Current Sampling Error Suppression Method for Deadbeat Predictive Direct Speed Control Based on Quasi-Resonant Controller

Surface-mounted Permanent magnet synchro-nous motors (SPMSMs) are widely used in high-precision, high-dynamic response control systems. However, the drive system's current sampling induced periodic speed fluctuation has drawn widespread attention. Therefore, this article incorporates a quasi-resonant controller (QRC) into dead-beat predictive direct speed control (DP-DSC) to suppress periodic speed fluctuations. The proposed method aims to introduce resonance points to suppress periodic speed fluc-tuations and analyze the stability of the control system and parameter tuning methods from the perspective of discrete transfer functions. The effectiveness of the proposed method has been verified through simulation.