Force ripples suppression of tubular transverse flux and flux reversal linear permanent magnet motor based on ADRC

Abstract

The tubular transverse-flux and flux-reversal linear permanent magnet motor (TTF-FRLM) is a relatively novel linear machine which has approximate sinusoidal back-EMF waveform and high thrust force density. Because of its salient pole structure in the secondary, the force ripple is relatively large which is not conductive to high performance applications. New approach for suppressing force ripples is proposed in this paper, which is based on active disturbance rejection control and harmonic spectrum analysis of detent force. It is possible to take advantages of detent force characteristic and uncertain disturbances estimation to achieve better performance. The effectiveness of proposed method is verified by simulation results.