TITLE:
Nonlinear Control of Interior PMSM Using Control Lyapunov Functions
AUTHORS:
Maha Sabra, Bashar Khasawneh, Mohamed A. Zohdy
KEYWORDS:
Nonlinear Control; Interior Permanent Magnet Motor (IPMSM); Control Lyapunov Function (CLF); IPMSM Experimental Parameter Determination
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.1,
January
17,
2014
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.