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Ultra sparse matrix converter(USMC) is a derived form of Indirect matrix converter(IMC) having less no of switches. Though it has unidirectional power flow capability it is very useful for specific applications such as wind energy systems, electrohydrostatic actuator, variable speed drives etc. However its main limitation is lower gain for which various control strategies and topological changes had...
This paper presents a three-phase single-stage bidirectional isolated matrix based AC-DC converter for energy storage. The matrix (3 × 1) topology directly converts the three-phase line voltages into high-frequency AC voltage which is subsequently, processed using a high-frequency transformer followed by a controlled rectifier. A modified Space Vector Modulation (SVM) based switching scheme is proposed...
This paper proposes a digitally controlled bipolar converter for dc micro grids. The bipolar converter configuration is based on the combination of SEPIC and CUK converter with the modifications in both the converters. In the proposed bipolar converter, the equivalent series resistance (ESR) of the transfer floating capacitor is increased by inserting a series resistance in the both SEPIC and CUK...
Matrix converters became very popular over AC-DC-AC converters for AC to AC conversion because of their beauty having no dc link capacitor. The gain of these converter can be varied only in the range of 0–86.6% of input voltage. This restricts its operation in high voltage application and also in grid integration. To enhance the boosting capability beyond the earlier one, this paper implements a switched...
Generating DC and AC voltage from a single DC input, through single stage conversion is cardinal for nanogrid applications. A boost derived hybrid converter is one of the topology used for nanogrid application, which works well in continuous mode of operation rendering both the dc and ac load simultaneously. Despite of this converters successful performance in continuous conduction mode, undesirable...
This paper brings forward a hybrid converter derived from the Split-Pi converter, which can provide simultaneous ac as well as dc outputs from the same dc input. The proposed converter can work both as a step up and step down converter, whereas most of the available hybrid topologies work in step up mode only. The inbuilt property of shoot through protection in inversion stage, makes this converter...
A constant-gm, rail-to-rail operational amplifier circuit topology is presented in this paper. The amplifier input stage is realized using single NMOS pair at 0.13μm bulk-CMOS process technology. The overall gain variation is within the range of ±2.338% for the rail-to-rail common mode input range. The proposed design is able to reject the common mode input response with 115dB of common mode rejection...
High voltage conversion ratio converter is required in broad range of applications such as microgrid, hybrid electrical vehicles, telecommunication and medical equipments. The control-to-output transfer function of a conventional quadratic boost converter reveals that right half plane (RHP) zero exist, which makes the controller design difficult. The device has to operate on extremely high duty cycle...
Potential of bidirectional Split-Pi converter is yet to be exploited. Its unique features like bidirectional property, option to employ in multiphase systems and smaller ratings of passive elements provides liberty to use it in applications demanding high power density such as in hybrid electric vehicles, renewable energy, aerospace, military etc. In this paper dynamic model of Split-Pi converter...
A modular high step up quadratic boost topology with minimum phase behavior for microsource applications is proposed in this paper. The proposed topology is modular as it is capable of accepting both DC as well as high frequency AC supply generated by microsurces such as solar cell modules and wind turbines etc. In the proposed topology the right half plane (RHP) zero gets completely eliminated for...
This paper addresses design issues involved in development of high voltage DC-DC converters such as optimizing isolation transformer parameters (leakage, proximity and Skin Effect), Power MOSFET losses and achieving tight voltage regulation (0.1%) used in Transmit Receive Multi Modules (TRMM). A modified transformer interleaving winding technique is implemented to reduce Skin, Proximity and leakage...
Fission yeast and budding yeast are the two distantly related species with common ancestors. Various studies have shown significant differences in metabolic networks and regulatory networks. Cell cycle regulatory proteins in both species have differences in structural as well as in functional organization. Orthologous proteins in cell cycle regulatory protein networks seem to play contemporary role...
A comparative study of CMOS-CFA is presented in this paper. By employing a second-generation positive current conveyor cascaded with amplifier followed by a buffer the design circumvents the problem of large transimpedance and high output impedance in a low voltage environment. It is observed that the reported configuration also results the near gain independent closed loop BW controlled by single...
Increase in processor speeds and recent advancements in processor performance through developments such as multi-core processing and simultaneous multi-threading (SMT) have resulted in a need for faster processor interconnect technology. The Intel® QuickPath Interconnect (QPI) is a high-speed, packetized, point-to-point interconnect used in Intel's next generation of microprocessors. Compared to its...
Tri-band BSF working at C, Ku and K band has been developed using a single topology. The designed 3-in-1 filter posses compactness, wider bandwidth, and low insertion loss. The proposed topology is constructed using spurline filter at the output connected with a section of anti-coupled lines. The filter with the presented approach can be used to shift the frequency at the desired location by optimizing...
In this article, design and development of band pass filter at X-band with the FBW of ~ 4% on silicon substrate has been presented using the dual-behavior resonator (DBR) approach. The proposed topology uses single section coupled lines to maintain the compactness and can be easily realizable with the standard microwave integrated circuit fabrication techniques. The designed filter shows high selectivity...
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