A Unified Differential Mode Noise Estimation Method and Filter Size Comparison in Single-Phase Multileg and Multilevel Totem-Pole PFC Converters

Tausif, Ali; Dusmez, Serkan

doi:10.1109/tpel.2023.3255543

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…To achieve high efficiency and high power density, the proposed converter has been optimized according to the framework presented in [24], which has suggested adopting a f sw of 200 kHz together with input inductances L 1 and L 2 of 80 µH. This makes the input current ripple frequency 400 kHz that reduces the size of the DM filter [25]. According to the results, the optimum starting current level of soft-switching is found as 4 A, while i Lr,pk = 2 • i L,pk (t min ) is selected.…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen from ( 24) that 2 nd term of the equation is scaled down by a factor K, where, 0<K ≤1 and it takes on the values based on the condition of t ON,aux as provided in (25). These two equations also state that partial soft-switching or valley switching becomes inevitable once t ON,aux is less than one quarter of the resonance period T r , which happens only near zero-crossings of line voltage where the duty cycle of the main FET reaches to maximum, while that of synchronous switch becomes too low.…”

Section: A Simulation Resultsmentioning

confidence: 99%

“…It is important to note, however, that in theory, this ZVS range remains independent of the load conditions. The parameters to determine the range of ZVS can be determined using ( 24) and (25). In this analysis, i L,pk is assumed to be zero as the ZVS is independent of load.…”

Section: A Simulation Resultsmentioning

confidence: 99%

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A High Power Density Zero-Voltage-Switching Totem-Pole Power Factor Correction Converter

Tausif,

Bakan,

Dusmez

2024

IEEE Trans. Power Electron.

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The power factor correction (PFC) circuit is an essential component in high-power supplies with non-linear loads, occupying nearly half the size of a typical power supply. To minimize the size of passive components in PFC converters, the switching frequency must be increased to several hundred kHz, a challenge even when employing Gallium Nitride (GaN) devices under hard-switching conditions. This paper proposes a new GaN based Totem-pole (TP) PFC converter integrated with a bidirectional soft switching cell. Unlike critical-conduction-mode TP PFC circuit, the proposed converter operates in continuousconduction-mode with simple control. Design considerations and optimization of soft-switching cell are discussed and verified with simulations. As a proof of concept, a two-phase interleaved version of the proposed converter rated at 3700 W has been designed. The designed prototype achieves a peak efficiency of 99.14% and surpasses the hard-switched GaN based TP PFC converters in both power density and cost.

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Section: Resultsmentioning

confidence: 99%

Section: A Simulation Resultsmentioning

confidence: 99%

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A High Power Density Zero-Voltage-Switching Totem-Pole Power Factor Correction Converter

Tausif,

Bakan,

Dusmez

2024

IEEE Trans. Power Electron.

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“…3. Firstly, the algorithm calculates both the input current ripple envelope and the resulting DM noise at the multiples of the effective current ripple frequency using the Fourier coefficient expansion method as proposed in [27]. Then, the required filter attenuation is calculated for the first DM harmonic in the EMI spectrum.…”

Section: A Differential Mode Filtermentioning

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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“…Among the various bridgeless boost converters, it has high efficiency and low common-mode (CM) noise compared [12][13][14][15][16][17]. But, due to the totempole structure of QB1 and QB2, a reverse recovery current of QB1 flows to QB2 when QB1 is turned on in the positive cycle, which causes large switching loss at QB2 [18][19][20]. The reverse recovery current of QB2 also flows to QB1 when QB2 is turned on in the negative cycle of the input voltage.…”

Section: Introductionmentioning

confidence: 99%

Efficiency and PF Improving Techniques with a Digital Control for Totem-Pole Bridgeless CRM Boost PFC Converters

Han

2024

Energies

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A totem-pole bridgeless boost converter is one of the most promising topologies for the power factor correction (PFC) stage in high-power applications due to its high efficiency and small number of components. However, due to the totem-pole structure of the field-effect transistor (FET), very high switching loss occurs via the reverse recovery current of the body diode. To solve these problems, critical mode (CRM) control is a good solution to achieve the valley switching technique. With valley switching of CRM control, the switching loss decreases drastically with decreasing turn-on voltage. But, although the CRM control enables valley switching, it is hard to make an exact valley switching control with general zero-voltage detection circuits. In addition, when a frequency limitation scheme is applied to prevent a very high frequency, the switch can operate with hard switching at the boundary of the frequency limitation. Furthermore, the CRM boost PFC has a low PF and high total harmonic distortion (THD) under light-load conditions due to the large negative current resulting from resonance between the inductor and parasitic capacitance. It becomes worse at near-zero input voltage since the resonance current becomes larger near zero-input voltage. Therefore, in this paper, a totem-pole bridgeless boost PFC converter with high efficiency, high PF, and low THD is developed using TMS320F28377 by Texas Instruments. Based on the basic digital structure of the totem-pole bridgeless converter, the proposed controls help with exact valley switching, PF and THD improvement, and frequency limitation. The prototype converter is verified using 90–264 VAC input voltages and 450 V/3.3 kW output specifications.

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A Unified Differential Mode Noise Estimation Method and Filter Size Comparison in Single-Phase Multileg and Multilevel Totem-Pole PFC Converters

Cited by 8 publications

References 21 publications

A High Power Density Zero-Voltage-Switching Totem-Pole Power Factor Correction Converter

A High Power Density Zero-Voltage-Switching Totem-Pole Power Factor Correction Converter

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

Efficiency and PF Improving Techniques with a Digital Control for Totem-Pole Bridgeless CRM Boost PFC Converters

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