Coupled-Inductor Buck–Boost Inverter With Reduced Current Ripple

Khan, Ashraf Ali; Eberle, Wilson; Wang, Liwei; Akbar, Fazal; Khan, Usman Ali; Lu, Yun; Agamy, Mohammad

doi:10.1109/tpel.2019.2962668

Cited by 16 publications

(11 citation statements)

References 26 publications

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“…The main reasons are as follows. The switching frequency of S 1 and S 2 increases with U in from (15), so switching loss of semiconductors in buck mode is larger than that at in hybrid mode. However, currents i L1 and i L2 in buck mode are smaller than those in hybrid mode from Figures 10D and 11D, so conduction loss of semiconductors and loss of inductors in buck mode are smaller than those in hybrid mode.…”

Section: Resultsmentioning

confidence: 97%

“…Therefore, the maximum switching frequency of S 1 (f S1max ) can be deduced from (14). From (15), when U in and f S1max are fixed on, h cannot be too small, or else L 1 will be large. It cannot also be too large, or else the ripple current of L 1 (Δi L1 ) will be large, and thus, waveform quality of i g will be reduced.…”

Section: Specificationsmentioning

confidence: 99%

“…However, the circulating current exists in this inverter. Thus, a coupled‐inductor buck–boost inverter adding two clamping metal–oxide–semiconductor field‐effect transistors (MOSFETs) was proposed to decrease the circulating current 15 . However, voltage stress of MOSFETs and diodes in the abovementioned inverters is high, which is equal to sum of the input and grid voltages.…”

Section: Introductionmentioning

confidence: 99%

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Grid‐connected buck–boost inverter without shoot‐through issue and with reduced voltage stress

Yao

2021

Circuit Theory & Apps

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Grid-connected buck-boost inverters are used in wide input-voltage range application. However, there is a shoot-through problem in traditional gridconnected inverters. Moreover, voltage stress of semiconductors is high in conventional buck-boost inverters. Therefore, a grid-connected buck-boost inverter without shoot-through issue and with reduced voltage stress is presented. The proposed inverter is a single-stage system. When input voltage is higher than the grid voltage, the proposed inverter works in buck mode; when input voltage is lower than the grid voltage, it operates in boost mode. Thus, voltage stress of semiconductors is reduced. Only one switch is operated in high frequency in each period, so efficiency of the inverter can be improved.Operating principle of the proposed inverter is illustrated. Voltage stress analysis, loss calculation, and filter design guidelines and example are given.Finally, simulation and experimental results of a 300-W proposed inverter confirm the theoretical analysis.

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Section: Resultsmentioning

confidence: 97%

Section: Specificationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Grid‐connected buck–boost inverter without shoot‐through issue and with reduced voltage stress

Yao

2021

Circuit Theory & Apps

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“…In addition to these advantages, this structure has drawbacks, such as many inductors and complex inductor current control on each side of the converter. In reference [13], the same author suggests the use of coupled inductors for the same structure in Figure 1b, in order to reduce the size of inductors. It should also be noted that differential-mode inverters suffer from current circulating problems and usually require large output capacitors.…”

Section: Differential Connectionmentioning

confidence: 99%

Single-Stage Buck–Boost Inverters: A State-of-the-Art Survey

2022

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Single-stage buck–boost inverters have attracted the attention of many researchers, due to their ability to increase/decrease the output voltage in one power conversion stage. One of the most important uses of these inverters is in photovoltaic applications, where the voltage of the solar panels varies in a wide range. In recent years, many new inverters have been proposed to improve the performance of existing structures. In this paper, the state of the art of these single-stage buck–boost inverters is discussed. The advantages and disadvantages of each structure are examined from different perspectives, such as the number of components, losses, and performance. Finally, in a general comparison, the properties of all structures are discussed and summarized in a table.

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“…The DBIs also have been studied to work under non-unity power factor (PF) conditions. There are various dual-buck structures [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. A half-bridge DBI (HBDBI) for energy storage system (ESS) with a capability of bidirectional power flow was proposed in [19].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Dual-Buck Inverter With Mitigating Reverse Recovery Characteristics and Supporting Reactive Power

Han

Cho

2022

IEEE Access

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This paper proposes a three-level dual-buck inverter (DBI) that reduces reverse recovery current and compensates reactive power. To reduce the reverse recovery problem of main switching diodes in the DBI, the auxiliary circuit consisting of diodes and coupled inductors is adapted. The auxiliary circuit enables zero-current turn-off of the diodes. The coupled inductor design is also conducted considering not only for unity power factor (PF) but also non-unity PF operations. By utilizing the auxiliary circuit, the reverse recovery and the shoot-through problems in silicon devices can be significantly mitigated so that the efficiency and the reliability of the DBI are much improved. Meanwhile, the pulse-width modulation scheme is also proposed to supply reactive power with the DBI which is a unidirectional inverter. In the proposed modulation method, the duty offset is simply added according to the required PF and the operating region of the DBI. By doing so, traditional current control concepts for bidirectional inverters can be directly applied to the DBI without any modification. By utilizing the proposed techniques, the reliability, efficiency, and utilization of the DBI can be significantly improved. The experimental results with a 3 kVA DBI prototype demonstrate the effectiveness of the proposed DBI.

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Coupled-Inductor Buck–Boost Inverter With Reduced Current Ripple

Cited by 16 publications

References 26 publications

Grid‐connected buck–boost inverter without shoot‐through issue and with reduced voltage stress

Grid‐connected buck–boost inverter without shoot‐through issue and with reduced voltage stress

Single-Stage Buck–Boost Inverters: A State-of-the-Art Survey

Performance Improvement of Dual-Buck Inverter With Mitigating Reverse Recovery Characteristics and Supporting Reactive Power

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