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Undergraduate Senior Research Project To Develop A Computer Controlled Power Supply For Leds

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Conference

2007 Annual Conference & Exposition

Location

Honolulu, Hawaii

Publication Date

June 24, 2007

Start Date

June 24, 2007

End Date

June 27, 2007

ISSN

2153-5965

Conference Session

Project-Based Education in Energy Conversion

Tagged Division

Energy Conversion and Conservation

Page Count

10

Page Numbers

12.1511.1 - 12.1511.10

Permanent URL

https://peer.asee.org/3065

Download Count

40

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Paper Authors

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Richard Smith California State Polytechnic University-Pomona

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R. Frank Smith received his BSEE from New Mexico State University in 1965, MBA from Pepperdine University in 1974 and MSEE from Cal Poly Pomona in 1993. He has over 30 years industrial experience.

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Richard Cockrum California State Polytechnic University Pomona

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Richard Cockrum received his BSEE and ME from California State Polytechnic Univesity in 1973 and 1975.

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Phyllis Nelson California State Polytechnic University-Pomona

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Dr. Phyllis Nelson received her BSEE from Cal Poly University in 1977, her MS from California Institute of Technology in 1980 and her PhD from the University of California Los Angeles in 1990.

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Marvin Abrams California State Polytechnic University Pomona

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Marvin Abrams received his B.S. and M.S. in Chemistry from the University of Nevada and PhD. in Physical Chemictry from Washington State University. He spent 33 years in Aerospace industry.

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Abstract
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Undergraduate Senior Research Project to Develop a Computer Controlled Power Supply for LEDs

Abstract

This paper describes an active senior research project which is sponsored by the California Energy Commission under an Energy Innovation Small Grant Program (EISG). The goal of the research project is to establish and demonstrate the feasibility of producing a computer controlled power supply for large light emitting diode (LED) arrays. This is an endeavor to reduce energy consumption and costs compared to standard devices presently in use. These large arrays can consist of several thousand LEDs. The proposed investigation is directed at confirming the feasibility of designing an advanced computer controlled power supply for large parallel arrays of LEDs. It will control both the current and voltage being applied to the LED array. The investigation will endeavor to optimize the light effectivity, power consumption, and cost effectiveness for both daytime and nighttime operation.

Introduction

A senior project has been established to give students the opportunity to participate in real life research that is applicable to energy conservation in the State of California. This project will provide a capstone educational experience for senior students to enhance their ability to be initially productive professional engineers. The project team consists of three faculty in the Electrical and Computer Engineering (ECE) Department and four senior students. This project is due to be completed by the fall of 2007. This project will endeavor to establish and demonstrate the feasibility of producing a computer controlled power supply for large light emitting diode (LED) arrays. It will reduce energy consumption and costs compared to standard devices presently in use. These large arrays can consist of several thousand LEDs. It will control both the current and voltage being applied to the LED array. The investigation will endeavor to optimize the light effectivity, power consumption, and cost effectiveness for both daytime and nighttime operation. Major manufactures of LED arrays use series regulators which inevitability loose power in the Thevenin resistance in series with the LED array The student research will include the development, test, and comparative evaluation of alternate prototype LED circuit topologies. Parameters such as power factor (pf), conversion efficiency (η), total harmonic distortion (THD%), spectral illumination (Lumens), device temperature, and temperature degradation (Lumens/oC) will be measured.

Project Goals:

Smith, R., & Cockrum, R., & Nelson, P., & Abrams, M. (2007, June), Undergraduate Senior Research Project To Develop A Computer Controlled Power Supply For Leds Paper presented at 2007 Annual Conference & Exposition, Honolulu, Hawaii. https://peer.asee.org/3065

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