Variable impedance LED matrix control system for lamps in PV applications

Gago Calderón, Alfonso and Fernández Ramos, José and Pineda Moldes, Iván and Narvarte Fernández, Luis (2013). Variable impedance LED matrix control system for lamps in PV applications. In: "3rd Symposium Small PV Applications - Rural Electrification and Commercial Use", 17/06/2013 - 18/06/2013, Ulm, Germany. ISBN 9783943891171. pp. 117-122.

Description

Title: Variable impedance LED matrix control system for lamps in PV applications
Author/s:
  • Gago Calderón, Alfonso
  • Fernández Ramos, José
  • Pineda Moldes, Iván
  • Narvarte Fernández, Luis
Item Type: Presentation at Congress or Conference (Article)
Event Title: 3rd Symposium Small PV Applications - Rural Electrification and Commercial Use
Event Dates: 17/06/2013 - 18/06/2013
Event Location: Ulm, Germany
Title of Book: 3rd Symposium Small PV-Applications : rural electrification and commercial use ; Ulm, Germany, June 17th/18th, 2013
Date: 2013
ISBN: 9783943891171
Subjects:
Faculty: Instituto de Energía Solar (IES) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The interest in LED lighting has been growing recently due to the high efficacy, lifelime and ruggedness that this technology offers. However the key element to guarantee those parameters with these new electronic devices is to keep under control the working temperature of the semiconductor crystal. This paper propases a LED lamp design that fulfils the requ irements of a PV lighting systems, whose main quality criteria is reliability. It uses directly as a power supply a non·stabilized constant voltage source, as batteries. An electronic control architecture is used to regulate the current applied to the LEO matri)( according to their temperature and the voltage output value of the batteries with two pulse modulation signals (PWM) signals. The first one connects and disconnects the LEOs to the power supply and the second one connects and disconnects several emitters to the electric circuit changing its overall impedance. A prototype of the LEO lamp has been implemented and tested at different temperaturas and battery voltages.

More information

Item ID: 26480
DC Identifier: http://oa.upm.es/26480/
OAI Identifier: oai:oa.upm.es:26480
Deposited by: Memoria Investigacion
Deposited on: 08 Jun 2014 11:37
Last Modified: 19 May 2017 12:33
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