Results 261 to 270 of about 8,844,154 (290)
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IEEE 36th Conference on Power Electronics Specialists, 2005., 2006
This paper presents a practical approach to eliminating both bearing current and ground leakage current from an inverter-driven motor rated at 400 V and 3.7 kW. When the shaft voltage with respect to the motor frame exceeds the dielectric breakdown voltage of thin lubricating grease films in two metal bearings at the drive and non-drive ends, an ...
Hirofumi Akagi, Shunsuke Tamura
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This paper presents a practical approach to eliminating both bearing current and ground leakage current from an inverter-driven motor rated at 400 V and 3.7 kW. When the shaft voltage with respect to the motor frame exceeds the dielectric breakdown voltage of thin lubricating grease films in two metal bearings at the drive and non-drive ends, an ...
Hirofumi Akagi, Shunsuke Tamura
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2021 International Conference on Communication, Control and Information Sciences (ICCISc), 2021
Single-phase grid-connected Transformer-Less inverters are widely used to connect solar PV systems to the utility grid. A new topology for high gain Transformer-Less inverter for grid connected systems has been proposed in the paper. It consists of six power switches, two inductors, two diodes, two capacitors and a filter at the inverter output level ...
Uday Karthikeyan Reddy B +2 more
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Single-phase grid-connected Transformer-Less inverters are widely used to connect solar PV systems to the utility grid. A new topology for high gain Transformer-Less inverter for grid connected systems has been proposed in the paper. It consists of six power switches, two inductors, two diodes, two capacitors and a filter at the inverter output level ...
Uday Karthikeyan Reddy B +2 more
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2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018
This paper proposes a cascaded paralleled-buck converter applied to transformerless photovoltaic (PV) system. The main problem in transformerless applications is the leakage current. So, in a cascaded converter it is necessary to minimize the leakage current in both cells. The high frequency model of the proposed topology is presented to understand the
Vagner Fonseca Nobrega +1 more
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This paper proposes a cascaded paralleled-buck converter applied to transformerless photovoltaic (PV) system. The main problem in transformerless applications is the leakage current. So, in a cascaded converter it is necessary to minimize the leakage current in both cells. The high frequency model of the proposed topology is presented to understand the
Vagner Fonseca Nobrega +1 more
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Advanced ioff measureable MOSFET array with eliminating leakage current of peripheral circuits
2016 International Conference on Microelectronic Test Structures (ICMTS), 2016A Novel Ioff measurable MOSFET array has been developed. Body bias of peripheral circuit is controlled in order to eliminate the unwanted leakage current in peripheral circuit. SPICE simulation results indicate 10−14A or less of Ioff can be measured, and it is demonstrated that around 10−12A of Ioff can be measured directly without any additional ...
Tsuyoshi Suzuki +7 more
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2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015
The transformerless inverters are widely employed in grid-tied PV systems, since they feature higher efficiency and lower cost compared with the transformer based inverters. One of the critical problems for transformerless inverters is the common-mode leakage current issue, which leads to serious safety and EMI problems. This paper proposed an enhanced
Wuhua Li, Xiangning He, Chenming Li
exaly +2 more sources
The transformerless inverters are widely employed in grid-tied PV systems, since they feature higher efficiency and lower cost compared with the transformer based inverters. One of the critical problems for transformerless inverters is the common-mode leakage current issue, which leads to serious safety and EMI problems. This paper proposed an enhanced
Wuhua Li, Xiangning He, Chenming Li
exaly +2 more sources
Leakage Current Elimination PWM Method for Fault-Tolerant String H-NPC PV Inverter
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019Fault tolerant (FT) operation in photovoltaic (PV) inverters is gaining increased attention in order to improve system availability. Conventional string PV inverters lack the ability to eliminate the leakage currents of the system during fault modes of operation.
Mokhtar Aly +3 more
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7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014), 2014
Transformerless PV inverters are most preferred for grid connected photovoltaic (PV) generation system due to higher efficiency and lower cost. However, to meet the safety regulations, the leakage current, which deteriorates the power quality and generates EMI of transformerless PV inverter, have to be addressed carefully.
M. Islam, F.M. Albatsh, S. Mekhilef
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Transformerless PV inverters are most preferred for grid connected photovoltaic (PV) generation system due to higher efficiency and lower cost. However, to meet the safety regulations, the leakage current, which deteriorates the power quality and generates EMI of transformerless PV inverter, have to be addressed carefully.
M. Islam, F.M. Albatsh, S. Mekhilef
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2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, 2014
Nowadays transformerless PV converters are widely used in the energy conversion stage of a PV plant, because their good characteristics regarding efficiency, size, cost and weight. The main problem in transformerless PV systems is the common mode voltage variations that can generate leakage ground currents through the parasitic capacitance formed ...
Hao Huang, Wenjie Chen, Xiaomei Song
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Nowadays transformerless PV converters are widely used in the energy conversion stage of a PV plant, because their good characteristics regarding efficiency, size, cost and weight. The main problem in transformerless PV systems is the common mode voltage variations that can generate leakage ground currents through the parasitic capacitance formed ...
Hao Huang, Wenjie Chen, Xiaomei Song
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2016 7th Power Electronics and Drive Systems Technologies Conference (PEDSTC), 2016
A family of single phase converters with reduced number of components is introduced in this paper. There are two switches, one coupled inductors and one capacitor in their structure, therefore the cost is reduced considerably. The proposed converters can be used as four quadrant DC/DC converter when fixed duty cycle (D) is applied to switches.
Masoumeh Adham Haghighpour +3 more
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A family of single phase converters with reduced number of components is introduced in this paper. There are two switches, one coupled inductors and one capacitor in their structure, therefore the cost is reduced considerably. The proposed converters can be used as four quadrant DC/DC converter when fixed duty cycle (D) is applied to switches.
Masoumeh Adham Haghighpour +3 more
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International Journal of Circuit Theory and Applications, 2019
SummaryIn this paper, a single‐phase single‐stage soft‐switching transformer‐less grid‐tied common mode inverter is proposed, which is useful for injection of power from the photovoltaic (PV) panels to the grid. One of the output ports of the PV panel in the proposed topology can be connected directly to the neutral point of the grid to eliminate the ...
Mehdi Tofigh Azary +2 more
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SummaryIn this paper, a single‐phase single‐stage soft‐switching transformer‐less grid‐tied common mode inverter is proposed, which is useful for injection of power from the photovoltaic (PV) panels to the grid. One of the output ports of the PV panel in the proposed topology can be connected directly to the neutral point of the grid to eliminate the ...
Mehdi Tofigh Azary +2 more
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