from the concept of a charge pump circuit in order to eliminate the leakage current. It is composed of four power switches, two diodes, two capacitors, and an LCL output filter.

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    A Three-Level LC-Switching-Based Voltage Boost NPC Inverter

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    A single-stage high-voltage gain boost inverter is getting popularity in applications like solar photovoltaic, fuel cell, uninterruptible power system (UPS) systems, etc. Recently, single-stage voltage boost multilevel Z-source inverter (ZSI) and quasi-Z-source inverter (QZSI) have been proposed for dc–ac power conversion with improved power quality.

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    ACMC-based hybrid AC/LVDC micro-grid

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    This study proposes the detailed modelling of a novel automatic centralised micro-grid controller (ACMC)-based hybrid AC/low-voltage DC (LVDC) micro-grid network, capable of off-grid and on-grid operation of the system with a coordinated control. The micro-grid is designed to work majorly with renewable power sources.

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    An Induction Generator-Based ACDC Hybrid Electric Power Generation System for More Electric Aircraft

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    In more electric aircraft (MEA) system, both ac and dc electric power with multiple voltage levels are required for various aircraft loads. This paper presents an induction generator-based ac/dc hybrid electric power generation system for MEA. In the proposed system architecure, a high-speed induction starter/generator and a low-speed induction generator are installed on the high pressure (HP) and low pressure (LP) spools of the engine, respectively

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    An Optimized Three-Phase Multilevel Inverter Topology With Separate Level and Phase Sequence Generation Part

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 11 Months ago

    This paper presents an optimized, 3-?, multilevel inverter (MLI) topology. The proposed system is derived by cascading the level generation part with the phase sequence generation part. Further, it can be operated at any required level depending upon the configuration of the level generation part. Thus, for higher level operation extra components are required at the level generation part only. Therefore, number of components required for the proposed MLI is lower than the conventional 3-? MLI topologies for higher level operation.

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    Analysis of cascaded H-bridge multilevel inverter configuration with double level circuit

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    In this study, a new multilevel inverter configuration which introduces a combination of cascaded H-bridge multilevel inverter with a double level circuit is proposed. The double level circuit is a half-bridge inverter when combined with a cascaded H-bridge multilevel inverter, will increase the output voltage level to nearly twice that of a conventional cascaded H-bridge multilevel inverter.

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    Control and Experiment of AC/AC Sparse Modular Multilevel Converter

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    The sparse modular multilevel converter (MMC) is a new type of high-voltage ac/ac MMC topology suitable for highpower applications. It is based on an alternative configuration of half/full-bridge submodules, and voltage unfolder stages on each side of the converter.

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    Control of Active Power Exchange With Auxiliary Power Loop in a Single-Phase Cascaded Multilevel Converter-Based Energy Storage System

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    Cascaded multilevel converter (CMC)-based energy storage system, which consists of cascaded H-bridge converters and energy storage components, is a promising option to compensate fluctuating electric power of renewable energy.

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    Control strategy of switching regulators for fuel-cell power applications

    • B.TECH / M.TECH / M.SC / PH.D

    •   GANGADHAR.T

    • 12 Months ago

    It is often assumed that the input voltage source of a switch-mode power supply is constant or shows negligible small variations. However, the last assumption is no longer valid when a fuel-cell stack is used as input source.

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