A Dual Internal Mode Decoupling Control Strategy for Permanent Magnet Synchronous Motor Drives Fed by the Current Source Inverter

This article proposes a dual internal model decoupling control strategy to solve the high order and strong coupling problem of the permanent magnet synchronous motor (PMSM) system fed by the current source inverter (CSI). In order to analyze the effect of coupling terms on the system, the mathematical model of the PMSM fed by the CSI is derived. On this basis, the dual internal model decoupling control strategy is proposed, and the design method of the current loop controller and the voltage loop controller are introduced respectively. The problems of high order and strong coupling on the system are effectively resolved by this strategy, and the stability of the system is analyzed. At last, the results show that the harmonic content of the system is reduced and the dynamic decoupling performance is improved.