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System for determining the current-voltage characteristics of a photovoltaic array

  • US 4,129,823 A
  • Filed: 11/03/1977
  • Issued: 12/12/1978
  • Est. Priority Date: 11/03/1977
  • Status: Expired due to Term
First Claim
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1. A system for determining the current-voltage characteristics of a photovoltaic array, comprising:

  • a flash lamp mounted to illuminate said photovoltaic array at a pulsed rate,a separate photosensor also mounted so as to be illuminated by said pulsed flash lamp,comparator means, connected to said photosensor, for providing a gate pulse each time that the illumination level striking said photosensor reaches a preselected level,nonlinear load means for providing successively different load impedance values across said photovoltaic array, andsampling means for sampling the current and voltage from said photovoltaic array at each of said successive load values, said sampling means being enabled by said gate pulse.

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