Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | IET Digital Library |
|---|---|
| Author | Liu, Junfeng Tian, Hanlei Zeng, Jun |
| Abstract | Current sharing among light-emitting diode (LED) strings is significant for reliability and long life. The capacitive balancing was widely used with low losses and small volume. However, the capacitive balancing scheme adopting the impedance matching causes large circulating current, and its precision of current sharing is restricted due to impedance tolerance. In addition, the high reactive power with pulse frequency control brings high power stress on the volt-ampere rating (VAR) of the half-bridge switches and arouses heavy electro-magnetic interference. In this study, the interleaved structure of the upper and lower half-bridge is proposed to alleviate the mismatching of capacitance impedance. Besides, the wide range of LED dimming capability is accomplished by using the switched-controlled capacitor (SCC) unit with the constant frequency of power switches. The circuit analysis, SCC modulation, current sharing, LED dimming and performance comparisons are examined in detail. All the superior performance of the proposed LED driver is verified by simulation prototype and experimental platform with four-channel LED strings and rated power of 23 W. The accordance of theoretical analysis, simulation waveforms and experiment results further confirms the feasibility of the proposed LED driver. |
| Starting Page | 1991 |
| Ending Page | 1999 |
| Page Count | 9 |
| ISSN | 17554535 |
| Volume Number | 11 |
| e-ISSN | 17554543 |
| Issue Number | Issue 12, Oct (2018) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/11/12 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5008 |
| Journal | IET Power Electronics |
| Publisher Date | 2018-06-27 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Capacitance Impedance Capacitive Balancing Scheme Capacitor Control of Electric Power System Current Control Driver Circuit Electric Current Control Electromagnetic Interference Four-channel LED Strings Frequency Control Half-bridge Switches Heavy Electro-magnetic Interference High Power Stress High Reactive Power LED Dimming Capability Light Emitting Diode Light-emitting Diode Multichannel LED Driver Pulse Circuit Pulse Frequency Control Reactive Power Control Simulation Prototype SSC Switched-controlled Capacitor Unit |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|