Input-Series-Output-Parallel Phase-Shift Full-Bridge Derived DC–DC Converters With Auxiliary LC Networks to Achieve Wide Zero-Voltage Switching Range

Guo, Zhiqiang; Sha, Deshang; Liao, Xiaozhong; Luo, Jiankun

doi:10.1109/tpel.2014.2309342

Cited by 66 publications

(21 citation statements)

References 14 publications

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“…Among these PCSs, DC-AC inverters which are directly connected to the plasma chamber mainly affect the performance Several control methods have been proposed for the two-stage AC-AC converters in Figure 1. The first method employs an AC-DC converter that controls the DC-link voltage (V DC ) at a constant value, and all of the connected inverters control the output power of the PCS, simultaneously [16,17]. When applying this control method, unnecessary power losses in the light and intermediate load region occur, because all of the connected inverters are used in the operation, even if one or two inverters are capable of controlling the output power.…”

Section: Conventional Control Algorithm Of Dc-ac Inverters For Plasmamentioning

confidence: 99%

“…As several inverters were connected, a flexible design was possible, according to the rated power. In addition, the input voltage of a filter network (v TR.S ) was the sum of the secondary side voltages of the transformers, so a high output voltage could be generated, which was supplied to the chamber [16][17][18][19]. Another advantage was that, this configuration was not significantly affected by the unbalance between DC-AC inverters.…”

Section: Introductionmentioning

confidence: 99%

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Control Strategy for Power Conversion Systems in Plasma Generators with High Power Quality and Efficiency Considering Entire Load Conditions

et al. 2019

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In this paper, a control method for the power conversion system (PCS) of plasma generators connected with a plasma chamber has been presented. The PCS generates the plasma by applying a high magnitude and high frequency voltage to the injected gasses, in the chamber. With regards to the PCS, the injected gases in the chamber could be equivalent to the resistive impedance, and the equivalent impedance had a wide variable range, according to the gas pressure, amount of injected gases and the ignition state of gases in the chamber. In other words, the PCS for plasma generators should operate over a wide load range. Therefore, a control method of the PCS for plasma generators, has been proposed, to ensure stable and efficient operation in a wide load range. In addition, the validity of the proposed control method was verified by simulation and experimental results, based on an actual plasma chamber.

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Section: Conventional Control Algorithm Of Dc-ac Inverters For Plasmamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control Strategy for Power Conversion Systems in Plasma Generators with High Power Quality and Efficiency Considering Entire Load Conditions

et al. 2019

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“…However, the voltage stress of the primary switches is high and thus low-voltage MOSFETs with low on-state resistances cannot be used [22], [23]. In the phaseshift full-bridge dc-dc converter, the primary switches can achieve zero-voltage-switching (ZVS); however, it is challenged when operating in a wide voltage gain range, e.g., the narrow ZVS range for the lagging leg switches, duty cycle loss, large circulating current, and voltage spikes across the output diodes [24].…”

Section: Introductionmentioning

confidence: 99%

“…The LLC resonant converter is a promising topology in terms of high efficiency and high power density [24]- [27]. However, the primary concern for this topology is that the voltage gain range is not wide and thus hybrid control schemes [28]- [30] have to be applied, which increases the realization complexity of the MPPT.…”

Section: Introductionmentioning

confidence: 99%

A 1-MHz Series Resonant DC–DC Converter With a Dual-Mode Rectifier for PV Microinverters

Shen

Wang

Shen

et al. 2019

IEEE Trans. Power Electron.

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The photovoltaic (PV) output voltage varies over a wide range depending on operating conditions. Thus, the PVconnected converters should be capable of handling a wide input voltage range while maintaining high efficiencies. This paper proposes a new series resonant dc-dc converter for PV microinverter applications. Compared with the conventional series resonant converter (SRC), a dual-mode rectifier (DMR) is configured on the secondary side, which enables a twofold voltage gain range for the proposed converter with a fixed-frequency phase-shift modulation scheme. The zero-voltage switching (ZVS) turn-on and zero-current switching (ZCS) turn-off can be achieved for active switches and diodes, thereby minimizing the switching losses. Moreover, a variable dc-link voltage control scheme is introduced to the proposed converter, leading to a further efficiency improvement and input-voltage-range extension. The operation principle and essential characteristics (e.g., voltage gain, soft-switching, and root-mean-square current) of the proposed converter are detailed in this paper, and the power loss modeling and design optimization of components are also presented. A 1-MHz 250-W converter prototype with an input voltage range of 17 V-43 V is built and tested to verify the feasibility of the proposed converter. Index terms-PV microinverter, dc-dc converter, series resonant converter, wide input voltage range, 1-MHz frequency.

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“…With common duty ratio control [1] [2], IVS or OCS controller is not needed. However, excellent power sharing can only be achieved for modules with identical parameters.…”

Section: Introductionmentioning

confidence: 99%

Decentralized Inverse-Droop Control for Input-Series–Output-Parallel DC–DC Converters

Sha

Liao

2015

IEEE Trans. Power Electron.

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113

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Input-series-output-parallel (ISOP) DC-DC converters are suited for high input-voltage and low output-voltage applications. This letter presents a decentralized inverse-droop control for this configuration. Each module is self-contained and no central controller is needed, thus improving the system modularity, reliability and flexibility. With the proposed inverse-droop control, the output voltage reference rises as the load becomes heavy. Even though the input voltages is not used in the inverse-droop loop, the power sharing including input voltage sharing (IVS) and output current sharing (OCS) can still be well achieved. Besides, the output voltage regulation characteristic is not affected by the variation of input voltage. The operation principle is introduced, and stability of the strategy is also revealed based on small signal modeling. Finally, the experiment is conducted to verify the effectiveness of the control strategy. Index Terms--input-series and output-parallel, input voltage sharing, output current sharing, inverse-droop.

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Input-Series-Output-Parallel Phase-Shift Full-Bridge Derived DC–DC Converters With Auxiliary LC Networks to Achieve Wide Zero-Voltage Switching Range

Cited by 66 publications

References 14 publications

Control Strategy for Power Conversion Systems in Plasma Generators with High Power Quality and Efficiency Considering Entire Load Conditions

Control Strategy for Power Conversion Systems in Plasma Generators with High Power Quality and Efficiency Considering Entire Load Conditions

A 1-MHz Series Resonant DC–DC Converter With a Dual-Mode Rectifier for PV Microinverters

Decentralized Inverse-Droop Control for Input-Series–Output-Parallel DC–DC Converters

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