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access icon free Adaptive closed-loop state control system for a three-level neutral-point-clamped Z-source inverter

© The Institution of Engineering and Technology
Received 06/03/2015, Accepted 07/10/2015, Revised 22/09/2015, Published 01/03/2016

Z-source inverter (ZSI) combines the electrical function of a DC/DC converter and a three-phase inverter. This study deals with a three-level neutral-point-clamped (NPC) ZSI which brings an additional electrical potential. The benefit is the lower output current ripple of each phase. Due to the non-linear behaviour of the Z-source control path, designing an accurate and especially a dynamic control can be challenging. This study presents a design of an adaptive control for a three-level NPC ZSI to fulfil the previously mentioned goals. The correct functionality of the control system is underlined with measurements at different operating points. A possible application field for three-level ZSIs are hybrid and electric vehicles.

Inspec keywords: DC-DC power convertors; closed loop systems; invertors; adaptive control; hybrid electric vehicles

Other keywords: hybrid electric vehicle; DC-DC converter; dynamic control; three-level neutral-point-clamped Z-source inverter; adaptive closed-loop state control system; NPC ZSI

Subjects: Self-adjusting control systems; DC-DC power convertors; Control of electric power systems; DC-AC power convertors (invertors)

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