IJCAS

In a high-speed operation, the iron loss of motor cannot be neglected since it may not be small enough. The existence of iron loss will lead to unknown nonlinearities and model uncertainties. Additionally, the existence of output delay in the system will bring speed fluctuation, which may degrade the control efficiency and even cause system instability. Hence, with the aid of continuous form characteristic model, this article provides the adaptive controller to address the control problem for high-speed permanent magnet synchronous motor (HSPMSM) system subject to time delay and plant uncertainties, simultaneously. Specifically, by employing characteristic model is more conducive to the design of controller, that is, the characteristic model only includes the input and output of the system, and the current is not required for parameter estimation. In addition, the proposed controller can deal with time delay, parametric uncertainties and uncertain nonlinearities at the same time. Furthermore, the numerical simulation results demonstrate the effectiveness and robustness of the proposed control strategy.

Keywords: Adaptive control, characteristic model, high-speed permanent magnet synchronous motor (HSPMSM), iron loss, parametric uncertainties, time delay.