Thyristor-controlled AC Electric Drive for Rocker Machines.

Experimental studies have shown that rpm control of the electric motor during the operating cycle of a deep well pumping system according to a harmonic law makes it possible to equalize the load diagram of the electric drive. This decreases the rated power of the motor, reduces losses, increases the efficiency and power coefficient, eliminates negative tangential forces and, consequently, improves the electric power supply quality and the reliability of the electrical equipment operation.