Abstract:
In order to reduce common mode voltage and torque ripple, a model predictive pulse pattern control (MP
3C) method was proposed for permanent magnet synchronous machine (PMSM). Firstly, the first vector was obtained by current prediction and cost function minimization; then, the corresponding pulse sequence was designed and selected by combining the first vector and the modulation degree of the inverter. Finally, the duration times of the basic voltage vectors in the candidate pulse sequence were determined based on the principle of deadbeat predictive current control. A performance comparison of traditional dual-vectors-based model predictive control (DV-MPC), triple-vectors-based MPC (TV-MPC), reduced-common-mode- voltage MPC (RCMV-MPC) and the proposed MP
3C schemes was carried out. Experimental results have verified that the proposed MP
3C scheme can effectively suppress common-mode voltage and torque ripple, and simplify the algorithm complexity.