Feasibility Study of Compact High-efficiency Bidirectional 3-Level Bridgeless Totem-pole PFC/Inverter at Low Cost

Vu, Trong Tue; Beinarys, Rytis

doi:10.1109/apec39645.2020.9124152

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…The control of the Bridgeless Totem-Pole PFC topology can be achieved through multiple techniques, such as analog control, digital control, and mixedsignal control. The control circuit dynamically adjusts the duty cycle of the power switches to maintain a consistent output voltage and improve the power factor [78,79]. This topology finds applications in diverse fields, including electric vehicle onboard chargers, energy storage systems, and server power supplies, showcasing its versatility and utility.…”

Section: Bridgeless Totem-pole Pfcmentioning

confidence: 99%

Overview on Battery Charging Systems for Electric Vehicles

Dini,

Saponara,

Colicelli

2023

Electronics

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Catalyzed by the increasing interest in bi-directional electric vehicles, this paper delves into their significance and the challenges they encounter. Bi-directional electric vehicles not only serve as transportation but also function as essential electricity resources. Central to this energy revolution are On-Board Chargers (OBCs), which are pivotal in converting alternating (AC) energy into direct (DC) energy and vice versa. In this context, we explore the various circuit architectures of OBCs employed in bi-directional electric vehicles. We delve into the intricacies of rectifiers, switching converters, and the application of advanced control and filtering technologies. Our analysis extends to the implications of these circuit architectures on aspects such as voltage regulation capability, energy efficiency, and thermal management. Furthermore, we address the broader significance of these developments in the integration of bidirectional systems, which are driving advances in circuit architectures to better harness the energy flexibility of electric vehicles. We emphasize the critical role of bi-directional electric vehicles in the transition toward a smart and sustainable energy grid. To enhance accessibility for a diverse readership, we will provide concise definitions or explanations for technical terms used throughout the paper, ensuring that our work is approachable even for those who may not be experts in the field.

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Section: Bridgeless Totem-pole Pfcmentioning

confidence: 99%

Overview on Battery Charging Systems for Electric Vehicles

Dini,

Saponara,

Colicelli

2023

Electronics

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“…Study [ 18 ] discusses how to reduce the number of components to minimize the total harmonic distortion (THD) by constructing the multilevel inverter asymmetrically. Study [ 19 ] presents a classic totem pole structure with power factor correction (PFC), where a power switch is used instead of a diode to realize the bidirectional operation of the converter. In particular, the control strategy of the circuit adopts a mix of high and low speeds to drive two switching circuits: one is a low-speed arm half-bridge, which uses power switches with low on-resistance to switch between positive and negative half-cycles of the sinusoidal waveform, and the other is a high-speed arm, which uses a multilevel inverter circuit equipped with a low-voltage stress feature to switch between high-frequency switches, so as to reduce the THD.…”

Section: Introductionmentioning

confidence: 99%

“…Flying capacitor circuits require additional pre-charging or auxiliary circuits to ensure that the voltages across the power switches can be reduced in advance before the circuit operates. The circuit structures shown in [ 19 , 20 , 21 , 22 , 23 , 24 ] are based on the difference in the characteristics of circuits A and B to create an additional voltage hierarchy. However, the different characteristics of circuits A and B increase the complexity of the control strategy, and the voltage gains of circuits A and B need to be considered to match each other.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Multi-Level Inverter with Symmetry and Simplification

Shieh,

Hwu,

Chen

2024

Micromachines

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This paper presents a high-performance, multilevel inverter with symmetry and simplification. This inverter is a single-phase, seven-level symmetric switched-capacitor inverter based on the concept of the double voltage clamping circuit connected to the half-bridge circuit. Above all, only a single DC power supply is used to achieve a single-phase inverter with seven levels and a voltage gain of three. In addition to analyzing the operating principle of the proposed switched-capacitor multilevel inverter in detail, the stability analysis and controller design are carried out by the state-space averaging method. The feasibility and effectiveness of the proposed structure are validated by some simulated results based on the PSIM simulation tool and by some experiments using FPGA as a control kernel, respectively. However, in this study, the switches were implemented by MOSFETs to meet a high switching frequency. These MOSFETs can be replaced by IGBTs in the motor drive applications so that the used switching frequency can be reduced.

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“…Multi-level (ML) converters have been initially introduced for high voltage applications such as solid-state-transformers, high voltage inverters, etc [1], [2], [3], [4], [5]. With the recent advances in Gallium Nitride (GaN) power devices, some studies have proposed designs with ML configurations to achieve high power density single-phase totem pole (TP) power factor correction (PFC) converters using low voltage GaN FETs with better figure-of-merit [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19]. For a singlephase N-level TP PFC, there are N-1 half-bridge circuits and N-2 flying capacitor stacks in parallel with them as…”

Section: Introductionmentioning

confidence: 99%

“…FETs connected in complementary pairs are driven with a phase shift of 360/(N-1) with respect to other half-bridges. Phase-shifted PWM control method shifts the input current ripple frequency to N-1 times the switching frequency (f sw ) [7]. Thanks to the increased input current ripple frequency and decreased switching voltage levels, the total volume of both electromagnetic interference (EMI) filter and PFC inductor is significantly reduced [8].…”

Section: Introductionmentioning

confidence: 99%

Optimization and Design Considerations of GaN-Based Multi-Level TP PFC Converters

Bulut

Kocabaş

Dusmez³

2023

IEEE Access

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Latest developments in low voltage wide-bandgap semiconductor technology have increased the popularity of single-phase multi-level (ML) totem pole (TP) power-factor correction (PFC) converters. Phase shifted flying capacitor based power stages offer several advantages, such as higher input current ripple frequency, smaller size inductor and differential mode (DM) filter, and usage of low voltage Gallium Nitride (GaN) devices with better figure-of-merit. Even though it has been proven that ML TP PFC converters have good power density and efficiency, the determination of optimal voltage levels and switching frequency requires a system-level optimization. This paper proposes an optimization framework for ML TP PFC converters, taking the power stage, thermal, DM filter, and magnetic designs, as well as practical design considerations, into account to determine the voltage-levels and switching frequency that minimize the power losses, cost and volume of the total system. To process output power of 3700W, the optimization tool suggests using a 4-Level GaN TP PFC topology switched at 45 kHz. The outcome of the tool has been compared with other fixed inductor current ripple designs, as well as optimized designs for 3-Level and 5-Level TP PFC converters in terms of cost, volume, and power losses. In accordance with the optimization results, a prototype of a 4L TP PFC rated at 3700 W is designed, which achieves a peak efficiency of 99.6% at 1 kW and >99.1% efficiency under the full power range.INDEX TERMS Ac/dc conversion, multi-level, optimization, power factor correction, totem-pole.

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Feasibility Study of Compact High-efficiency Bidirectional 3-Level Bridgeless Totem-pole PFC/Inverter at Low Cost

Cited by 8 publications

References 7 publications

Overview on Battery Charging Systems for Electric Vehicles

Overview on Battery Charging Systems for Electric Vehicles

High-Performance Multi-Level Inverter with Symmetry and Simplification

Optimization and Design Considerations of GaN-Based Multi-Level TP PFC Converters

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