Title :
A systematic controller design approach for neutral-point-clamped three-level inverters
Author :
Espinoza, Javier E. ; Espinoza, José R. ; Morán, Luis A. ; Sbarbaro, D.G.
Author_Institution :
Dept. of Electr. Eng., Univ. de Concepcion, Chile
Abstract :
This paper proposes a simple linear control technique that is able to keep zero neutral point potential in three level inverters. The technique works even under dynamic operating conditions and enables the decoupled control of the direct and in quadrature motor currents based on the relative gain array approach. This strategy allows the use of outer control loops to set the direct and in quadrature motor currents references as required, for instance, by field oriented and/or direct torque control strategies. Experimental results prove the theoretical considerations and show the simplicity of the proposed control scheme.
Keywords :
control system synthesis; electric current control; invertors; torque control; voltage control; decoupled control; direct motor currents; direct torque control; dynamic operating conditions; linear control technique; neutral-point-clamped three-level inverters; outer control loops; quadrature motor currents; relative gain array approach; systematic controller design; zero neutral point potential; Control systems; Medium voltage; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Switches; Topology; Torque control; Variable speed drives; Voltage control;
Conference_Titel :
Industrial Electronics Society, 2003. IECON '03. The 29th Annual Conference of the IEEE
Print_ISBN :
0-7803-7906-3
DOI :
10.1109/IECON.2003.1280583