Consideration of Current Displacement in Rotor Bars of Soft Starting Induction Machines

摘要

This paper deals with squirrel cage induction machines and their modeling concerning the appearance of current displacement in rotor bars. In non-steady-state operation such as direct on-line start this effect has to be considered. Also in the case of sustaining non-steady-state operation, e.g. by using soft starters (thyristor controlled AC voltage regulator), an accurate calculation of current and torque is required. Different calculation methods are pointed out and an appropriate calculation algorithm for implementation in MATLAB is described. Simulation results demonstrate the benefit of this model in conjunction with soft starters.