Current Harmonic Suppression of BLDC Motor Utilizing Frequency Adaptive Repetitive Controller

Compared to the proportional-integral strategy, repetitive control strategy possesses high suppression ability for alternating current (AC) harmonics of signals. Thus, RC controllers are widely used in closed-loop systems suppress periodic harmonics. In order further improve brushless DC (BLDC) motor operation performance, a frequency adaptive controller (FARC) is proposed, and then novel loop scheme that concatenation (PIC) FARC established this paper. Firstly, due real sampling number delay element BLDC, system may not be an integer, designing process parameters was studied, internal model decomposition rule were designed based on Lagrange interpolation theory. Secondly, PIC analyzed through three-dimensional two-dimensional images characteristics. Furthermore, composite added forward channel stability Lyapunov It should noted analysis mainly focused simplified structure parameter optimization, which usually ignored previous studies. Finally, BLDC Matlab/Simulink software, performances utilizing different studied. The simulation results show proposed can reduce distortion torque ripples, thus, improved effectively.