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

This paper raises a full-order flux linkage observer for the high-power electrically excited synchronous motor and proposes a design for its feedback matrix based on modern control theories which ensure excellent dynamic and static performances of this full-order flux linkage observer. On the basis of the said full-order flux linkage observer, an air gap field-oriented vector control strategy for the electrically excited synchronous motor based on the full-order flux linkage observer has been established and it is possible for the electrically excited synchronous motor to operate with the unity power factor. Through simulation and experiments, the effectiveness of the full-order flux linkage observer as well as the control strategy has been further verified.   Key words: Electrically excited synchronous motor, full-order flux linkage observer, air gap field-oriented vector control.