A dynamic model for the investigation of twisting effect in long flux‐ switchingPMmotors inESPs

Abstract

Shaft twisting occurs along the length of electric motors rotors. The twisting depends on the shaft properties and the transmitted torque. In Electrical Submersible Pumps, due to the high ratio of length to the diameter of the motor and the high load torque, the twisting effect occurs significantly. Thus, when such a condition emerges for an electric motor, the electromagnetic torque is not uniformly produced along the motor length, since shaft twisting results in rotor position variation with respect to the stator. Therefore, the twisting and

A Review on Electrical Submersible Pumping System

“…The twisting effect means that there is a difference in the angle between the beginning and the end of the shaft. This effect causes a decrease in the produced torque [35]. The use of a low-voltage cable is not possible with a significant depth because an increase in the ampere transmitted by the cable leads to an increase in the conductor diameter.…”