A High-Efficiency AC-to-DC Adaptor With a Low Standby Power Consumption

Lo, Yu‐Kang; Yen, Shang-Chin; Lin, Chung-Yi

doi:10.1109/tie.2007.907673

Cited by 79 publications

(20 citation statements)

References 11 publications

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“…Therefore the International Energy Agency (IEA) has proposed a "1-watt plan", the participating countries seek to lower standby power less than 1 watt in all products by 2010 [8]. Therefore, some techniques, including (1) pulse skipping [9], (2) burst mode [10][11], (3) off time modulation [12][13], are applied to the power converters for reducing standby power losses.…”

Section: Table I Summary Of Current Solutionsmentioning

confidence: 99%

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

Chen

Lai

2009

2009 IEEE Energy Conversion Congress and Exposition

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The main theme of this paper is to propose switching method to reduce the loss of phase-shift controlled full-bridge converter under light load and standby conditions. It will be shown that the efficiency can be improved using the proposed switching control technique. The presented switching control technique controls the full-bridge converter by PWM switching mode under light load condition and PWM switching with burst mode under standby condition. The transition point between phase-shift switching method and the proposed method is investigated and confirmed by experimental results.An FPGA-based digital-controlled experimental system has been set up. The specifications of the converter include: input voltage = 400 V, output voltage = 12V and output power = 400 W. Experimental results show that the efficiency improvement can be up to 26% under light load condition and the standby power is less than 1 W. These results confirm the effectiveness of the proposed switching control technique.

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Section: Table I Summary Of Current Solutionsmentioning

confidence: 99%

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

Chen

Lai

2009

2009 IEEE Energy Conversion Congress and Exposition

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“…On the other hand, controlling the outputs of boost acdc converters demands modeling the input-side and the output side. Such demands may complicate the control implementation, and utilization in industrial applications [5], [12], [14].…”

Section: Introductionmentioning

confidence: 99%

The analysis and development of controlled 3φ wavelet modulated AC-DC converter

Saleh

Rahman

2012

2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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This paper presents the analysis, development and performance testing of a new method for controlling three phase wavelet modulated ac-dc converters. The wavelet modulation is constructed as a nondyadic type multiresolution analysis (MRA), which has an analysis part to create three sets of groups of nonuniform recurrent samples from a reference dc signal. The constructed non-dyadic MRA has a synthesis part that generates switching signals for operating the ac-dc converter to synthesize the reference dc signal on its output side. The energy concentrated in the dc output is dependent on levels of resolution of the non-dyadic MRA. Adjusting the sequence of levels of resolution can vary the dc output of the wavelet modulated ac-dc converter. The resolution-level controller is implemented for simulation performances under different operating conditions. Test results show that the proposed controller can adjust the output dc voltage effectively with negligible impacts on the input harmonic contents and power factor.Keywords: Three phase voltage source 6-pulse ac-dc converters, wavelet transforms and the sampling theorem.where S Mr (t) is the reconstructed signal on the 3φ acdc converter.

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“…For the DC/DC conversion stage, several converters based on the HB topology can be considered. Among them, LLC resonant HB converter is the most attractive candidate for the back-end stage [2], [3]. It is a modified LC series resonant converter implemented by placing a shunt inductor across the transformer primary winding.…”

Section: Introductionmentioning

confidence: 99%

Two-stage AC/DC converter employing load-adaptive link-voltage-adjusting technique with load power estimator for notebook computer adaptor

Choi

Ryu

Moon

2009

2009 IEEE Energy Conversion Congress and Exposition

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This paper proposes a two-stage configuration of AC/DC converter employing load-adaptive link-voltageadjusting technique with load power estimator. The proposed technique helps to maintain high efficiency over all the load condition despite the output voltage varies according to the load power. In addition, since the proposed circuit uses low-loss load power estimator to adjust the output voltage, it can achieve high power density more than 14W/in 3 . Experimental results with 80W notebook computer adaptor are provided to verify the validity of the proposed converter.Index Terms-AC/DC converter, two-stage configuration, output voltage variation.

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A High-Efficiency AC-to-DC Adaptor With a Low Standby Power Consumption

Cited by 79 publications

References 11 publications

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

The analysis and development of controlled 3φ wavelet modulated AC-DC converter

Two-stage AC/DC converter employing load-adaptive link-voltage-adjusting technique with load power estimator for notebook computer adaptor

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A High-Efficiency AC-to-DC Adaptor With a Low Standby Power Consumption

Cited by 79 publications

References 11 publications

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

Novel dual mode operation of phase-shifted full bridge converter to improve efficiency under light load condition

The analysis and development of controlled 3&#x03C6; wavelet modulated AC-DC converter

Two-stage AC/DC converter employing load-adaptive link-voltage-adjusting technique with load power estimator for notebook computer adaptor

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The analysis and development of controlled 3φ wavelet modulated AC-DC converter