Decoupling Control of Permanent Magnet Synchronous Motor Based on Inverse System Theory

A decoupling control approach based on inverse system method had been applied for the permanent magnet synchronous motor(PMSM),which was multi-variable,nonlinear and coupled system.PMSM was decoupled into second-order linear speed subsystem and first-order linear flux subsystem.The servo robust controller was used to design linear closed-loop controller for the pseudo-linear subsystems.Simulation results showed that this kind of control strategy could realize dynamic decoupling control between speed and flux of PMSM,and the control system had fine dynamic and static performance.