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Magnification of starting torques of dc motors by maximum power point trackers in photovoltaic systemsA calculation of the starting torque ratio of permanent magnet, series, and shunt-excited dc motors powered by solar cell arrays is presented for two cases, i.e., with and without a maximum-power-point tracker (MPPT). Defining motor torque magnification by the ratio of the motor torque with an MPPT to the motor torque without an MPPT, a magnification of 3 for the permanent magnet motor and a magnification of 7 for both the series and shunt motors are obtained. The study also shows that all motor types are less sensitive to solar insolation variation in systems including MPPTs as compared to systems without MPPTs.
Document ID
Document Type
Conference Paper
Appelbaum, J.
(NASA Lewis Research Center Cleveland, OH, United States)
Singer, S.
(Colorado, University Colorado Springs, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Electronics And Electrical Engineering
Meeting Information
IECEC-89(Washington, DC)
Accession Number
Distribution Limits

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