Behavior Investigation of Five-Phase Induction Machine Fed by Sine Voltage Using Three-to-Five Phase Transformer

This paper investigates the behavior of five-phase induction machine fed by sine voltage. A three-to-five phase transformer is used to provide five-phase sine voltage from three-phase voltage source. Dynamic model of five-phase induction machine is given, also equivalent circuits derived from symmetrical components are presented. These circuits can describe the machine behavior at steady state under balance and unbalance conditions. From the equivalent circuits' concept, a parameter identification method, using three-to-five phase transformer, is proposed to determine the machine parameters. The self-starting of the machine at no-load with different stator connections is examined. Also, the machine steady state behavior is examined under load when one phase and two adjacent phases are opened during operation. A fivephase induction machine prototype and three-to-five phase transformer are used in this investigation, while the stator currents are analyzed using symmetrical components.