Finite Control Set-Model Predictive Flux Control of PMSM for Air Compressor of Fuel Cell Systems

This paper presents finite control set model predictive flux control (FCS-MPFC) of permanent magnet synchronous motor (PMSM) for the air compressor, which is used to supply the compressed air for electro-chemical reaction of fuel cell systems. For the PMSM fed by 2-level VSI, the general finite control set-model predictive torque control (FCS-MPTC) needs to search all feasible voltage vectors, which will consume much time. Beyond that, the cost function of FCS-MPTC is hard to set so that FCS-MPTC is difficult to implement in practice. FCS-MPFC eliminates the setting of the cost function by predicting stator flux linkage vector. In addition, FCS-MPFC can reduce the calculation effort of searching all feasible voltage vectors to the comparison of three vectors by the deadbeat method and the equivalent transformation of discrete equations. The proposed control algorithm is carried out by simulation in transient and steady state, which is compared with FCS-MPTC. The rapid electromagnetic torque response ensures the sufficient oxygen supply for the fuel cell systems.