Memorias de investigación
Communications at congresses:
Variable impedance LED matrix control system for lamps in PV applications
Year:2013
Research Areas
  • Electronic technology and of the communications
Information
Abstract
The ¡nterest 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.
International
Si
Congress
3rd Small PV- Applications Rural Electrification and Commercial Use-
960
Place
Ulm, Germany
Reviewers
Si
ISBN/ISSN
978-3-943891-17-1
Start Date
17/06/2013
End Date
18/06/2013
From page
117
To page
122
3rd Small PV- Applications Rural Electrification and Commercial Use-
Participants
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: SISTEMAS FOTOVOLTÁICOS
  • Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Ingeniería de Circuitos y Sistemas