Nonlinear robust control of a vector-controlled synchronous reluctance machine

This paper presents the implementation of Slotine's approach of sliding mod e control for position control of a vector-controlled synchronous reluctanc e machine. A comparison is undertaken between the performance of a fixed ga in controller and two sliding mode controllers for both the regulator and s ervo cases. Invariant performance is obtained using Slotine's approach of s liding mode control compared to a fixed gain controller. Robustness to para meter variation is an important feature of this technique. This can be achi eved through the control law design, assuming parameter variation bounds ar e known. These improvements are demonstrated for variations in the load ine rtia. Machine inductance ripple affects the quality of achievable position control. A state-space model for the machine to incorporate this effect yie lds drive simulation results that agree with presented experimental results .