Induction Motors Behavior Under Non Sinusoidal Voltage Supply Condition and Assessment of its Damages in Iran Network

Abstract—An induction motor behaviors in low power quality condition is presented in this paper. Simulations are done for both ideal supply and non proper supply conditions. In this paper, we use two case study including one 3hp (small range) motor and one 50hp (medium range) motor and effects of non ideal supply voltage on motors characteristics are studied. Efficiency reduction, increase in motors temperature and oscillations in steady state torque are some of most important issues of this phenomena. Considering the traditional derating on induction motors in such situations and motors efficiency reduction and other effects of non sinusoidal supply on induction motors, the harmfulness of this type of supply on Iran network (considering abundant usage of induction motors) has been calculated and the importance of preventing non sinusoidal supply is illustrated. Index Terms — harmonic, induction motor, non sinusoidal, torque I