Effects of Initial Voltage Phase Angle and Rotor Position on the Starting Performance of an Induction Motor with the Smith Connection

摘要

This paper investigates the factors that affect the transient run-up performance of a three-phase induction motor with the Smith connection A time-stepping, coupled circuit, two-dimensional finite element method is used for the study. It is found that for certain rotor positions, short durations of speed reversal could happen. It is also found that severe torque oscillations at low speeds could be excited when the single-phase voltage is applied at a positive zero-crossing instant. Optimum initial rotor position for satisfactory starting has been identified.