Extension of Unified Predictive Flux Control Through Harmonic Compensation for EESM, IM, PMSM and SyRM

This paper presents an extension of a unified predictive flux control algorithm for induction machines (IMs), externally excited synchronous motors (EESMs), permanent magnet synchronous motors (PMSMs), and synchronous reluctance motors (SyRMs), enabling online compensation of steady-state model errors and spatial harmonics through an integrated repetitive control scheme. Building on the generalized machine model and continuous-control-set model predictive control (MPC) framework established in previous work, a twodimensional, angle-dependent error compensation algorithm is introduced. This allows robust mitigation of harmonics originating from stator winding imperfections, rotor slotting, and inverter nonlinearities while preserving the high dynamic performance and uniformity of the baseline controller. Due to its structure, the proposed approach supports a computationally efficient implementation that remains highly robust without requiring additional data or model knowledge compared to the baseline controller. Experimental validation on a 5.9 kW EESM, a 22 kW IM, and a 169 W PMSM demonstrates almost complete suppression of dominant current harmonics and a significant reduction in Total Harmonic Distortion (THD) under steady-state operation. ... mehrThe results confirm the effectiveness of the unified compensator in handling harmonics and model deviations across diverse machine types.