TY - GEN
T1 - Solid-state light simulator with current-mode control
AU - Bazzi, Ali M.
AU - Klein, Zach
AU - Sweeney, Micah
AU - Kroeger, Kevin
AU - Shenoy, Pradeep
AU - Krein, Philip T
PY - 2011/5/13
Y1 - 2011/5/13
N2 - This paper presents an efficient, low-cost, versatile LED-based light simulator intended to produce a well-characterized spectrum for tests of solar cells and other photosensitive devices. Three major design aspects are addressed: LED spectra, power converters for LED drive, and control. Visible light emulating a standard solar spectrum is used as a test application using six LED colors. The number of LEDs and their placement for uniformity are addressed. Independent control of the six colors can simulate a range of different light sources and solar spectra. Boost converters under current-mode control are used to achieve reproducible LED brightness through adjustable currents, or equivalent radiant flux commands. Spectral uniformity tests verify that the system achieves standard uniformity requirements over an area of 100mmx100mm in simulations, and 100mmx50mm in experiments. The system is much less costly than available spectral test equipment. Current-mode controllers successfully maintain the desired illumination commands with low steady-state error and ripple, at converter efficiencies exceeding 93%.
AB - This paper presents an efficient, low-cost, versatile LED-based light simulator intended to produce a well-characterized spectrum for tests of solar cells and other photosensitive devices. Three major design aspects are addressed: LED spectra, power converters for LED drive, and control. Visible light emulating a standard solar spectrum is used as a test application using six LED colors. The number of LEDs and their placement for uniformity are addressed. Independent control of the six colors can simulate a range of different light sources and solar spectra. Boost converters under current-mode control are used to achieve reproducible LED brightness through adjustable currents, or equivalent radiant flux commands. Spectral uniformity tests verify that the system achieves standard uniformity requirements over an area of 100mmx100mm in simulations, and 100mmx50mm in experiments. The system is much less costly than available spectral test equipment. Current-mode controllers successfully maintain the desired illumination commands with low steady-state error and ripple, at converter efficiencies exceeding 93%.
KW - LED light simulator
KW - Solar simulator
KW - current mode control
KW - solid-state lighting
UR - http://www.scopus.com/inward/record.url?scp=79955759861&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955759861&partnerID=8YFLogxK
U2 - 10.1109/APEC.2011.5744878
DO - 10.1109/APEC.2011.5744878
M3 - Conference contribution
AN - SCOPUS:79955759861
SN - 9781424480845
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 2047
EP - 2053
BT - 2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
T2 - 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Y2 - 6 March 2011 through 10 March 2011
ER -