Abstract
In this paper, identification of sensitive variables is attempted for second-order (flat/partially flat) and fourth-order partially flat converters with dynamic loads. The sensitivity nature of each state variable to the output speed variable of the DC motor for the above-mentioned systems was analyzed via the frequency domain technique. Further, in continuation of this, we aimed to confirm that the variables that are used in the control law exact tracking error dynamics, passive output feedback control (ETEDPOF) are sensitive. To verify the sensitivity property, an experimental case study was done using ETEDPOF and compared with the proportional-integral controller (PIC) for a flat system, and the results are presented.
Highlights
Stable trajectory tracing is essential in power converter applications such as power quality and drives, etc
The main objective of the present work is to regulate the speed of a DC motor for a given desired speed profile (ω∗ ) under no-load and load conditions
In a buck converter with a dynamic load, the inductor current is considered as the sensitive variable; In order to verify the sensitivity nature, ETEDPOF is compared with proportional-integral controller (PIC) in the above-mentioned system
Summary
Stable trajectory tracing is essential in power converter applications such as power quality and drives, etc. DC-to-DC power converters are used to achieve the required voltage for a DC drive based on demanded trajectory profiles. Based on the restrictions of a ramp’s magnitude and constant values which act as a reference profile, conventional feedback controllers cannot perform better. In order to alleviate this problem, trajectory tracing control of rest-to-rest maneuvers becomes mandatory. The passivity based controller (PBC) for power converters is designed to trace the required voltage/current effectively. The passivity theory was initially proposed in circuit analysis
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