Primary-Side Peak Current Measurement Strategy for High-Precision Constant Output Current Control

Wu, Cheng-Nan; Chen, Yang-Lin

doi:10.1109/tpel.2014.2312955

Cited by 34 publications

(3 citation statements)

References 18 publications

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“…All electronic devices and circuits generate excess heat and require greater attention to avoid premature failures. The LEDs convert 15% of the applied energy into light and the remaining 85% into heat, this heat must be dissipated so that the durability and properties of the LEDs are not affected by the increase in temperature [10,[20][21][22][23][24].…”

Section: Discussionmentioning

confidence: 99%

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

Jesús¹,

Jesús²,

Unión-Sánchez³

et al. 2020

Energy Efficiency and Sustainable Lighting - A Bet for the Future

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Today LED technology is being imposed, day by day, in our cities and homes as an efficient way of lighting. The performance of its lighting, durability, energy efficiency, and light, coupled with the economy of its use, is shifting to other classic forms of lighting. However, some problems associated with the durability of equipment associated with thermal dissipation and high-temperature problems, which end up affecting the light intensity and service life, are beginning to be detected. The objective of this paper is to compare the results obtained previously, at different contour temperatures, with the current practical results obtained with a FLUKETI25 thermal imaging camera. The theoretical results will be compared with the current results applied to the different luminaires. Where real thermal dissipation is studied, it is obtained for each of them in the laboratory of illumination with the thermographic camera FLUKE TI. The theoretical and experimental results are evaluated, and the results are discussed. This study shows that instead of LED technology, it is less risky for quality depreciation and durability of lighting if a project has already been achieved that favors optimal thermal dissipation, supported by the importance of choosing an appropriate design and appropriate materials.

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Section: Discussionmentioning

confidence: 99%

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

Jesús¹,

Jesús²,

Unión-Sánchez³

et al. 2020

Energy Efficiency and Sustainable Lighting - A Bet for the Future

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show abstract

“…The 3DA output signal V A3 can be calculated by Equation (13). The voltage signal of ES output is collected by controlling AD7606 through FPGA and fine-tuned by logic operation of FPGA to finally achieve the purpose of providing high precision ES for the sensor.…”

Section: Design Of Es Auto-calibration Circuitmentioning

confidence: 99%

“…Soto‐Ocampo et al 12 proposed a low‐cost Raspberry Pi‐based data acquisition system with a high sampling frequency capacity for recording up to three channels and so on. Of course, some scholars have done research on data output cards; for example, Cheng‐Nan et al 13 proposed a strategy for measuring the peak primary‐side current of a high‐precision constant‐output current converter, which solves the problem of current inaccuracy that exists in conventional primary‐side regulator (PSR). Huang et al 14 proposed a carrier phase shift PWM control scheme combined with an H‐bridge cascade topology, which can effectively reduce the output voltage harmonic content of large power supplies and increase their capacity.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of high precision servo channel loading card for fatigue testing of aircraft wings

Zhao

Xiao

Shen

2023

Circuit Theory & Apps

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SummaryA servo channel loading card (SCLC) with high precision data acquisition and output is developed for static and fatigue testing of aircraft wings. A high‐performance processor field programmable gate array (FPGA) is at the core to control the excitation source (ES) output circuit to provide excitation for the force and displacement sensor. To improve the precision of the ES output circuit, a 3DA‐based ES auto‐calibration circuit is designed. Simulation results show that the 3DA improves the precision of the automatic calibration of the ES circuit. The sensor signals are collected through high precision analog channels, and the signals are automatically zero calibrated and numerical control gain processed. Ultimately, a voltage or current signal is generated through the drive circuit to control the electro‐hydraulic servo loading system to complete a high precision force loading test on the aircraft wings. The experimental results show that the board designed has high reliability in both acquisition and output. The ES output achieved a precision of 0.1375 mV/V, the precision of signal acquisition achieves a precision of −0.175 mV/V, and the servo drive output achieves a precision of −0.06 mV/V, meeting the expected design precision of 1 mV/V.

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A simple average current control with time‐length equality for primary‐side regulation flyback converter with constant output current control

Wang

Kou

et al. 2018

Circuit Theory & Apps

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Primary-side regulation (PSR) flyback converter is widely used in small power applications. To increase the output power, continuous conduction modulation mode is always introduced. In this paper, a simple average current control method with very low cost is proposed for constant current controlled PSR flyback converter in both continuous conduction modulation mode and discontinuous conduction modulation mode. The average current control method is realized with time-length equality by simply comparing the average current with switch current, such that analog-to-digital converter for current sampling in traditional average current control method is removed. In addition, to eliminate the subharmonic oscillation and keep low cost, a fixed switch-off time control with time-length compensation algorithm is used. To improve the output current accuracy, a hysteretic multimode control method is applied. The total control requires very low implementation costs that only contain a lowspeed Digital to analog converter (DAC), three comparators, and a digital controller. The performance of the proposed control method is experimentally verified on an Field-progrannable gate array (FPGA) controlled 3.8 to 16 V/3.8 A PSR flyback converter. In experiments, stable control and high output current accuracy are obtained, and the output current accuracy is within ±1.8% under universe line voltage and output load.

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Primary-Side Peak Current Measurement Strategy for High-Precision Constant Output Current Control

Cited by 34 publications

References 18 publications

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

Design and implementation of high precision servo channel loading card for fatigue testing of aircraft wings

A simple average current control with time‐length equality for primary‐side regulation flyback converter with constant output current control

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