Simple electro-optically controlled dual-axis sun tracker

This paper describes the design of a sun tracker which uses two electro-optic sensors and a small, low-cost electronic control circuit. One sensor is a four-cell pyramid which is mounted on the tracker plane. The second sensor is a sunlight beam sensor which is fixed facing south. The control circui...

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Veröffentlicht in:	Solar energy 1990, Vol.45 (2), p.65-69
Hauptverfasser:	Lynch, William A., Salameh, Ziyad M.
Format:	Artikel
Sprache:	eng
Schlagworte:	140600 - Solar Energy- Photovoltaic Power Systems 141000 - Solar Collectors & Concentrators ACCURACY Applied sciences CAPTEUR SOLAIRE COLECTORES SOLARES CONCEPTION CONTROL EQUIPMENT DESIGN DIAGRAMS DISENO ELECTRONIC CIRCUITS ELECTRONIC EQUIPMENT Energy EQUIPEMENT EQUIPO Exact sciences and technology FIELD EFFECT TRANSISTORS FLOWSHEETS HELIOSTATS MOS TRANSISTORS MOSFET MOTORS Natural energy OPERATION OPTICAL EQUIPMENT PERFORMANCE TESTING PHOTOVOLTAIC POWER SUPPLIES POWER SUPPLIES SEMICONDUCTOR DEVICES SOLAR CELL ARRAYS SOLAR COLLECTORS SOLAR ENERGY SOLAR EQUIPMENT Solar thermal conversion SOLAR TRACKING SOLAR TRACKING SYSTEMS TESTING TRACKING TRANSISTORS
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Beschreibung
Zusammenfassung:	This paper describes the design of a sun tracker which uses two electro-optic sensors and a small, low-cost electronic control circuit. One sensor is a four-cell pyramid which is mounted on the tracker plane. The second sensor is a sunlight beam sensor which is fixed facing south. The control circuit tracking resolution is within 0.1 degrees. This system minimizes wandering on partially overcast days. It will never make multiple revolutions or face down towards the ground. Power MOSFETS ( M etal O xide S emiconductor F ield E ffect T ransistors) are used to drive high-torque DC gearbox motors.
ISSN:	0038-092X 1471-1257
DOI:	10.1016/0038-092X(90)90029-C