Double-field orientation of unity power factor synchronous motor drive

Air gap field-oriented vector control strategy for high-power electrically excited synchronous motor based on full-order flux linkage observer

“…As control performance is largely depend on the accuracy of flux linkage, an accurate flux linkage model is crucial to control performance. In the literature (Szabo et al, 2010), an open-loop model is used to observe excitation, which is greatly influenced by the motor parameters; in the literature (Wu and Tan, 2010), a voltage-current model is adopted, with a filter for switchover to observe the flux linkage, but it is essentially a reduced-order model with limited properties. This paper raises a full-order flux linkage observer for the electrically excited synchronous motor based on the dynamic mathematical model of the electrically excited synchronous motor, thus making it possible to obtain accurate flux linkage value.…”