Matching of a dc motor to a photovoltaic generator using a step-up converter with a current-locked loop

Journal Article · Mon Feb 28 23:00:00 EST 1994 · IEEE Transactions on Energy Conversion (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/60.282492· OSTI ID:7023504

Alghuwainem, S M ^[1]

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1. King Saud Univ., Riyadh (Saudi Arabia)

A photovoltaic (PV) generator is a nonlinear device having insolation-dependent volt-ampere characteristics. Because of its relatively high cost, the system designer is interested in optimum matching of the motor and its mechanical load to the PV generator so that maximum power is obtained during the entire operating period. However, since the maximum-power point varies with solar insolation, it is difficult to achieve an optimum matching that is valid for all insolation levels. In this paper it is shown that for maximum power, the generator current must be directly proportional to insolation. This remarkable property is utilized to achieve insolation-independent optimum matching. A shunt dc motor driving a centrifugal water pump is supplied from a PV generator via a step-up converter whose duty ratio is controlled using a current-locked feedback loop.

• OSTI ID: 7023504
• Journal Information: IEEE Transactions on Energy Conversion (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Energy Conversion (Institute of Electrical and Electronics Engineers); (United States) Vol. 9:1; ISSN 0885-8969; ISSN ITCNE4
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140600* -- Solar Energy-- Photovoltaic Power Systems
CONTROL THEORY
ELECTRIC MOTORS
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
MOTORS
PHOTOVOLTAIC POWER SUPPLIES
POWER SUPPLIES
PUMPS
SIZING
SOLAR EQUIPMENT