Low-speed sensorless field-oriented control of asynchronous machine based on adaptive flux error suppression method

In this paper, the sensorless field-oriented control of asynchronous machine with squirrel-cage rotor (AMS) at the low-speed operation will be observed. The identification of rotor speed from adaptive flux error as well as the adaptation mechanism will be investigated. At first, the background of model reference adaptive system (MRAS) will be revised. Later, the mathematical model of AMS in the stationary reference frame will be presented for decoupling of flux term. After that, the adaptive scheme based on relevant flux terms will be presented. One as a reference model and one another as an adaptive model. Finally, the simulation result based on defined parameters will be discussed.