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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2014

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A state-space approach for control of NPC type 3-level sine wave inverter used in FOC PMSM drive

Tarczewski T., Grzesiak L. M., Wawrzak A., Karwowski K., Erwiński K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2014

Vol. 62, nr 3

439--448

This paper presents the design and analysis process of state feedback controllers for NPC type 3-level sine wave inverter. In order to achieve good dynamic features in a state feedback control an internal model of reference input and a feedforward path are introduced. During synthesis process of the state feedback controllers maximum permissible dynamics of voltage control in the linear range of modulation is taken into account. It is shown that initially gains of the controller and feedforward path are non-stationary and depend on the angular velocity. Stationary approximation of a non-stationary state feedback controller is presented in details. Proposed state feedback control structures for continuous voltage shaping NPC type 3-level voltage source inverter are examined in FOC PMSM drive. The novelty of the presented controller lays in a stationary approximated state feedback control structure designed in terms of maximum permissible dynamics of a voltage control system. Simulation and experimental results (at the level of 3 kW) of the designed control algorithms are included.