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Due to low-cost and simplicity, differential drive mobile robot are very popular in academic and hobby environments. However, in some applications, such as robot soccer, these robots need to move quickly and aggressively, thus requiring the use of techniques from control systems theory, where an accurate mathematical model is paramount. On the other hand, given budget limitations, the components used...
A lifetime analysis was performed on the DC-link capacitor of a photovoltaic power-processing system composed of a boost converter in the first stage. It was investigated how the switching frequency and ripple current design choice affect the capacitor lifetime. Through an electro-thermal modeling, the capacitor operating condition was obtained for various levels of power processing, based on a real...
This paper proposes a discrete-time sliding mode current observer (DSMCO) that relies only on the measure of the voltage between a distribution static compensator (DSTATCOM) and a self-excited induction generator (SEIG). Thus, the proposed observer reduces the overall cost of the voltage regulator system, however, the current sensor's cost is significant. The proposed algorithm is also adaptive, because...
In this paper, a new small-signal model for the Class-E DC-DC converter with piezoelectric transformer is presented. The model was obtained using the generalized averaging method, through Fourier harmonics approximation. The model describes all poles and zeros of the system, being accurate for heavy and light loads. The converter was suppose to work under Zero Voltage Switching conditions, and this...
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