Instantaneous Power Consuming Level Shifter for Improving Power Conversion Efficiency of Buck Converter

Ma, Hyunggun; Namgoong, Gyeongho; Choi, Eun-Ho; Bien, Franklin

doi:10.1109/tcsii.2018.2878042

Cited by 11 publications

(7 citation statements)

References 9 publications

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“…The DC-Link capacitor eliminates the ripple-voltage from RSC and regulates a constant VIN to three-phase VSI. It provides a smooth DC-input to the VSI connected to the grid [33]. The inverted AC output-voltage was unified with the grid through a RLC filter as the phase-voltages across VSI was quasi-square wave.…”

Section: Fig13 Voltage Across Rectifier (Vr)mentioning

confidence: 99%

An Unification of Type-3 Grid Connected Wecs in Open Modules Encapsulated by Boost Converter

MaryAntony,

Karthikeyan,

Tran

2024

Preprint

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In past three decades, consumption of energy requirements had escalated desperately. Sources were required to meet the power needs as fossil fuels were not able to balance the energy demands. The RES enacts the power needs as it was inexhaustible in nature. Henceforth, the growth rate of Renewable-Energy had been increased intensively to meet the electrical energy demand. RES were expedient and extensively available in nature. An overview of grid-connected WECS manifests type-3 variable speed WT with DFIG was expedient. The accomplishment of DC-DC converter on DFIG based grid connected system epitomize Re-Boost converter (RBC) to be superior in its performance. The Re-boost converter had effectuated in open-loop and closed-loop operation for unification of DFIG based grid connected systems. The DC link voltage of grid connected Inverter had been stabilized by shunting DC-Link Capacitors. The DC-link capacitor had been embraced between the GCS and RSC. It was shunted primarily to provide smooth input to the inverter connected to the grid. AC–DC Converters have diminished conduction & switching losses but empathizes low PF and HD to be more. DC–AC Converters have less switching-stress and harmonics but embraces higher conversion loss. AC–AC Converter achieves higher efficiency but have prevailed the drawbacks due to large size and high harmonics. DC-DC converters embraces the power boosting stage. A Boost Converter (BC) was best suited and reliable due to its better performance and lower power losses. This converter encompasses a topology with continuous input-current which invokes reduced voltage stress. The PI-Controller provides zero control error and it was insensitive to interference of the measurement control. The FOPID-Controller exhibits more adjustable time and frequency responses.

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Section: Fig13 Voltage Across Rectifier (Vr)mentioning

confidence: 99%

An Unification of Type-3 Grid Connected Wecs in Open Modules Encapsulated by Boost Converter

MaryAntony,

Karthikeyan,

Tran

2024

Preprint

View full text Add to dashboard Cite

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“…Many FHV-LSs have been proposed in the literature [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] to reduce the propagation delay. According to the structures, three topologies (Topology-I, Topology-II, and Topology-III) are summarized in Figure 1.…”

Section: Review Of Conventional Fhv-lssmentioning

confidence: 99%

“…With signal conversion, the state of the latch unit is changed by the short pulse current. To reduce power consumption, an instantaneous-power-consuming level shifter is proposed to increase the efficiency [22] since the output detector is used to turn the level shifter off before the delay time. The CM-LSs proposed in [23][24][25] alter the state of RS-trigger by the voltage cross a resistor.…”

Section: Review Of Conventional Fhv-lssmentioning

confidence: 99%

A Novel Floating High-Voltage Level Shifter with Pre-Storage Technique

Yang

et al. 2022

Sensors

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This paper proposes a novel floating high-voltage level shifter (FHV-LS) with the pre-storage technique for high speed and low deviation in propagation delay. With this technology, the transmission paths from input to output are optimized, and thus the propagation delay of the proposed FHV-LS is reduced to as low as the sub-nanosecond scale. To further reduce the propagation delay, a pull-up network with regulated strength is introduced to reduce the fall time, which is a crucial part of the propagation delay. In addition, a pseudosymmetrical input pair is used to improve the symmetry of FHV-LS structurally to balance between the rising and falling propagation delays. Moreover, a start-up circuit is developed to initialize the output state of FHV-LS during the VDDH power up. The proposed FHV-LS is implemented using 0.3-µm HVCMOS technology. Post-layout simulation shows that the propagation delays and energy per transition of the proposed FHV-LS are 384 ps and 77.7 pJ @VH = 5 V, respectively. Finally, the 500-points Monte Carlo are performed to verify the performance and the stability.

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“…The previously reported and proposed level shifters using an MPC technique are shown in Fig. 4 [23, 24]. The MPC level shifter is divided into two parts: the current sinking and current sourcing parts.…”

Section: Circuit Implementation Of the Proposed Dcm Buck Convertermentioning

confidence: 99%

“…As a result, the large static current is eliminated, and only a dynamic current is dissipated during the transition. The level shifter in [23], which is shown in Fig. 4 a uses diode‐connected M P4 to regulate the maximum voltage drop of the output, V OUTH .…”

Section: Circuit Implementation Of the Proposed Dcm Buck Convertermentioning

confidence: 99%

Bootstrap capacitorless DCM VOT buck converter with dead‐time‐based off‐time calibration for magnetic resonance wireless power transfer

Namgoong

Choi

et al. 2020

IET Power Electronics

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This study reports a miniaturised discontinuous conduction mode (DCM) variable on-time (VOT) buck converter providing an output of 1.8 V in the input range of 3-12 V to support applications with large wireless coupling. Conventionally, an additional large capacitor has been used as a bootstrap capacitor to drive the high-side switch of buck converters, which prevents minimisation. In this study, a standalone momentary power consumption level shifter is proposed to remove the additional bootstrap capacitor and increase the power conversion efficiency (PCE) in the buck converter. A Zener diode is utilised to reduce the power consumption of the level shifter. In addition, a dead-time-based off-time calibration circuit is proposed to further increase the PCE by reducing the low-side conduction loss. The proposed circuit is fabricated with a TSMC 0.18-µm BCD process, and the core circuit occupies an active area of 0.68 mm 2 with two external components. It provides output currents in the range of 20 µA to 3 mA with a maximum switching frequency of 750 kHz. The maximum efficiency of the converter below 5 mW is 80.2%.

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Instantaneous Power Consuming Level Shifter for Improving Power Conversion Efficiency of Buck Converter

Cited by 11 publications

References 9 publications

An Unification of Type-3 Grid Connected Wecs in Open Modules Encapsulated by Boost Converter

An Unification of Type-3 Grid Connected Wecs in Open Modules Encapsulated by Boost Converter

A Novel Floating High-Voltage Level Shifter with Pre-Storage Technique

Bootstrap capacitorless DCM VOT buck converter with dead‐time‐based off‐time calibration for magnetic resonance wireless power transfer

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