Static frequency converter that controls an induction motor

Autor/autori: Al. ALEXANDRESCU, D. ALEXA, T. GORAŞ

Abstract: This paper presents a static frequency converter that controls an induction motor according to the principle V/f = constant. Unlike the classic V/f control scheme, the proposed method insures high dynamic performances from the adjustable speed drive system. The solution is based on certain behavior of the PWM self-control inverter in a transient state, which feeds the induction motor, thus simplifying the control circuit. In conclusion, the self-control method for the induction machine fed by inverter consist in controlling in conduction mode only two power transistors or GTO thyristors for the pause durations of phase voltage pulses, when these voltages should be 0

Keywords: pulse with modulation, induction machine, AC/DC/AC converter, dynamic performances

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