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Title: Amorphous silicon cell array powered solar tracking apparatus

Abstract

An array of an even number of amorphous silicon solar cells are serially connected between first and second terminals of opposite polarity. The terminals are connected to one input terminal of a DC motor whose other input terminal is connected to the mid-cell of the serial array. Vane elements are adjacent the end cells to selectively shadow one or the other of the end cells when the array is oriented from a desired attitude relative to the sun. The shadowing of one cell of a group of cells on one side of the mid-cell reduces the power of that group substantially so that full power from the group of cells on the other side of the mid-cell drives the motor to reorient the array to the desired attitude. The cell groups each have a full power output at the power rating of the motor. When the array is at the desired attitude the power output of the two groups of cells balances due to their opposite polarity so that the motor remains unpowered.

Inventors:
 [1]
  1. (Lawrenceville, NJ)
Issue Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
OSTI Identifier:
865691
Patent Number(s):
4556788
Assignee:
RCA Corporation (Princeton, NJ) NREL
DOE Contract Number:  
EG-77-C-01-4042
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
amorphous; silicon; cell; array; powered; solar; tracking; apparatus; cells; serially; connected; terminals; opposite; polarity; input; terminal; dc; motor; mid-cell; serial; vane; elements; adjacent; selectively; shadow; oriented; desired; attitude; relative; sun; shadowing; reduces; power; substantially; drives; reorient; output; rating; balances; due; remains; unpowered; input terminal; serially connected; opposite polarity; power output; amorphous silicon; solar cell; solar cells; silicon solar; solar tracking; dc motor; cell array; tracking apparatus; silicon cell; cell reduces; power rating; /250/126/136/

Citation Formats

Hanak, Joseph J. Amorphous silicon cell array powered solar tracking apparatus. United States: N. p., 1985. Web.
Hanak, Joseph J. Amorphous silicon cell array powered solar tracking apparatus. United States.
Hanak, Joseph J. Tue . "Amorphous silicon cell array powered solar tracking apparatus". United States. https://www.osti.gov/servlets/purl/865691.
@article{osti_865691,
title = {Amorphous silicon cell array powered solar tracking apparatus},
author = {Hanak, Joseph J.},
abstractNote = {An array of an even number of amorphous silicon solar cells are serially connected between first and second terminals of opposite polarity. The terminals are connected to one input terminal of a DC motor whose other input terminal is connected to the mid-cell of the serial array. Vane elements are adjacent the end cells to selectively shadow one or the other of the end cells when the array is oriented from a desired attitude relative to the sun. The shadowing of one cell of a group of cells on one side of the mid-cell reduces the power of that group substantially so that full power from the group of cells on the other side of the mid-cell drives the motor to reorient the array to the desired attitude. The cell groups each have a full power output at the power rating of the motor. When the array is at the desired attitude the power output of the two groups of cells balances due to their opposite polarity so that the motor remains unpowered.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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