선형 영구자석 동기전동기 구동장치의 진동억제를 위한 노치필터 자동조정

Automatic Tuning of Notch Filter to Suppress Oscillations in a PMLSM Drive

This paper deals with an automatic tuning method of the notch filter to suppress oscillations in a permanent magnet linear synchronous motor(PMLSM) drive. First, it saves automatically the reference torque-component current when oscillations are detected. Then the oscillation frequency of the saved data is calculated by using the fast Fourier transform(FFT) algorithm. And also the Hanning function is used to reduce the leakage components due to the aperiodic measurement data. Finally, the proposed method tunes the notch filter to suppress oscillations. Experimental results on the test rig show the validity of the proposed method.