A new hybrid flying capacitor–based single‐phase nine‐level inverter

Tirupathi, Abhilash; Kirubakaran, A.; Tirumala, Somasekhar Veeramraju

doi:10.1002/2050-7038.12139

Cited by 26 publications

(27 citation statements)

References 30 publications

(60 reference statements)

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“…Furthermore, they offer a lower magnitude of dv/dt, and less stress on switching devices in comparison with two-level converters. [1][2][3] Accordingly, any technical and economic advance in this era is of interest.…”

Section: Introductionmentioning

confidence: 99%

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

Sabour

Nazarpour

Golshannavaz

et al. 2020

Int Trans Electr Energ Syst

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Summary This paper presents a new structure for a quasi‐resonant switched capacitor multilevel inverter. This structure offers multiple features of the conventional multilevel structures. Moreover, regarding the provided output voltage levels, the proposed structure exploits a new quasi‐resonant basic module which helps to diminish circuit cost and complexity using fewer power components. In the proposed structure, the balancing of capacitors voltages is achieved by series and parallel connection with the voltage source and without the need to employ a complicated control system. In order to obtain higher voltage levels at the inverter ac side, a developed H‐bridge is used in which the basic module is extended horizontally in separate cells on either side. Through a quasi‐resonant inductor deployment in the basic module, current spikes of capacitors are filtered which overwhelms decreasing of capacitor value and also lengthening the capacitor lifetime besides decreasing electromagnetic interference (EMI). Coupled with extensive simulation studies, experimental analyses are conducted to validate the performance of the proposed 17‐level inverter.

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Section: Introductionmentioning

confidence: 99%

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

Sabour

Nazarpour

Golshannavaz

et al. 2020

Int Trans Electr Energ Syst

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“…However, it demands more independent DC sources for higher voltage levels. Therefore, in the recent literature, [7][8][9][10][11][12][13][14][15] several new MLI topologies are reported with a reduced component count, novel voltage balancing methods, and the reduced number of independent DC sources in comparison with the aforesaid conventional topologies. The topology proposed in Babaei et al 7 can produce a seven-level output with reduced component count as compared with CHB, but it has no common DC-link to operate for three phases.…”

Section: Introductionmentioning

confidence: 99%

A three‐phase inverter circuit using half‐bridge cells and T‐NPC for medium‐voltage applications

Tirupathi

Kirubakaran

Tirumala

2020

Circuit Theory & Apps

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Three-phase single DC-source based multilevel inverter topologies play a pivotal role in industrial applications due to the reduced number of components and higher efficiency. This paper emphasizes the inverter for medium-voltage applications that employ a conventional three-phase T-type structure (T-NPC). The primary circuit of the proposed configuration consists of a T-NPC structure connected to the half-bridge cells at the top and the bottom sides of each phase. The secondary circuit consists of DC-link capacitors whose voltage balancing is attained through a separate voltage balancing circuit (VBC). Using the proposed configuration, the number of components and independent DC supplies are reduced compared with the conventional topologies such as a neutral point clamped (NPC) inverter, a flying capacitor (FC) inverter, and a cascaded H-bridge (CHB) inverter for the same number of output voltage levels. Hence, the proposed topology results in the reduction of weight, volume, and power losses of the inverter. A sine-triangle comparison method is employed in the field programmable gate array (FPGA) platform to generate the firing pulses of the circuit switches. The effectiveness of the proposed topology is verified with simulation studies and is experimentally validated with a scaleddown prototype.

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“…The DC nature of power from the PV panel is required to be converted into AC power to meet the domestic and industrial power needs. For this, power inverters play a significant role [1][2][3][4][5][6][7][8][9][10]. Two-level inverters are operated under very high switching frequency, resulting in high dv/dt of output voltage, increased heating up of the switches and higher electromagnetic interferences (EMI) [11][12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Transistor Clamped T-Type Multilevel H-Bridge Inverter With Inverted Double Reference Single Carrier PWM Technique for Renewable Energy Applications

et al. 2020

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The Multilevel inverters (MLIs) are a new breed of power electronics converters. They are primarily used for the conversion of dc power to ac power. The two-level inverters are conventionally used to obtain ac power, but it requires operating the switches under very high switching frequency. Besides, the two-level inverter necessitates the use of LC filters with the switches operating under high dv/dt stress. The MLIs offer the advantage of utilizing several dc voltage sources to generate a stepped ac waveform with the proper arrangement of switches. Investigation of a Transistor Clamped T Type H-Bridge Multilevel Inverter (TC-TT-HB-MLI) with Inverted Double Reference Single Carrier PWM Technique (IDRSCPWM) for Renewable Energy Applications are discussed in this paper. A PV source is taken as an input to the TC-TT-HB-MLI. For different modulation indices like 0.85, 1 and 1.25, the FFT analysis is performed and presented, which corresponds to the variations in the irradiations from solar energy. A single unit of the TC-TT-HB-MLI is extended to a generalized MLI structure named Generalized Transistor Clamped T-Type H-Bridge Multilevel Inverter (GTC-TT-HB-MLI). The significant benefits of GTC-TT-HB-MLI are the multiple numbers of reductions in the switch count, and driver circuit counts for a higher number of MLI levels. Fast Fourier Transform (FFT) analysis is carried out on the MLI output to calculate the total harmonics distortion (THD). The experimental verification is performed using SPARTAN 3E-XCS250E; the gate signals are generated and provided to the switches.

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A new hybrid flying capacitor–based single‐phase nine‐level inverter

Cited by 26 publications

References 30 publications

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

A new quasi‐resonant switched capacitor multilevel inverter with the self‐voltage balancing capability

A three‐phase inverter circuit using half‐bridge cells and T‐NPC for medium‐voltage applications

Investigation of a Transistor Clamped T-Type Multilevel H-Bridge Inverter With Inverted Double Reference Single Carrier PWM Technique for Renewable Energy Applications

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