The new topology in Flying Capacitor Multilevel Inverter

Maheshkumar, N.; Maheskumar, V.; Divya, M.

doi:10.1109/iccci.2013.6466268

Cited by 20 publications

(2 citation statements)

References 6 publications

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“…These days, multilevel inverters are mainly devised for high‐voltage DC‐to‐AC applications because of higher‐voltage operating capability, lower d v /d t and better harmonic performance [1–3]. There are three commercial topologies of multilevel voltage source inverters [4–8]: cascaded H‐bridge (CHB), neutral point clamped (NPC) and capacitor clamp (CC). Among them, the CHB topology [4, 9] enables to reach a much higher output voltage with low‐voltage DC‐sources such as photovoltaic and fuel cells as well as to have a high number of output voltage levels, resulting in a no step‐up transformer and much smaller scale filter.…”

Section: Introductionmentioning

confidence: 99%

Novel carrier‐based hybrid pulse width modulation method for cascaded capacitor‐clamp multilevel inverter

Kim

Choi

Park

2014

IET Power Electronics

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This study presents a new carrier-based hybrid pulse width modulation (PWM) Method for the cascaded capacitorclamp multilevel inverter (CCCMLI), which combines the benefits of a new alternative level-shifted carrier PWM and a phase-shifted carrier PWM. For modulating the CCCMLI, the phase disposition sub-harmonic PWM was first proposed, but does not show good performances in an even load sharing between inverter cells connected in series, flying-capacitor voltage balancing and output waveform quality. On the other hand, a proposed PWM method enables to achieve a balanced load sharing between cascaded cells even at low amplitude modulation indices as well as the excellent voltage balancing control of the flying-capacitors with a much smaller voltage ripple and the good harmonic characteristics in output waveforms. The proposed modulation is verified through both simulation and field-programmable gate array (FPGA) based experimental results.

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Section: Introductionmentioning

confidence: 99%

Novel carrier‐based hybrid pulse width modulation method for cascaded capacitor‐clamp multilevel inverter

Kim

Choi

Park

2014

IET Power Electronics

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“…The concept of multilevel inverters was first introduced in 1975 [1]. Basic types of multilevel inverters are the Cascaded H-bridge (CHB) multilevel inverter [2] [3], the Flying Capacitor (FC) multilevel inverter [4] and the Neutral Point Clamped (NPC) multilevel inverter [5]. Based on the value of dc sources we can classify inverter topology as symmetric if all the dc sources are equal in value and asymmetric if dc sources are having different values.…”

Section: Introductionmentioning

confidence: 99%

New hybrid cascade multilevel inverter with less number of switches

Singh

Gupta

Pattnaik

et al. 2014

2014 6th IEEE Power India International Conference (PIICON)

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Multilevel Inverters (MLI) is generally employed to synthesis a desired voltage waveform.The power quality of multilevel inverter is improved as the number of levels increases at the output. However, it causes to the increasing number of switching devices and dc voltage sources, and increases the cost and control complexity and tends to reduce the overall reliability and efficiency. In this paper a new topology of Hybrid Cascade Multilevel inverter (HCMLI) is proposed to improve the multilevel inverter performance by compensating these disadvantages. This topology has less number of power switches compared to that of conventional multilevel inverters. The proposed new structure consists of two parts one is basic module and another one is H-Bridge. Basic module is used to produce all positive output levels, and negative and zero levels are achieved by H-Bridge. Asymmetric configuration of MLI will result the higher numbers of steps with the same number of switches as symmetric configuration of MLI. MATLAB/Simulink environment is used to simulate and validate the results of Symmetric and Asymmetric proposed HCMLI for 11 level and 19 levels respectively. keywords: Multilevel Inverter, Symmetric MLI, Asymmetric MLI, THD, CHB.I.

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