Hybrid Modulated DCDC Boost Converter for Wearable Devices

Li, Tong; Gan, Yebing

doi:10.3390/electronics11203418

Cited by 2 publications

(2 citation statements)

References 28 publications

(34 reference statements)

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“…Conventional GaN LED driving systems with constant current are broadly classified into two competitive architectures, namely the switched-mode power supply (SMPS) [5] and linear-mode driving [6]. Typical SMPS LED driving circuit topologies, such as buck [7], boost [8], and buck-boost [9], are characterized by high efficiency and low flicker with a bulky system and a comparatively higher cost. Linear LED driving circuit topologies primarily use linear constant-current regulators, avoiding complex structures, including voltage transformation, filtering, and voltage stabilization in SMPSs.…”

Section: Introductionmentioning

confidence: 99%

Novel Pulsating-DC High-Voltage Linear Driving Scheme for GaN LED General Lighting

Zhang

Wang

et al. 2023

Electronics

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This work investigates a novel pulsating DC high-voltage linear driving scheme for GaN-based Light-emitting diode (GaN LED) general lighting to save costs and alleviate flicker. The superiority and practicality of this scheme in three-phase AC power grids were demonstrated for the first time. Compared to applications for single-phase AC grids, linear driving of GaN LEDs for three-phase AC grids can provide superior performance for general lighting. The DC component of the three-phase AC rectified voltage reaches 90.7%, which effectively alleviates the flicker problem. In this paper, we balanced GaN LED power and driving efficiency by optimizing the GaN LED distribution of the linear multi-string GaN LED driving scheme while taking the effects of grid voltage fluctuations into account. In addition, we constructed a double-string GaN LED lighting system as a modular prototype with scalability. The experimental results exhibit high driving efficiency (~94% @380 V line voltage), high power factor (~0.952), flicker-free, and high reliability at a very low cost (~$0.005/W).

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Section: Introductionmentioning

confidence: 99%

Novel Pulsating-DC High-Voltage Linear Driving Scheme for GaN LED General Lighting

Zhang

Wang

et al. 2023

Electronics

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“…1. Power converters: The PWM rectifiers can convert AC/DC power into DC of various voltages in the application of power conversion [8,9]. 2.…”

mentioning

confidence: 99%

Research on High-Quality Control Technology for Three-Phase PWM Rectifier

Zhi

Song

et al. 2023

Electronics

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With the development of power-electronics technology, PWM rectifiers are widely used in many fields. They are especially suitable for high-precision- and high-efficiency-application scenarios, such as communication and industrial control. Although it has many advantages, overshoot control during startup is a challenge. Therefore, this paper first derives the input–output mathematical model through equation establishment and dq-coordinate transformation. Next, a voltage and current double closed-loop simulation model is established in MATLAB/Simulink, and its control effect is analyzed. On this basis, a new voltage-setting strategy is designed to reduce the output-voltage overshoot of the PWM rectifier when starting. The simulation results demonstrate that the strategy has a good application effect and can contain starting-voltage overshooting from 12.88% to 0.925%. Moreover, the principle of this strategy is simpler and easier to understand and implement compared with traditional strategies.

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Hybrid Modulated DCDC Boost Converter for Wearable Devices

Cited by 2 publications

References 28 publications

Novel Pulsating-DC High-Voltage Linear Driving Scheme for GaN LED General Lighting

Novel Pulsating-DC High-Voltage Linear Driving Scheme for GaN LED General Lighting

Research on High-Quality Control Technology for Three-Phase PWM Rectifier

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