Title :
The production of impulsive torques in a photovoltaic powered pumping system
Author :
Dunford, William G. ; Welder, L. ; Ward, P.R.B.
Author_Institution :
Dept. of Electr. Eng., Imperial Coll., London, UK
fDate :
29 Jun-3 Jul 1992
Abstract :
Methods of providing the high starting torque required in photovoltaic-powered progressive-cavity type pumping systems are discussed. It is shown that suitable impulsive torques can be obtained by using a reservoir capacity. The sizing of this capacitor is discussed in detail for a permanent magnet DC drive, and experimental verification is provided. It is shown that electromagnetic torque pulses in a photovoltaic powered DC drive can be satisfactorily predicted. For a specified armature resistance the peak value is proportional to the initial input voltage. The value of capacitance representing critical damping (4L/R) may be viewed as an optimum choice in terms of peak current/microfarad
Keywords :
DC motors; electric drives; permanent magnet motors; photovoltaic power systems; pumps; torque; water supply; armature resistance; capacitance; critical damping; electromagnetic torque pulses; impulsive torques; permanent magnet DC drive; photovoltaic powered pumping system; progressive-cavity type pumping; reservoir capacity; Capacitors; Drives; EMP radiation effects; Permanent magnets; Photovoltaic systems; Production; Reservoirs; Solar power generation; Torque; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE
Conference_Location :
Toledo
Print_ISBN :
0-7803-0695-3
DOI :
10.1109/PESC.1992.254811
