The Experts below are selected from a list of 89784 Experts worldwide ranked by ideXlab platform
Atsuo Kawamura - One of the best experts on this subject based on the ideXlab platform.
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Buck/Boost DC–DC Converter Topology With Soft Switching in the Whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter topology with soft switching in the whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
European Conference on Cognitive Ergonomics, 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
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Buck/boost Dc-Dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
Giuseppe Guidi - One of the best experts on this subject based on the ideXlab platform.
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Buck/Boost DC–DC Converter Topology With Soft Switching in the Whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter topology with soft switching in the whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
European Conference on Cognitive Ergonomics, 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
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Buck/boost Dc-Dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
Martin Pavlovsky - One of the best experts on this subject based on the ideXlab platform.
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Buck/Boost DC–DC Converter Topology With Soft Switching in the Whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter topology with soft switching in the whole Operating Region
IEEE Transactions on Power Electronics, 2014Co-Authors: Martin Pavlovsky, Giuseppe Guidi, Atsuo KawamuraAbstract:This paper proposes a buck/boost dc-dc converter topology based on the principle of auxiliary resonant commutated pole. The used snubber is fairly simple yet effective in reducing the switching losses. All active devices operate with soft switching, and switching noise is suppressed as much as possible. In addition to the conventional active switch loss reduction, the snubber participates in suppression of output diode reverse recovery. Moreover, complete soft switching in the whole Operating Region is achieved through controlled extended reverse conduction of synchronous rectifier. The topology was implemented in a 14 kW converter prototype Operating at 62.5 kHz and tested with complete closed-loop control. Experimental efficiencies in the range of 98.5% show that the proposed circuit is highly capable while remaining sufficiently simple.
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buck boost dc dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
European Conference on Cognitive Ergonomics, 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
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Buck/boost Dc-Dc converter with simple auxiliary snubber and complete soft switching in whole Operating Region
2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012Co-Authors: Martin Pavlovsky, Atsuo Kawamura, Giuseppe GuidiAbstract:The paper proposes a buck/boost dc-dc converter topology based on a simple auxiliary snubber. The snubber is simple yet effective in reducing the switching losses. In addition to the conventional active switch loss reduction, the snubber can participate in suppression of output diode reverse recovery through synchronous rectifications and it can also be used to provide complete soft switching in the whole Operating Region through extended conduction of synchronous rectifier. Experimental efficiencies in the range of 98.5 % show that the proposed circuit is highly capable while remaining simple.
Deepa Kundur - One of the best experts on this subject based on the ideXlab platform.
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secure Operating Region simplification in dynamic security assessment
International Conference on Smart Grid Communications, 2015Co-Authors: Dongchan Lee, Pirathayini Srikantha, Deepa KundurAbstract:Secure Operating Regions are utilized by system operators to define system limits and rapidly assess the state of the power grid. Dynamic Security Assessment produces a set of power system limit points that are then used to construct the secure Operating Region. This data set is typically large for a complex power system, and processing these in a timely manner becomes difficult. In this paper, we propose novel techniques to efficiently automate the computation of the secure Operating Region. The algorithm reduces the size of the limit point data set and simplifies the Operating Region constraints while retaining maximal secure operation Region. Our algorithm can be used in off-line studies for compressing a large limit point data set with minimal information loss. It can also be applied to on-line studies in which processing efficiency is critical. Our algorithm was applied to identify voltage and transient secure Operating Regions on a IEEE 39 bus system.
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SmartGridComm - Secure Operating Region simplification in dynamic security assessment
2015 IEEE International Conference on Smart Grid Communications (SmartGridComm), 2015Co-Authors: Dongchan Lee, Pirathayini Srikantha, Deepa KundurAbstract:Secure Operating Regions are utilized by system operators to define system limits and rapidly assess the state of the power grid. Dynamic Security Assessment produces a set of power system limit points that are then used to construct the secure Operating Region. This data set is typically large for a complex power system, and processing these in a timely manner becomes difficult. In this paper, we propose novel techniques to efficiently automate the computation of the secure Operating Region. The algorithm reduces the size of the limit point data set and simplifies the Operating Region constraints while retaining maximal secure operation Region. Our algorithm can be used in off-line studies for compressing a large limit point data set with minimal information loss. It can also be applied to on-line studies in which processing efficiency is critical. Our algorithm was applied to identify voltage and transient secure Operating Regions on a IEEE 39 bus system.
John Hauser - One of the best experts on this subject based on the ideXlab platform.
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Optimal trajectory tracking control for wind turbines during Operating Region transitions
2013 American Control Conference, 2013Co-Authors: John HauserAbstract:Control systems for wind turbines have become an active area of research over the past decade as the wind industry has grown and more turbines are installed. Properly sited turbines experience many transitions between below rated operation, where the goal is to extract maximum energy from the wind, and rated speed operation, where the goal is to regulate the power capture to the rated power of the turbine. Many of the largest structural loads are induced during the transition between these Operating Regions. This paper focuses on using preview wind speed measurements to schedule, optimize, and track a desired trajectory of the wind turbine states and inputs during Region transitions between below-rated and above-rated operation. The goal of this control system is to reduce the structural loading on the turbine components through smoother Region transitions. The wind speed preview measurements are used to generate an initial desired trajectory of the turbine. This trajectory is optimized by finding a regulation trajectory that lies on the turbine trajectory manifold which is close to the desired trajectory in a weighted L2 sense. The regulation trajectory is then used as a reference for a time-varying linear quadratic optimal controller.
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ACC - Optimal trajectory tracking control for wind turbines during Operating Region transitions
2013 American Control Conference, 2013Co-Authors: Jacob Aho, Lucy Y. Pao, John HauserAbstract:Control systems for wind turbines have become an active area of research over the past decade as the wind industry has grown and more turbines are installed. Properly sited turbines experience many transitions between below rated operation, where the goal is to extract maximum energy from the wind, and rated speed operation, where the goal is to regulate the power capture to the rated power of the turbine. Many of the largest structural loads are induced during the transition between these Operating Regions. This paper focuses on using preview wind speed measurements to schedule, optimize, and track a desired trajectory of the wind turbine states and inputs during Region transitions between below-rated and above-rated operation. The goal of this control system is to reduce the structural loading on the turbine components through smoother Region transitions. The wind speed preview measurements are used to generate an initial desired trajectory of the turbine. This trajectory is optimized by finding a regulation trajectory that lies on the turbine trajectory manifold which is close to the desired trajectory in a weighted L2 sense. The regulation trajectory is then used as a reference for a time-varying linear quadratic optimal controller.
