A Novel Hybrid PFM/IAPWM Control Strategy and Optimal Design for Single-Stage Interleaved Boost-LLC AC–DC Converter With Quasi-Constant Bus Voltage

Yi, Junhong; Ma, Hongbo; Li, Xiaobin; Lu, Song; Xu, Jianping

doi:10.1109/tie.2020.3016260

Cited by 28 publications

(14 citation statements)

References 29 publications

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“…v bus V bus.avg (38) Figure 6 shows the schematic diagram of the proposed control strategy, which can be realized by DSP F28335 controller integrated with AD modules and PWM generation modules. v bus.meas , v s.meas , and V o.meas are defined as measured values of v bus , v s , and V o .…”

Section: Control Strategy Of the Single-stage Topologymentioning

confidence: 99%

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Liu

Loo

Wang

et al. 2023

IET Power Electronics

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Singe‐phase single‐stage AC–DC converters exhibit the advantages of lower cost, higher efficiency, and lower power semiconductor device count compared with traditional two‐stage topologies. However, most existing single‐stage AC–DC topologies encounter some or all the following drawbacks: hard‐switching operation, bulky bus or output capacitor, uncontrolled bus voltage, not actively shaped input current, a large amount of power semiconductor devices, etc. The bridgeless single‐stage full‐bridge AC–DC converter can be considered a promising solution for high power capacity and efficiency. However, this topology still suffers from most of the drawbacks. In this paper, a new asymmetric modulation method of bridgeless single‐stage full‐bridge AC–DC converter is proposed to achieve active power factor (PF) correction and zero‐voltage switching. Topology description, the proposed modulation and control methods, theoretical analysis progress, and reference design procedure are presented in detail. Finally, a 2‐kW laboratory prototype is implemented with experimental results presented to validate the principle and design.

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Section: Control Strategy Of the Single-stage Topologymentioning

confidence: 99%

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Liu

Loo

Wang

et al. 2023

IET Power Electronics

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“…According to Eqs. ( 4), ( 8), (12), and ( 16), the maximum magnetizing inductance for each mode is calculated as follows…”

Section: Design Guidelines Of the Resonance Tank Parametersmentioning

confidence: 99%

“…The first method is to suppress the fluctuation range of carrier frequency. The AC/DC converter combined an interleaved totem-pole rectifier and an LLC type DC/DC converter are proposed (12) (13) . However, these systems have issues such as the increase in DC-link voltage.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Wide Range AC/DC Converter using Mode Transition of Six-Arm LLC

Sekine

Haga

Orii³

2022

IEEJ Journal IA

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This paper proposes an LLC type AC/DC converter to achieve high efficiency for wide input voltage range. The proposed converter has four operating modes with different voltage gain characteristics depending on the ON/OFF state of the six switches. The proposed system achieves a wide range of voltage gain by switching between different operating modes. Consequently, the proposed system reduces the magnetizing current by designing a narrow voltage gain in each operating mode. Moreover, the proposed control method achieves power factor correction control of the input current and smooth transition between different operating modes. This paper analyzes the operation and voltage gain characteristics of the proposed converter. A design method to reduce the magnetizing current and the mode transition method is also explained. Based on the experimental results on a 200 W prototype, the basic operation of the proposed system is confirmed in the input voltage range of 100 V to 240 V. Furthermore, the total harmonic distortion (THD) of the input current up to the 40th order of the fundamental frequency is less than 5% across the entire input voltage range. The efficiency of the proposed system is more than 92.5% across the entire input voltage range.

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“…However, topologies like [22], [23], [49] are only suitable for low voltage applications. Also, the achievable output voltages by [5], [11], [14]- [17], [24], [50]- [52], which are roughly twice the abovementioned LLC based resonant converters due to their half or full bridge output rectifiers, are still low for lots of applications.…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

et al. 2022

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A current-fed LLC resonant converter is proposed for high-voltage and high-power applications. Here, a two-phase interleaved structure is used in the input stage under the continuous conduction mode (CCM) to effectively reduce the input current and output voltage ripple values and the input filter and the output capacitors volumes. Due to the expandable structure and high voltage gain, the proposed configuration is suitable for high voltage applications since low voltage stresses are applied across its components. In fact, voltage stresses across the power semiconductors, i.e., MOSFETs and output diodes, along with the output capacitors, are almost one-third of the output voltage in the implemented three-stage configuration of the proposed converter. Here, the switching frequency is chosen close to, but less than, the converter series resonant frequency to reduce its different components' current stresses and perform softswitching operation for all power devices under wide input voltage and output power variations. Therefore, conduction and switching losses, and EMI noises are effectively reduced. Consequently, efficiency is improved and high-frequency operation is possible, which reduces the volume of passive components to achieve high-power density. The given topology is thoroughly analyzed mathematically. Also, a 1 kW prototype converter has been implemented to validate the given simulations and analyses. Here, wide input voltage (100 V-200 V) and output power (100 W-1000 W) variations are applied, and an asymmetric pulse width modulation (APWM) technique is used at 143 kHz switching frequency to regulate the output voltage at 1 kV. The obtained maximum efficiency value is 95.3%.INDEX TERMS Asymmetric pulse width modulation (APWM), current-fed converter, interleaved technique, LLC resonant converter, multi-winding transformer.

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A Novel Hybrid PFM/IAPWM Control Strategy and Optimal Design for Single-Stage Interleaved Boost-LLC AC–DC Converter With Quasi-Constant Bus Voltage

Cited by 28 publications

References 29 publications

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

Asymmetric modulation of bridgeless single‐stage full‐bridge AC–DC converter for active power factor correction and zero voltage switching

High-Efficiency Wide Range AC/DC Converter using Mode Transition of Six-Arm LLC

A High Step-Up Interleaved Current-Fed Resonant Converter for High-Voltage Applications

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