Static frequency converter- fed square- wave current induction motors, (Die umrichtergespeiste Asynchronmaschine im Betrieb mit eingepraegten Rechteckstroemen)

A study is made of the steady- state performance of the motor when operated with impressed stator current and constant air gap flux. On the basis of the single- phase equivalent circuit diagram of the motor, the locus diagram of the primary current is derived as a function of the secondary frequency, while the locus diagrams of the primary voltage are derived at any given primary and secondary frequency. Reference is made to the influence of current and voltage harmonics.