A novel nine‐level boost inverter with a low component count for electric vehicle applications

Naik, Banavath Shiva; Suresh, Y.; Rao, Bhukya Nageswar

doi:10.1002/2050-7038.13172

Cited by 20 publications

(16 citation statements)

References 31 publications

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“…By replacing the power switch P 3 and the power diode D with normal power MOSFETs and using the FC cell of Fig. 42(a), another similar 9L hybrid SC-based inverter with ten power switches and bidirectional power capability has also been introduced in [156]. The same concept has also been developed in [152].…”

Section: E Hybrid Mlismentioning

confidence: 99%

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

101

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Multilevel inverters (MLIs) with switched-capacitor (SC) units have been a widely rehearsed research topic in power electronics since the last decade. Inductorless/transformerless operation with voltage-boosting feature and inherent capacitor self-voltage balancing performance with a reduced electromagnetic interference make the SC-MLI an attractive converter over the other available counterparts for various applications. There have been many developed SC-MLI structures recently put forward, where different basic switching techniques are used to generate multiple (discrete) output voltage levels. In general, the priority of the topological development is motivated by the number of output voltage levels, overall voltage gain, and full dc-link voltage utilization, while reducing the component counts and stress on devices for better efficiency and power density. To facilitate the direction of future research in SC-MLIs, this article presents a comprehensive review, critical analysis, and categorization of the existing topologies. Common fundamental units are generalized and summarized with their merits and demerits. Ultimately, major challenges and research directions are outlined leading to the future technology roadmap for more practical applications.

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Section: E Hybrid Mlismentioning

confidence: 99%

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Barzegarkhoo

Forouzesh

Lee

et al. 2022

IEEE Trans. Power Electron.

101

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show abstract

“…31 However, boosting capability is missing in this topology. Hybrid MLIs integrating SC-MLI is proposed in Liu et al 32 Another SC-MLI is proposed in Naik et al 33 having reduced count of devices with boosting capability. However, there is no symmetry in the discharging process of the capacitors to the load.…”

Section: Switched-capacitor (Sc) MLImentioning

confidence: 99%

“…The power losses caused due to voltage ripple during a state can be computed as follows: [44][45][46][47][48]…”

Section: Capacitor Losses (P Cap )mentioning

confidence: 99%

“…Step 6: Finally, the small-signal model for the proposed single-phase grid-connected inverter can be calculated according to Equations ( 30), ( 34), ( 35), ( 37), ( 39), ( 41), (44), and (45). The following is a differential equation based on state variables with disturbance:…”

Section: Small-signal Model Of Proposed Bmlimentioning

confidence: 99%

“…In SC multilevel inverter topology, voltage ripple of capacitor can be obtained as follows 44 :

△ V_{c} = \frac{1}{C} true \int_{t_{a}}^{t_{b}} i_{C 11,12}^{2} d t

where i C 11 , i C 12 is current through both capacitors, and( t b − t a ) is discharging time during the state being considered. The power losses caused due to voltage ripple during a state can be computed as follows: 44–48

P_{r i p p l e} = \frac{f_{o}}{2} false(C_{11} △ V_{C 11}^{2} + C_{12} △ V_{C 12}^{2} false) = \frac{50}{2} \times false(4700 \times 1 0^{- 6} \times 5^{2} + 4700 \times 1 0^{- 6} \times 5^{2} false) = 5.875 W

…”

Section: Calculation Of Power Lossesmentioning

confidence: 99%

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Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Debela

Singh

Sood

2022

Circuit Theory & Apps

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In this paper, a reduced‐component switched‐capacitor boost multilevel inverter (SC‐BMLI) topology is proposed for off‐grid and on‐grid applications. Recently, switched‐capacitor‐based multilevel inverter (MLI) topologies have been employed to avoid the need for multiple isolated direct current (DC) sources when compared with traditional cascaded MLIs. To generate a nine‐level stepped‐up voltage across the load, the SC‐BMLI needs only eight power switches and two capacitors. To get the appropriate nine‐level switching pattern, phase disposition pulse width modulation (PD‐PWM) has been used. An extended 13‐level boost multilevel inverter (BMLI) is also discussed in this paper. The proposed topology is connected to the grid to control the grid current using synchronous reference frame‐based proportional–integral controller. A small‐signal modeling and analysis has been discussed in detail for the phase‐locked‐loop (PLL). Moreover, to prove the superior performance of the SC‐BMLI, comparative analysis with an existing single DC source MLI has also been performed. The feasibility of the 9‐level and 13‐level proposed topologies, with and without the grid‐connection, is evaluated by Matlab/Simulink simulation and verified by an experimental study using the OPAL‐RT 4510 real‐time platform. Further, prototype model of nine‐level BMLI has been developed in the laboratory using DSpace 1103 controller and results are compared with simulation.

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A capacitor based single source MLI with natural balancing and less component for EV/HEV application

Suresh

Naik

Rao

et al. 2022

Circuit Theory & Apps

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Summary Due to their remarkable performance, capacitor‐based inverters have recently gained attention. Hence, a new capacitor‐based multilevel inverter is presented in this paper for electric and hybrid electric vehicle (EV and HEV) applications. EV systems are quite well for their use of two‐level inverters; however, the generated load voltage comprises substantial undesirable harmonic content. It is regarded as one of the most efficient methods since replacing a two‐level inverter with a multilevel inverter improves the power quality despite significantly reducing total harmonic distortion. Therefore, the recommended filter dimension will also be minimized. A flurry of reliability concerns has arisen due to the increased number of devices, circuit complexity, and stress on the circuit devices. A nine‐level voltage waveform is created with only ten IGBTs, a DC‐Source, and two capacitors. In the proposed nine‐level inverter, the capacitor voltage is balanced utilizing a simple control approach to regulate the flying capacitor (FC) voltages actively. Here described a simple logic gate‐based pulse‐width modulation technique that ensures capacitor power balancing. The proposed inverter operation and capability are validated by experimental results derived from a laboratory prototype. Finally, by contrasting the new and standard inverter topologies, the virtues of the suggested architecture by the number of devices and price of the equipment are highlighted, and it is a simpler structure that requires less space and footprint area.

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A novel nine‐level boost inverter with a low component count for electric vehicle applications

Cited by 20 publications

References 31 publications

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Switched-Capacitor Multilevel Inverters: A Comprehensive Review

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

A capacitor based single source MLI with natural balancing and less component for EV/HEV application

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