Relevant bibliographies by topics / Transformer Less Inverter

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  1. Journal articles
  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'Transformer Less Inverter'

Author: Grafiati
Published: 4 June 2025
Last updated: 6 July 2025

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Journal articles on the topic "Transformer Less Inverter"

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Nireekshana, Namburi. "A POD Modulation Technique Based Transformer less HERIC Topology for PV Grid Tied-Inverter." E3S Web of Conferences 616 (2025): 01001. https://doi.org/10.1051/e3sconf/202561601001.

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Transformer-based inverters offer galvanic isolation, which improves safety by physically disconnecting the PV array from the grid. Simultaneously, transformers contribute to extra energy losses as a result of their intrinsic resistance and inductance, resulting in reduced overall system efficiency. Integrating a transformer within the inverter increases its size and weight, which adds complexity to the installation process and necessitates stronger mounting options. Transformers produce excess heat, which requires more advanced cooling methods and may decrease the lifespan of the inverter components owing to thermal strain. Transformers can restrict the inverter’s frequency response, which can impact its capacity to rapidly adjust to variations in load or grid circumstances. Hence, in order to circumvent these intricacies, this article introduces a transformer less full-bridge PV grid structure. The proposed technique is an advanced and efficient technology that con-verts DC voltage generated by photovoltaic (PV) solar panels into AC voltage that can be safely fed into the electrical grid. This inverter employs a HERIC topology. HERIC transformer-less full-bridge PV grid-tied inverters are an advanced and efficient option for converting solar power into electricity. They are very dependable and are ideal for cur-rent PV systems that focus on maximum energy production while reducing installation and operational expenses. This article presents the development of a HERIC transformer-less photovoltaic (PV) grid-tied inverter using insulated-gate bipolar transistor (IGBT) switches in MATLAB Simulink.
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Noor, Shahreen, Md Noman Habib Khan, and K. M. Abdul Al Woadud. "Cost and Efficiency Analysis of PV Transformer-Less Inverter Topology to Grid Connection." European Journal of Engineering Research and Science 2, no. 3 (2017): 17. http://dx.doi.org/10.24018/ejers.2017.2.3.290.

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Photovoltaic (PV) inverters bear a part and parcel role due to cost and power efficiency where it can be used either in Transformer based system or Transformer-less system. Both system even though the renewable energy which is fully Environmental friendly, however some limitations such as bulky system, maintenance cost increasing indicate for avoiding the Transformer based inverter. In contrast, Transformer -less inverter topology is recovering the TRX based issue and to reduce the overall system cost size with high efficiency. In this paper, Transformer -based inverters have been discussed as well as Transformer –less (TRX) inverter topologies and main focusing part is the cost analysis of TRX inverter topology to grid connection and the different marking process of PV-TRX Inverter Topology to Grid Connection has been shown as well as comparison will be shown with Bangladesh.
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Noor, Shahreen, Md Noman Habib Khan, and K. M. Abdul Al Woadud. "Cost and Efficiency Analysis of PV Transformer-Less Inverter Topology to Grid Connection." European Journal of Engineering and Technology Research 2, no. 3 (2017): 17–23. http://dx.doi.org/10.24018/ejeng.2017.2.3.290.

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Photovoltaic (PV) inverters bear a part and parcel role due to cost and power efficiency where it can be used either in Transformer based system or Transformer-less system. Both system even though the renewable energy which is fully Environmental friendly, however some limitations such as bulky system, maintenance cost increasing indicate for avoiding the Transformer based inverter. In contrast, Transformer -less inverter topology is recovering the TRX based issue and to reduce the overall system cost size with high efficiency. In this paper, Transformer -based inverters have been discussed as well as Transformer –less (TRX) inverter topologies and main focusing part is the cost analysis of TRX inverter topology to grid connection and the different marking process of PV-TRX Inverter Topology to Grid Connection has been shown as well as comparison will be shown with Bangladesh.
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Daniel A Figueiredo and Sanjay S Pawar. "Single Phase Transformer Less Inverter for Grid Connected Photo Voltaic System." International Journal of Scientific Research in Science and Technology 11, no. 2 (2024): 463–68. http://dx.doi.org/10.32628/ijsrst2412344.

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Sustainable power generation systems have been developed as a result of increased consumption of energy, the rapid depletion of fossil fuels, and environmental degradation worldwide. Thus, the demand for photovoltaic systems is increasing, owing to the increased need for renewable resources worldwide. Transformers are often used in photovoltaic systems to offer voltage ratio conversions between input and output along with galvanic isolation. The inverter, that may be a transformer-less or with a transformer, is the enabling technology in PV systems. But, the efficiency and power density of these traditional iron and copper-based transformers are decreased while the inverter's weight, size, and cost are increased. Thus, it is recommended to refrain from utilizing transformers within the inverter. For this reason, transformer-less inverters for grid-tied, low-voltage, single-phase photovoltaic (PV) systems have gained more attention thesedays. To comply with the safety requirements imposed by grid regulations, there are a few distinctive challenges, particularly with respect to leakage current problems, which need to be sufficiently handled. Owing to this In recent years, distributed solar grid-tied systems have made widespread use of single phase transformerless Voltage Source Inverters.
 This paper explores a novel transformer-less solar inverter for grid connected PV system and Results are investigated in MATLAB Simulink provided a significant reduction in distortion in voltage and current at load side.
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P, Maithili, and Kanakaraj J. "Transformer Less Self-Commutated PV Inverter." Regular issue 10, no. 8 (2021): 1–4. http://dx.doi.org/10.35940/ijitee.g9037.0610821.

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The power demand is increased day by day and generation of electrical energy from non-renewable sources are not able to meet the demand. An alternate energy sources are the only solution to meet the power demand. The power generation from solar energy with photovoltaic effect is plays a major role. This Solar PV system has low efficiency. The power semiconductor devices and converter circuit along with inductive / magnetic circuit. The Inverter circuit have an influence on photovoltaic power generation to improve the level of output voltage along with efficiency. In this paper a new transformer less DC-AC converter is proposed, and it has high efficiency, requires less cost when compares with conventional inverter with transformer. Transformer less self-commutated photovoltaic inverter is reflected the advantages of central and string inverters. It gives high output power and low-cost converter. These transformer less DC-AC converter is connect with Boost/Buck-Boost converter for the better output. So, this proposed DC-AC converter topology is not required mechanical switching and it is lighter in size. The PV technology has low efficiency and utilize more cost for generation of power. The proposed transformer less PV inverter is the better choice to increase the usefulness and reduce the charge rate of this PV system.
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Maithili, P., and J. Kanakaraj. "Transformer Less Self-Commutated PV Inverter." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 10, no. 8 (2021): 1–4. https://doi.org/10.35940/ijitee.G9037.0610821.

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The power demand is increased day by day and generation of electrical energy from non-renewable sources are not able to meet the demand. An alternate energy sources are the only solution to meet the power demand. The power generation from solar energy with photovoltaic effect is plays a major role. This Solar PV system has low efficiency. The power semiconductor devices and converter circuit along with inductive / magnetic circuit. The Inverter circuit have an influence on photovoltaic power generation to improve the level of output voltage along with efficiency. In this paper a new transformer less DC-AC converter is proposed, and it has high efficiency, requires less cost when compares with conventional inverter with transformer. Transformer less self-commutated photovoltaic inverter is reflected the advantages of central and string inverters. It gives high output power and low-cost converter. These transformer less DC-AC converter is connect with Boost/Buck-Boost converter for the better output. So, this proposed DC-AC converter topology is not required mechanical switching and it is lighter in size. The PV technology has low efficiency and utilize more cost for generation of power. The proposed transformer less PV inverter is the better choice to increase the usefulness and reduce the charge rate of this PV system. 
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Suroso and Siswantoro Hari. "A performance comparison of transformer-less grid tied PV system using diode clamped and neutral point shorted inverters." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 702–10. https://doi.org/10.11591/ijpeds.v11.i2.pp702-710.

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Grid tied photovoltaic (PV) system is an operation mode of PV system working together with utility power supply to provide power to the power load. Conventionally, transformer is used together with the power inverter. The power transformer works as galvanic insolation amongst PV system and power grid. It works also to raise the voltage of power inverter. However, use of transformer will add system complexity, price, weight and size of the entire system. Transformer-less system is an alternative to make the system simpler and more practical in use. The paper discusses performance of transformer-less grid tied PV systems using diode clamped and neutral point shorted inverters. Effects of transformer elimination to the feat of the grid tied PV system especially harmonics content and leakage current of PV system were examined and analyzed. The performance was also compared with the traditional system using H-bridge inverter. The leakage currents did not flow in the system applying diode clamped inverter, and neutral point shorted inverter. In case of harmonics content, the diode clamped inverter injected less harmonics components than the neutral point shorted inverter. The neutral point shorted provides a simpler inverter circuit in the transformerless systems.
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Biswas, Mohua, Shuvra Prokash Biswas, Md Rabiul Islam, Md Ashib Rahman, Kashem M. Muttaqi, and S. M. Muyeen. "A New Transformer-Less Single-Phase Photovoltaic Inverter to Improve the Performance of Grid-Connected Solar Photovoltaic Systems." Energies 15, no. 22 (2022): 8398. http://dx.doi.org/10.3390/en15228398.

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Photovoltaic (PV) energy systems have found diverse applications in fulfilling the increasing energy demand worldwide. Transformer-less PV inverters convert the DC energy from PV systems to AC energy and deliver it to the grid through a non-isolated connection. This paper proposes a new transformer-less grid-connected PV inverter. A closed-loop control scheme is presented for the proposed transformer-less inverter to connect it with the power grid. The proposed transformer-less inverter reduces extra leakage current and holds the common-mode voltage at a constant point. To eliminate extra leakage current, as well as achieve constant common-mode voltage, a midpoint clamping method is utilized to operate the inverter. The proposed transformer-less inverter is formed of seven insulated gate bipolar transistors (IGBTs) employing a unipolar sinusoidal pulse width modulation (SPWM) technique for switching purposes. An LCL filter is employed to reshape the two-level inverter output voltage and current to obtain closer sinusoidal waveforms. The output voltage and current total harmonic distortion (THD) of the proposed transformer-less inverter were found to be 1.25% and 0.94%, respectively, in the grid-connected mode. The leakage current elimination mechanism with the proposed transformer-less inverter is deeply analyzed in this paper. The performances of the proposed transformer-less inverter were evaluated with MATLAB/Simulink simulation and validated in a laboratory scale experiment.
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Vinitha, R., and P. Shankar. "Improvement of Transformer-less Inverter Output Voltage Using 7-Level Single Phase Inverter and LCL Filter." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (2022): 613–17. http://dx.doi.org/10.22214/ijraset.2022.43676.

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Abstract-The system is designed for transformer-less inverter which has harmonic distortion present in their output voltage due to power electronic switching. Total Harmonic Distortion present within the output voltage may be minimized by using 7-level cascaded H-Bridge inverter rather than previous multilevel inverter. An LCL filter with damping resistor is proposed which might be used between the inverter and therefore the load. In the recent days the renewable energy sources has increased rapidly, as these individuals power sources are getting increased throughout the years. Power electronics are getting great at controlling and having a great advantage to process the power. Inverters are one of these power electronic devices used in the process of conversion of DC to AC power. The transformer-less inverter has an excellent efficiency, also not having a transformer the device is compact, have less weight and cheaper. Harmonics is one of the power quality problem and need to eradicate at the proper time to reduce significant power losses thus multilevel inverters are receiving more attention in industrial application and renewable energy system. The DC link capacitor is used to reduce the fluctuation of the DC voltage. These harmonic distortion are generated because of power electronic switching, Using Mat lab /Simulink software the 7-level cascaded H-Bridge multilevel inverter is simulated. This system will help in securing the loads and reducing the loss due to heating caused by unwanted harmonics in the voltage Keywords – Multilevel Inverter, Harmonics, Switching, Filter, Transformer-less
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R, Selvamathi, Indragandhi V, and Ashok kumar L. "Analysis of transformer less inverter for PV applications." International Journal of Engineering & Technology 7, no. 2-1 (2018): 427. http://dx.doi.org/10.14419/ijet.v7i2.9995.

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To enhance the effectiveness and decrease the cost of a Photovoltaic (PV) system, the utilization of transformer less PV inverters is an option of expanding interest. In any case, this topology should be considered in detail, as it shows a few issues like effectiveness degradation and safety issues identified with the galvanic association between the system and the PV generator.In this research paper, a review of standalone and grid-connected PV inverter structures has been done. From one viewpoint, a few options in light of established structures have been introduced. At last parasitic capacitance in PV arrays and leakage current produced from PV systems are examined.
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Dissertations / Theses on the topic "Transformer Less Inverter"

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Badr, Nadine. "Interpolation réelle des espaces de Sobolev sur les espaces métriques mesurés et applications aux inégalités fonctionnelles." Phd thesis, Université Paris Sud - Paris XI, 2007. http://tel.archives-ouvertes.fr/tel-00736066.

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Dans cette thèse, nous étudions l'interpolation réelle des espaces de Sobolev et ses applications. Le manuscrit est constitué de deux parties. Dans la première partie, nous démontrons au premier chapitre que les espaces de Sobolev non homogènes W^1_p (resp. homogènes ) sur les variétés Riemanniennes complètes vérifiant la propriété de doublement et une inégalité de Poincaré forment une échelle d'interpolation réelle pour un intervalle de valeurs de p. Nous étendons ce résultat à d'autres cadres géométriques. Dans un deuxième court chapitre, nous comparons différents espaces de Sobolev sur le cone Euclidien et nous regardons le lien de ces espaces avec l'interpolation. Nous montrons sur cet exemple que l'hypothèse de Poincaré n'est pas une condition nécessaire pour pouvoir interpoler les espaces de Sobolev. Dans le dernier chapitre de cette partie, nous définissons les espaces de Sobolev non homog'nes W^1_p,V (resp. homogènes ) associés à un potentiel positif V sur une variété Riemannienne. Nous démontrons que si la variété véifie la propriété de doublement et une inégalité de Poincaré et si de plus V est dans une classe de Holder inverse, ces espaces forment aussi une échelle d'interpolation réelle pour un intervalle de valeurs de p. Nous étendons ce résultat aux cas des groupes de Lie. Dans la deuxième partie, dans un premier chapitre en collaboration avec E. Russ, nous étudions sur un graphe vérifiant la propriété de doublement et une inégalité de Poincaré, la Lp bornitude de la transformée de Riesz pour p > 2 et son inégalité inverse pour p < 2. Pour notre but, nous démontrons aussi des résultats d'interpolation des espaces de Sobolev et des inégalités de Littlewood-Paley. Dans le deuxième chapitre, nous démontrons en utilisant notre résultat d'interpolation, des inégalités de Gagliardo-Nirenberg sur les variétés Riemanniennes complètes vérifiant le doublement, des inégalités de Poincaré et pseudo-Poincaré. Ce résultat s'applique aussi dans le cadre des groupes de Lie et des graphes.
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"High Power Density, High Efficiency Single Phase Transformer-less Photovoltaic String Inverters." Doctoral diss., 2017. http://hdl.handle.net/2286/R.I.45041.

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abstract: Two major challenges in the transformer-less, single-phase PV string inverters are common mode leakage currents and double-line-frequency power decoupling. In the proposed doubly-grounded inverter topology with innovative active-power-decoupling approach, both of these issues are simultaneously addressed. The topology allows the PV negative terminal to be directly connected to the neutral, thereby eliminating the common-mode ground-currents. The decoupling capacitance requirement is minimized by a dynamically-variable dc-link with large voltage swing, allowing an all-film-capacitor implementation. Furthermore, the use of wide-bandgap devices enables the converter operation at higher switching frequency, resulting in smaller magnetic components. The operating principles, design and optimization, and control methods are explained in detail, and compared with other transformer-less, active-decoupling topologies. A 3 kVA, 100 kHz single-phase hardware prototype at 400 V dc nominal input and 240 V ac output has been developed using SiC MOSFETs with only 45 μF/1100 V dc-link capacitance. The proposed doubly-grounded topology is then extended for split-phase PV inverter application which results in significant reduction in both the peak and RMS values of the boost stage inductor current and allows for easy design of zero voltage transition. A topological enhancement involving T-type dc-ac stage is also developed which takes advantage of the three-level switching states with reduced voltage stress on the main switches, lower switching loss and almost halved inductor current ripple. In addition, this thesis also proposed two new schemes to improve the efficiency of conventional H-bridge inverter topology. The first scheme is to add an auxiliary zero-voltage-transition (ZVT) circuit to realize zero-voltage-switching (ZVS) for all the main switches and inherent zero-current-switching (ZCS) for the auxiliary switches. The advantages include the provision to implement zero state modulation schemes to decrease the inductor current THD, naturally adaptive auxiliary inductor current and elimination of need for large balancing capacitors. The second proposed scheme improves the system efficiency while still meeting a given THD requirement by implementing variable instantaneous switching frequency within a line frequency cycle. This scheme aims at minimizing the combined switching loss and inductor core loss by including different characteristics of the losses relative to the instantaneous switching frequency in the optimization process.<br>Dissertation/Thesis<br>Doctoral Dissertation Electrical Engineering 2017
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Book chapters on the topic "Transformer Less Inverter"

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Chavan, Shamkumar B., Umesh A. Kshirsagar, and Mahesh S. Chavan. "Development of Transformer-Less Inverter System for Photovoltaic Application." In Communications in Computer and Information Science. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1810-8_46.

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Gouse Basha, Shaik, and M. Venkatesan. "A Review on Topologies for Transformer-Less Grid-Connected PV Inverter." In Lecture Notes in Electrical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5558-9_98.

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Tekale, Anil, and Swapna God. "Charge Pump Circuit Based Grid-Tied PV System for Single Phase Transformer Less Inverter Using Fuzzy Logic Controller." In Techno-Societal 2020. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69925-3_8.

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Sathyanathan, P., P. Usha Rani, and Promod Ranjan Debnath. "Single Phase Transformerless Switched Capacitor Multi Level Inverter for Solar PV Applications." In Artificial Intelligence and Communication Technologies, 2023rd ed. Soft Computing Research Society, 2023. http://dx.doi.org/10.52458/978-81-955020-5-9-74.

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Multilevel inverters (MLIs) have been proposed for the purpose of increase power level and to improve the power factor and total harmonic distortion (THD) in comparison with conventional two-level inverters. This technological advancement helps to achieve high performance and low cost, transformer less multi-level inverters which may commonly exploited in grid tied Photovoltaic (PV) generating systems. The application areas of MLIs are residential use in uninterruptible power supplies (UPSs); All these applications require increased reliability in terms of lower switching losses, increased power factor, and low total harmonic distortion (THD) for ensuring robust and smooth operation. Selection of control strategy for MLIs is one of the important aspects while designing of MLI. SPWM (Sinusoidal pulse width modulation) technique has been selected and same is used in the proposed transformer less switch capacitor based MLIs. SPWM which is based on comparing the modulating and carrier signal for generating the switching pulses, is the fundamental switching and control strategy generally used in MLI control. The PWM method used to control the switching sequences of inverters is directly responsible for controlling the output waveforms of current and voltage, while defining the efficiency of the inverter by managing the switching losses and THD ratios. This paper proposes high efficient nine level, eleven level, thirteen level &amp; fifteen level switched capacitor-based inverter. Further total harmonic distortion for each level has been calculated using MATLAB simulation and the value observed for the same is compared for each level of MLI.
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Lakshmi, D., G. Jegadeeswari, and B. Kirubadurai. "Optimized Transformer-Less PV Inverter Design for Grid Operation Using Super Junction MOSFETs and SiC Diodes." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-9924-8.ch004.

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This paper presents a high-efficiency transformer-less single-phase sinusoidal pulse-width modulation (SP-SPWM) full-bridge photovoltaic (PV) inverter optimized for grid-connected applications. Traditional designs using super junction MOSFETs and SiC diodes face challenges due to reverse recovery in MOSFET body diodes, leading to switching losses and leakage currents. To overcome these issues, the proposed inverter reduces the free-rail voltage to half of the DC input during freewheeling, ensuring a stable common-mode voltage and significantly minimizing leakage current. Additionally, it eliminates switching time constraints, reducing waveform distortions at high frequencies and grid zero-crossing points. A 1 kW prototype was developed and tested, achieving an efficiency of 98.5%, surpassing the European benchmark of 98.32%. The experimental results demonstrate improved efficiency, lower leakage current, and enhanced reliability, making the proposed design a strong candidate for next-generation grid-connected PV systems.
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Ghosal, Sudipta Kr, and Jyotsna Kumar Mandal. "Genetic-Algorithm-Based Optimization of Fragile Watermarking in Discrete Hartley Transform Domain." In Handbook of Research on Natural Computing for Optimization Problems. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0058-2.ch005.

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In this chapter, a fragile watermarking scheme based on One-Dimensional Discrete Hartley Transform (1D-DHT) has been proposed to verify the authenticity of color images. One-Dimensional Discrete Hartley Transform (1D-DHT) converts each 1 x 2 sub-matrix of pixel components into transform domain. Watermark (along with a message digest MD) bits are embedded into the transformed components in varying proportion. To minimize the quality distortion, genetic algorithm (GA) based optimization is applied which yields the optimized component corresponding to each embedded component. Applying One-Dimensional Inverse Discrete Hartley Transform (1D-IDHT) on 1 x 2 sub-matrices of embedded components re-generates the pixel components in spatial domain. The reverse approach is followed by the recipient to retrieve back the watermark (along with the message digest MD) which in turn is compared against the re-computed Message Digest (MD') for authentication. Simulation results demonstrate that the proposed technique offers variable payload and less distortion as compared to existing schemes.
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Younes, Yousef, Lukas Galke, and Ansgar Scherp. "RADAr: A Transformer-Based Autoregressive Decoder Architecture for Hierarchical Text Classification." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2024. http://dx.doi.org/10.3233/faia240661.

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Recent approaches in hierarchical text classification (HTC) rely on the capabilities of a pre-trained transformer model and exploit the label semantics and a graph encoder for the label hierarchy. In this paper, we introduce an effective hierarchical text classifier RADAr (A Transformer-based Autoregressive Decoder Architecture) that is based only on an off-the-shelf RoBERTa transformer to process the input and a custom autoregressive decoder with two decoder layers for generating the classification output. Thus, unlike existing approaches for HTC, the encoder of RADAr has no explicit encoding of the label hierarchy and the decoder solely relies on the samples’ label sequences observed during training. We demonstrate on three benchmark datasets that RADAr achieves results competitive to the state of the art with less training and inference time. Our model consistently performs better when organizing the label sequences from children to parents versus the inverse, as done in existing HTC approaches. Our experiments show that neither the label semantics nor an explicit graph encoder for the hierarchy is needed. This has strong practical implications for HTC as the architecture has fewer requirements and provides a speed-up by a factor of 2 at inference time. Moreover, training a separate decoder from scratch in conjunction with fine-tuning the encoder allows future researchers and practitioners to exchange the encoder part as new models arise. The source code is available at https://github.com/yousef-younes/RADAr.
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Patra, Anirban, Arijit Saha, Debasish Chakraborty, and Kallol Bhattacharya. "Compression of High-Resolution Satellite Images Using Optical Image Processing." In Satellite Systems - Design, Modeling, Simulation and Analysis. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94147.

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This chapter presents a novel method for compressing satellite imagery using phase grating to facilitate the optimization of storage space and bandwidth in satellite communication. In this research work, each Satellite image is first modulated with high grating frequency in a fixed orientation. Due to this modulation, three spots (spectrum) have been generated. From these three spots, by applying Inverse Fourier Transform in any one band, we can recover the image. Out of these three spots, one is center spectrum spot and other spots represent two sidebands. Care should be taken during the spot selection is to avoid aliasing effect. At the receiving end, to recover image we use only one spectrum. We have proved that size of the extracted image is less than the original image. In this way, compression of satellite image has been performed. To measure quality of the output images, PSNR value has been calculated and compared this value with previous techniques. As high-resolution satellite image contains a lot of information, therefore to get detail information from extracted image, compression ratio should be as minimum as possible.
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Anilkumar, Munikrishnappa, Manasa Nagabhushanam, and Mallieswari R. "Topic Modelling of India’s Digital Healthcare Research Trend." In Applied Intelligence and Computing. Soft Computing Research Society, 2024. http://dx.doi.org/10.56155/978-81-955020-9-7-18.

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New advancements in information technology have had a tremendous impact on digital healthcare applications in the medical area. The study themes connected to digital healthcare technology and its intervention must be discovered and studied systematically. As a research gap, digital healthcare research in India has yet to be investigated thematically using topic modeling; in this context, the study employs topic modeling's Non-Negative Matrix Factorization algorithm to systematically generate digital health research themes in India. After preprocessing, the raw texts were transformed into Term Frequency-Inverse Document Frequency vectors. The Non-Negative Matrix Factorization approach from topic modeling was used for text classification. The k parameter was used for feature selection, yielding a set number of topics for semantic interpretation. Analysis of the research articles revealed that there has been considerable growth in digital healthcare research in India since 2017; the majority of publications occurred in 2020 and 2021, with less previous to 2017. Topic modeling of 97 published articles yielded the top three research themes: evaluation, public policy, and communities. The findings from the research themes will provide a thematic understanding of digital healthcare research in India. It will also aid future studies through text analysis, topic modeling, and decision-making in digital healthcare treatments.
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Diwaker, Ritesh, and Deepak Asrani. "Multimedia Security in Audio Signal." In Artificial intelligence and Multimedia Data Engineering. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815196443123010008.

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The security of Digital media has been varying continuously due to advanced malware attacks. Multimedia security has become one of the major concerns since new technologies are introduced. The proposed paper applied the watermarking technique in digital audio signals in which unique data is inserted in one-dimensional data in such a way that it must not affect the major information of the audio signal. The hybrid decomposition scheme has been applied to the audio data in order to extract features in terms of energy bands. The data is kept hidden in a low significant energy band that contains less information. This watermarking technique ensures the ownership of the multimedia data. Only authorized authors can be able to claim ownership of the audio data. The correct authorization of audio data can be proven by the extraction method in which the hidden watermark data has been extracted back to its original form without leaving any distortion in audio data. The proposed work introduces a hybrid approach to watermarking 2D data into an audio file. A hybrid audio decomposition technique was introduced by the proposed scheme in which a dual form of audio decomposition method has been applied containing Fast Fourier transform (FFT) and Cordic QR scheme. The correct location from the energy band has been found to embed the watermark data. Before the embedding procedure, the watermarking data has been selected. The proposed method selects an image containing information as a watermark that is first encrypted before initiating the embedding process. Watermark Encryption has been done using a cyclic coding algorithm and Arnold’s cat map. The disintegration of the audio file will finally result in Q and R matrices. Both such matrices are of orthogonal type. Then, the encrypted watermark data has been implanted in a random fashion in the R component of decomposed audio data during the embedding process. The inverse procedure has been applied for the watermark extraction and decryption process.
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Conference papers on the topic "Transformer Less Inverter"

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SharmilaDevi, B., M. P. Prasanna Venkatesh, S. Sulochini, T. Sudhakaran, and R. Srinithi. "Development of Solar Powered 21-Level Transformer-less Multilevel Inverter." In 2025 International Conference on Visual Analytics and Data Visualization (ICVADV). IEEE, 2025. https://doi.org/10.1109/icvadv63329.2025.10961607.

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2

Ravitheja, Rage, Karthik Thirumala, and Manoranjan Sahoo. "Single-phase Single-stage Transformer-less Common Ground-based Buck-boost Inverter." In 2024 IEEE 4th International Conference on Sustainable Energy and Future Electric Transportation (SEFET). IEEE, 2024. http://dx.doi.org/10.1109/sefet61574.2024.10718016.

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Ardashir, Jaber Fallah, Aydin Mohammad Ogly, Hadi Vatankhah Ghadim, Mitra Sarhangzadeh, Hossein Khoun Jahan Azarbaijan та Amin Mohammadpour Shotorbani. "A 1-Source 3- φ Boost Transformer-less Multilevel Inverter without Leakage Current". У 2024 9th International Conference on Technology and Energy Management (ICTEM). IEEE, 2024. http://dx.doi.org/10.1109/ictem60690.2024.10631963.

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4

Xu, Yunfeng, Weimin Wu, Houqing Wang, Frede Blaabjerg, Mohamed Orabi, and Liang Yuan. "A Novel Transformer-less Buck-Boost Inverter with Coupled Inductor for Photovoltaic Systems." In 2024 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2024. https://doi.org/10.1109/ecce55643.2024.10861303.

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5

Khetle, Sushant, Ganesh Jadhav, Baljot Kaur Sudan, Trupti Gajare, and Mini Rajeev. "Closed Loop operation of Transformer-less Inverter in Voltage and Current Control mode." In 2024 IEEE 1st International Conference on Green Industrial Electronics and Sustainable Technologies (GIEST). IEEE, 2024. https://doi.org/10.1109/giest62955.2024.10960198.

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Ahmed, Istiak, Irfan Rahman, Syed Saad Aslam, Ferdous S. Azad, Md Samsul Alam, and Md Abdur Razzak. "Design and Analysis of a Transformer-less Solar Powered Quadratic Boost Converter based Grid Tie Inverter." In 2024 11th International Conference on Power and Energy Systems Engineering (CPESE). IEEE, 2024. https://doi.org/10.1109/cpese62584.2024.10840691.

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7

Crescimbini, F., A. Lidozzi, E. Rovelli, A. Salvadore, and L. Solero. "A 30kW transformer-less PV NPC inverter." In 2012 EPE-ECCE Europe Congress. IEEE, 2012. http://dx.doi.org/10.1109/epepemc.2012.6397301.

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8

Zhou, Liwei, and Matthias Preindl. "Three-Phase Transformer-less Hybrid-Bypass Inverter." In 2019 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2019. http://dx.doi.org/10.1109/ecce.2019.8912939.

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9

Bagawade, Snehal, and Luis Zubieta. "Transformer-less Split-Phase Neutral Grounded Inverter." In 2024 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2024. http://dx.doi.org/10.1109/apec48139.2024.10509168.

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10

Senanayake, Silumin, Thilak Senanayake, Jun Imaoka, and Masayoshi Yamamoto. "High reliable transformer-less deadtime less Inverter for Grid-connected Applications." In 2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia). IEEE, 2023. http://dx.doi.org/10.23919/icpe2023-ecceasia54778.2023.10213921.

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