Dual nonlinear ESO-based model-free predictive current control for dual three-phase PMSM with bus-clamping PWM

Abstract

This paper proposes a dual nonlinear extended state observer (NESO)-based model-free predictive current control (MFPCC) scheme integrated with bus-clamping pulse width modulation (BCPWM) for dual three-phase permanent magnet synchronous machine (DTP-PMSM) to address the parameter sensitivity and harmonic suppression challenges. Dual NESOs are designed to estimate lumped disturbances and enhance system disturbance rejection capability. A BCPWM strategy is presented and synergistically embedded within the MFPCC framework to reduce switching losses while preserving harmonic mitigation performance. In addition, the deadbeat control and three-phase decoupling approach are developed and integrated into the proposed MFPCC to enable computationally efficient optimization of voltage vector selection and duty cycle allocation. Extensive comparative studies verify the robustness and superior steady-state performance of the proposed dual-NESO-based MFPCC with the BCPWM scheme.