Estimation and Analysis of Power Loss in a Reduced Switches Count H-Bridge Multilevel Inverter

Kahwa, Almachius; Obara, Hidemine; Fujimoto, Yasutaka

doi:10.1109/icmech.2019.8722859

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…This is due to the current peaks that occur during the discontinuity period. The equations employed for calculating conduction and switching losses are derived from the articles in reference [37], [38], with necessary adjustments made to suit this topology. The percentage division of conduction and switching losses of semiconductors in MOSFET'S is: switching losses (P swiS ): 19% and conduction losses (P conS ): 81%, in Diodes is: switching losses (P swiD ): 28% and conduction losses (P conD ): 72%.…”

Section: Semiconductorsmentioning

confidence: 99%

Single-Phase Voltage-Doubler High-Power-Factor Ćuk Rectifier Operating in Discontinuous Conduction Mode

Mezaroba,

Font,

Lazzarin

2024

IEEE Open J. Ind. Electron. Soc.

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This paper provides a comprehensive analysis, including static, dynamic, and experimental validation, of a voltage-doubler Ćuk rectifier operating in the discontinuous conduction mode (DCM) for singlephase applications. The proposed topology integrates two classic Ćuk rectifiers through a three-position switch, allowing for either a doubled output voltage or reduced voltage efforts compared to the conventional topology. The voltage gain is increased while maintaining the step-up/step-down characteristic of the Ćuk family and power components are activated only in a half-cycle of the electrical grid, thus reducing the current efforts in the semiconductors. These features make the Ćuk converter suitable for higher voltage applications. The proposed topology is analyzed in DCM, where a high power factor is naturally achieved without a current control loop. An experimental prototype of 1 kW is built to verify the theoretical analysis, and the results show an efficiency of 94.68% with an input current THD of 1.86% ate rated power, including an output voltage control loop. Furthermore, the proposed topology is compared to the conventional Ćuk rectifier, both operating in DCM and with power factor correction (PFC).

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Section: Semiconductorsmentioning

confidence: 99%

Single-Phase Voltage-Doubler High-Power-Factor Ćuk Rectifier Operating in Discontinuous Conduction Mode

Mezaroba,

Font,

Lazzarin

2024

IEEE Open J. Ind. Electron. Soc.

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“…A 9-level and 49-level multilevel inverter is proposed and simulated [26]. The basic structure consists of two voltage sources and five switches.…”

Section: Survey On Mlirs Designsmentioning

confidence: 99%

“…The basic structure consists of two voltage sources and five switches. The harmonic distortion achieved for a 9-level inverter is 9.85% and for a 49-level inverter is 2.01%, it is found that increase in output voltage levels leads to reduction in harmonic content at the load [26]. A 'T' type multilevel inverter is proposed for transformer less DVR with reduced switches.…”

Section: Survey On Mlirs Designsmentioning

confidence: 99%

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Trends and Challenges in Multi-Level Inverter with Reduced Switches

et al. 2021

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Multilevel inverter had been paid a lot of attention from the academia and research community in recent times due to its role in high and medium power applications. In this paper, a detailed survey is made on the recently designed multilevel inverter to find the suitability of the inverters for particular applications. Research is performed on various types of multilevel inverters such as: Symmetric, asymmetric, hybrid and modularized multilevel inverter in order to identify the issues in generating more levels at the output. A summary of various issues in multilevel inverter with reduced switch count is provided, so that a novel topology of multilevel inverter can be designed in future. Further, an 81-level switched ladder multilevel inverter using unidirectional and bidirectional switches is designed. Simulation work is carried out using Matlab/Simulink in order to validate the performance of the inverter with change in resistive load and impedance load. The output of the 81-level inverter is fed to a 110 V, 186.5 W single phase induction motor in order to study the characteristics, further speed control of motor is performed by varying the input voltage of the motor and the results are presented.

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“…For diodes, it is termed as reverse recovery energy (E rec ). The switching loss is proportional to the blocking voltage of the switching devices as well [38], [39], [41]. Non-zero currents are flowing through the switching devices during their OFF-state periods, causing OFF-state power loss.…”

Section: Power Losses and Efficiency Analysismentioning

confidence: 99%

Four-Level Three-Phase Inverter With Reduced Component Count for Low and Medium Voltage Applications

2021

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This paper proposes a novel three-phase topology with a reduced component count for lowand medium-voltage systems. It requires three bidirectional switches and twelve unidirectional switches for producing four-level voltages without using flying capacitors or clamping diodes, reducing the size, cost, and losses. Removing flying capacitors and clamping diodes allows it to simplify control algorithms and increase the reliability, efficiency, and lifetime. A modified low-frequency modulation (LFM) scheme is developed and implemented on the proposed topology to produce a staircase voltage with four steps. Further, a level-shifted pulse width modulation (LSPWM) is used to reduce the filter size and increase the output voltage controllability. In this study, a voltage balancing control algorithm is executed to balance the DC-link capacitor voltages. The performance of the proposed topology is numerically demonstrated and experimentally validated on an in-house test setup. Within the framework, the power loss distribution in switches and conversion efficiency of the proposed circuit are studied, and its main features are highlighted through a comparative study.INDEX TERMS DC-AC converters, four-level inverters, low and medium voltage applications, multilevel inverters, three-phase inverters.

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Estimation and Analysis of Power Loss in a Reduced Switches Count H-Bridge Multilevel Inverter

Cited by 8 publications

References 10 publications

Single-Phase Voltage-Doubler High-Power-Factor Ćuk Rectifier Operating in Discontinuous Conduction Mode

Single-Phase Voltage-Doubler High-Power-Factor Ćuk Rectifier Operating in Discontinuous Conduction Mode

Trends and Challenges in Multi-Level Inverter with Reduced Switches

Four-Level Three-Phase Inverter With Reduced Component Count for Low and Medium Voltage Applications

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