Implementation of multi-level bridgeless PFC rectifiers for mid-power single phase applications

Vu, Trong Tue; Young, George

doi:10.1109/apec.2016.7468117

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…It addresses the above issues of the FCML boost bridgeless PFC. A 200 W four-level FCML totem-pole PFC rectifier with 200 V Si MOSFETs is reported in [12]. However, due to the high switching loss and reverse recovery loss of 200 V Si MOSFETs, the efficiency is only around 98% at 150 kHz switching frequency.…”

Section: Introductionmentioning

confidence: 99%

Design of a 2.5 kW Four-Level Interleaved Flying Capacitor Multilevel Totem-Pole PFC Converter With AC-Side Passive Volume Optimization

Ishraq,

Mallik

2024

IEEE Open J. Power Electron.

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In this paper, a high-efficiency and high-density 2.5 kW four-level interleaved flying capacitor multilevel (FCML) totempole bridgeless power-factor-correction (PFC) rectifier with 200 V GaN devices is analyzed, designed, and tested. This 2.5 kW four-level continuous conduction mode (CCM) GaN totem pole PFC operates with three times inductor current ripple frequency than that of the switching frequency which significantly reduces the size of the inductors while also supporting switching loss reduction. This article compares the loss of the two-level CCM GaN totem-pole PFC, four-level non-interleaved FCML PFC and interleaved four-level FCML PFC with the same ripple frequency (300 kHz) and shows that the interleaved four-level CCM GaN PFC has much less device loss. In addition, this article discusses the detailed EMI spectrum analysis and derivation of the mathematical model for determining the attenuation requirement of the four-level interleaved FCML PFC converter followed by volumetric co-optimization of AC-side passives i.e., the boost inductor and differential mode (DM) EMI filter. A 2.5 kW fourlevel interleaved FCML GaN totem-pole PFC prototype with an optimized 94 kHz switching frequency is developed and tested in this article. The converter exhibits a peak efficiency of 99.14% with system power density reaching 89.47 W/inch 3 .

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Section: Introductionmentioning

confidence: 99%

Design of a 2.5 kW Four-Level Interleaved Flying Capacitor Multilevel Totem-Pole PFC Converter With AC-Side Passive Volume Optimization

Ishraq,

Mallik

2024

IEEE Open J. Power Electron.

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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%

“…Many published studies on single-phase ML TP PFC converters have demonstrated high-power-density prototypes [11], [12], [13], [14], [15], [16], [17], [18], [19]. Nevertheless, these prototypes are not fully optimized.…”

Section: Introductionmentioning

confidence: 99%

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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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Design of a GaN Totem-Pole PFC Converter Using DC-Link Voltage Control Strategy for Data Center Applications

Lee

Chen

2022

IEEE Access

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Implementation of multi-level bridgeless PFC rectifiers for mid-power single phase applications

Cited by 12 publications

References 10 publications

Design of a 2.5 kW Four-Level Interleaved Flying Capacitor Multilevel Totem-Pole PFC Converter With AC-Side Passive Volume Optimization

Design of a 2.5 kW Four-Level Interleaved Flying Capacitor Multilevel Totem-Pole PFC Converter With AC-Side Passive Volume Optimization

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

Design of a GaN Totem-Pole PFC Converter Using DC-Link Voltage Control Strategy for Data Center Applications

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