Nonlinear Control of Interior PMSM Using Control Lyapunov Functions

Abstract

In this paper, we introduce a non-linear torque control for an interior permanent-magnet synchronous motor (IPMSM). The nonlinear control is based on a Control Lyapunov Function (CLF) technique. The proposed stabilizing feedback law for the IPMSM drive is a damping control method and is shown to be globally asymptotically stable. The CLF method takes the system nonlinearities into account in the control system design stage. Such nonlinearities are due to the cross coupling between the q and the q currents in addition to the system parameters like the inductances and the flux linkages. The complete IPMSM drive incorporating the proposed CLF has been successfully simulated in a plant model for both motor and inverter. The performance of the proposed drive is investigated in simulation at different operating conditions. It is found that the proposed control technique provides a good torque control performance for the IPMSM drive ensuring the global stability. In later work, we are planning to investigate other phenomena such as magnetic saturation, nonlinear loads, mechanical friction and flexibilities.

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Sabra, M. , Khasawneh, B. and Zohdy, M. (2014) Nonlinear Control of Interior PMSM Using Control Lyapunov Functions. Journal of Power and Energy Engineering, 2, 17-26. doi: 10.4236/jpee.2014.21003.

Conflicts of Interest

The authors declare no conflicts of interest.

References

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