scholarly journals Dimmable LED Driver For DC Distributed Lighting System

2020 ◽  
Author(s):  
Mohammad Meraj ◽  
Syed Rahman ◽  
Atif Iqbal ◽  
Lazhar Ben Brahim
Keyword(s):  
Distribution Systems ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Road Transport ◽  
Maximum Efficiency ◽  
Lighting System ◽  
Led Driver ◽  
Lighting Systems ◽  
Industrial Lighting

This abstract proposes a high brightness, high efficiency, dimmable LED driver based on linear current regulator technology for DC grid distribution systems. The proposed driver has excellent characteristics like the highest lumen per watt, long lifetime, high reliability, compact, low cost, both environmental and user-friendly which makes it suitable for lighting applications. Steady state and small-signal models of the proposed driver are performed which help in minimizing ground current and accurate compensator design, respectively. These two modeling approaches result in the optimization of both the footprint and cost of the driver. The performance of the proposed experimental prototype of the 20W driver is developed to validate the performance at different dimming levels and achieves maximum efficiency of 97%. The applications of the proposed converter are: dimmable home lighting system, advertisement boards and hoardings, industrial lighting systems, road transport indication lamps, indoor and outdoor stadium lighting, automatic street lighting, decorative systems, health appliances and auditoriums and many more.

Evaluation of a Low-Cost Permanent Emergency Lighting System Based on High-Efficiency LEDs

2005 ◽  
Vol 41 (5) ◽  
pp. 1386-1390 ◽  
Author(s):  
M. Rico-Secades ◽  
A.J. Calleja ◽  
J. Ribas ◽  
E.L. Corominas ◽  
J.M. Alonso ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Lighting System

scholarly journals Technologies for Distributed Generation: key performance factors for industrial application

2018 ◽  
pp. 80-87 ◽  
Author(s):  
G. G. Nalbandyan ◽  
S. S. Zholnerchik
Keyword(s):  
Distributed Generation ◽  
Electricity Market ◽  
Smart Grids ◽  
Large Scale ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Retail Trade ◽  
Economic Effects ◽  
The Cost

The reduction in the cost of technologies for distributed generation involves an increasing decentralization of power generation and large-scale development of distributed sources around the world. This trend is a key change in both the characteristics of electricity consumption: it is becoming increasingly flexible and mobile, and the patterns of consumer behavior in the electricity market. Electricity consumers are becoming at the same time its suppliers and require revision of traditional regulation standards of the electricity market. The purpose of the article is to assess the influence of distributed generation on the economy of both enterprises and the country as a whole. To identify the effects of the introduction of distributed generation technologies, the method of case study analysis is used. The empirical analysis was carried out on the basis of twelve Russian companies that use their own energy sources. The selected companies belong to the following industries: industrial production, housing and communal services, retail trade, construction, agriculture. Technological and economic effects are revealed. Technological ones include: improving consumer reliability, energy security, involving local energy resources, optimizing load management and redundancy, providing the flexibility of smart grids (in terms of generation), reducing the load on the environment, including CO2 emissions. Economic effects: optimization of the load schedule, reduction of losses in the process of transmission/distribution of energy, expansion of cogeneration, etc., providing the consumer with the electricity of a given quality, saving losses in networks, reducing the cost of energy. The identified effects of the introduction of distributed generation technologies make it possible to highlight the advantages of regeneration facilities: high efficiency and the possibility of cogeneration and trigeneration, individual maneuvering capacity loading, high reliability of equipment, low cost of transportation of electricity, fuel usage of the by-products and the main production waste. In conclusion, recommendations are formulated on a set of measures for the development of industrial distributed generation in Russia at the Federal level.

The Design for Automatic Target Reporting System Based on Image Processing

2013 ◽  
Vol 756-759 ◽  
pp. 3446-3449
Author(s):  
Zhi Hui Xu ◽  
Wei Zhong Li ◽  
Yong Jun Xiao
Keyword(s):  
Image Processing ◽  
High Efficiency ◽  
Reporting System ◽  
High Reliability ◽  
Low Cost ◽  
The Way

Photo-electricity target with low cost, high efficiency and high reliability is widely used for gunnery training in military affairs and athletic sports. The automatic target reporting system based on image processing is constructed and some experimental is done. The result is shown that compared to the way of manual target, automatic target reporting system has the character of easy to operate, low-cost and easy to popularize.

Proposal of High-Quality Laser Hardening System for Shaft Parts Using Cylindrical Mirror and Ring-Beam Shaped by High-Speed Laser Scan System

2020 ◽  
Author(s):  
Hirotaka Tanabe ◽  
Keiji Ogawa ◽  
Heisaburo Nakagawa ◽  
Hirohito Tsukada ◽  
Yuki Goto
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
High Speed ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Treatment Method ◽  
Post Processing ◽  
High Quality ◽  
Almost All

Abstract Shaft parts are important parts used in almost all machines including automobiles. In addition, extremely high reliability is required since a shaft failure is directly linked to a fatal machine trouble. Therefore, a hardening process is usually conducted to improve strength and wear resistance. In this study, we propose a new laser heat treatment method to produce high-quality and high-accuracy shafts with high efficiency, low cost and low environmental impact. We will also develop a technique to derive the appropriate laser irradiation conditions quickly and systematically for shafts with various shapes and dimensions. There are the other hardening techniques including the electric furnace method and the induction method. These methods require post-processing for deformation correction, whereas the proposed method uses a laser to achieve thermal deformation-free hardening, eliminating the need for the post-processing. As a result, an improvement in yield can be expected due to a reduction of the products that cannot be corrected after heat treatment, which had to be waste disposed with conventional methods. By using our method, the entire circumference of the shaft was hardened by using a ring-shaped laser beam and a cylindrical inner mirror. Here, the ring-shaped laser beam was formed by high-speed scanning of a spot shapelaser. In the present paper, the details of this system were introduced and some experimental results were described.

A Novel Synchronous Current-Doubler Rectifier for LED Drivers Without Electrolytic Capacitors

2019 ◽  
Vol 28 (10) ◽  
pp. 1950175
Author(s):  
Jianguang Ma ◽  
Xueye Wei ◽  
Liang Hu ◽  
Junhong Zhang
Keyword(s):  
High Efficiency ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Electrolytic Capacitor ◽  
Storage Capacitor ◽  
Led Driver ◽  
Large Space ◽  
Light Emitting ◽  
Short Lifespan ◽  
Led Drivers

High-brightness light-emitting diode (LED) lamps have attracted much attention because of their high efficiency, simple structure, energy conservation and environmental protection aspects, and long lifetime. Thus, an LED driver must have a long lifespan, high density, and compact space. However, conventional LED power supplies use an electrolytic capacitor as the storage capacitor in the holdup time, which has a short lifespan and occupies large space. In this paper, a novel synchronous current-doubler rectifier (SCDR) method is proposed as an LED driver. The reasonably designed circuit is used to control the output voltage ripple in the normal range without adding a complicated control circuit. The proposed topology is designed using few components, has no electrolytic capacitor, and has a low cost for high-output current LED driver applications. Circuit operating principles and detailed theoretical analysis are provided in this paper. A 200-W prototype has been established and tested, and the experimental results are presented to highlight the merits of the proposed circuit.

Study on a New Array of Oscillating Wave Energy Converter

2014 ◽  
Vol 672-674 ◽  
pp. 432-435 ◽  
Author(s):  
Meng Shao ◽  
Hong Da Shi ◽  
Fei Fei Cao ◽  
Kai Zhu ◽  
Zheng Quan Zhang ◽  
...  
Keyword(s):  
Wave Energy ◽  
High Efficiency ◽  
High Reliability ◽  
Low Cost ◽  
Wave Energy Converter ◽  
Design Parameters ◽  
New Wave ◽  
Energy Converter ◽  
On Demand ◽  
Converter Unit

The paper presents a new array of oscillating wave energy converter, which is in accordance with nowadays’ research tendency of China: high power, high efficiency, high reliability and low cost. The paper gives the design scheme and design parameters of the new wave energy converter. It's composed of the wave energy converter unit, which can be assembled to arrays based on demand. Besides, the paper analyzes the power generation principle and advantages of the device. The research results could be a reference for wave energy’s exploration and utilization.

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