쇄교자속관측기를 이용한 저속 영역에서의 표면부착형영구자석 동기전동기의 토크 오차 보상기법
Torque error compensation of SPMSM drives with a stator flux linkage observer at low speed
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초록
본 논문은 저속 운전을 포함한 영구자속의 자속 추정을 통하여 Permanent Magnet Synchronous Motor(PMSM)의 토크오차를 보상하는 기법에 대해 기술한다. 영구자속의 자속은 온도에 따라 변화한다. 동손을 최소화하기 위해 적용되는Maximum Torque per Ampere (MTPA)는 영구자속의 자속 추정값을 이용하여 구현되기 때문에 영구자석의 자속이 변화할경우, 토크 오차가 발생한다. 본 논문에서는 쇄교자속관측기를 이용하여 영구자석의 자속을 실시간으로 추정하여 제어알고리즘에 적용함으로써 토크 오차를 보상하는 기법을 제안한다. 제안된 기법은 시뮬레이션과 실험을 통하여 검증하였다.
Abstract
A compensation algorithm targeting for torque development from a SPMSM including a low speed operation ispresented in this paper. As known, PM flux linkage in SPMSM is varied by temperature. Maximum Torque per Ampere(MTPA) uses the calculated PM flux linkage, and torque error occurs due to change of PM flux linkage. In themanuscript, estimated PM flux linkage is obtained using a stator flux observer. The torque error is corrected using theestimated PM flux linkage. The proposed algorithm is implemented and verified in simulation and experiment.
참고문헌 (8)
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