Results 151 to 160 of about 284 (183)
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Experimental verification of loss reduction in diode-clamped multilevel inverters
2011 IEEE Energy Conversion Congress and Exposition, 2011Recently, power converters with lower power loss and lower electromagnetic interference (EMI) are required in many applications. To satisfy these requirements, diode-clamped multilevel inverters are investigated. In this case, the voltage balancing circuit must be connected to the DC capacitors because the DC voltages tend to unbalance when the number ...
Yukihiko Sato, Takumi Ito
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Diode Clamped Three Level Inverter Using Sinusoidal PWM
2012 International Conference on Communication Systems and Network Technologies, 2012An inverter is a circuit which converts dc power into ac power at desired output voltage and frequency. The a.c. output voltage can be fixed at a fixed or variable frequency. This conversion can be achieved by controlled turn ON & turn OFF or by forced commutated thyristors depending on applications.
Piyush P. Gajbhiye, N.J. Phadkule
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A new multilevel inverter model NP without clamping diodes
2008 34th Annual Conference of IEEE Industrial Electronics, 2008This paper deals with a novel multilevel inverter neutral point (MNP). This system consists of a series of monodirectional and bidirectional switch. If one or several bidirectional power switches of this inverter burn out or to become ruined by reason an over voltage or depreciation, it stays in the previous level. Indeed, for a three-level NP to occur
Tehrani, Kambiz +3 more
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A novel multilevel inverter topology with no clamping diodes and flying capacitors
2008 34th Annual Conference of IEEE Industrial Electronics, 2008To decrease the number of clamping diodes and flying capacitors in multilevel inverters, a novel multilevel inverter topology with no clamping diodes and flying capacitors is proposed in the paper. The topology structure, operating principle, balance of the DC link capacitor voltages, and comparisons with the conventional multilevel topologies will be ...
null Alian Chen +3 more
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Experimental and simulation analysis for the 5-level diode clamped inverter
2015 4th International Conference on Electric Power and Energy Conversion Systems (EPECS), 2015This paper investigates the performance of the multilevel, (5-level), diode clamped inverter in terms of the magnitude of the output voltage and harmonic spectrum of its output. This paper presents simulation results for the output voltage and how it can be controlled to get variable output voltage.
A. T. Al Sakhen +3 more
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A closed-loop voltage balance method for five-level diode-clamped inverters
IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017Voltage deviations of dc-link capacitors are the main problem of multilevel diode-clamped converters (DCC). In this paper, a novel carrier-based voltage balance method is proposed to balance the dc-link capacitors of five-level DCCs. The proposed method is characterized by injecting proper zero-sequence voltages in the modulation signals of carrier ...
Dongdong Cui +3 more
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MULTI-WINDING TRANSFORMER-BASED DIODE CLAMPING MULTILEVEL INVERTER, EXPERIMENTAL RESULTS
Journal of Circuits, Systems and Computers, 2013The feasibility of a staircase-output, diode clamping multilevel inverter based on multiwinding transformer is investigated through experimental results including: output voltage and current waveforms under resistive and inductive loads and the THD. The 2.5 kW, 7-level prototype of the constructed configuration proves the ability to act as an inverter
Ehsan Esfandiari +2 more
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Reducing Number of Switches in Multilevel Inverter Using Diode Clamped and H-Bridge Inverters
2020The multilevel inverters (MLI) are having more features to usage. In existing methods like diode clamped MLI and H-Bridge MLI, more number of switches are using compared to proposed MLI. So, a new method of 35-level MLI topology is a combination of diode clamped and cascaded multilevel inverters.
Karanam Deepak +3 more
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A Natural DC-Link Voltage Balancing of Diode-Clamped Inverters in Parallel Systems
IEEE Transactions on Industrial Electronics, 2013This paper presents a method of natural dc-link capacitor voltage balancing of three- and single-phase neutral-point-clamped (NPC) inverters working in parallel configurations. It is proven that, in such parallel systems, when the inverters are insulated, the conditions for natural balancing can be achieved, and the application of a balancing circuit ...
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Multilevel inverter with active clamping diodes for energy efficiency improvement
RE&PQJMultilevel inverterMultilevel inverters can replace commonly used two-level inverters for three-phase electrical drives. In this low voltage range new wide-bandgap power switches (SiC MOSFET, GaN FET) are available. In the four-, five- and seven level inverters, the majority of the power losses are caused by the threshold voltage of the clamping diodes.
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