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This paper introduces a full comparative evaluation of the advanced PV architectures especially for energy harvest application. The comparative evaluation involves module architecture, sub-module architecture, and cell architecture. The comparison includes the capability of theses PV architectures to mitigate the effect of the mismatch loss that inherently comes from different irradiation on the PV...
The paper presents a Maximum Power Point Tracking (MPPT) controller for a multi-channel (N-Channel) Photovoltaic (PV) solar system which requires only one voltage sensor and no current sensors. The N-channel Load Voltage Single-Sensor MPPT (LV-SS-MPPT) controller is able to track the MPP of each solar panel using only one output voltage value in the N-channels and is able to provide a very good tradeoff...
This paper presents the design and HSPICE simulation results of an on-chip integrated Single-OutputSensor Maximum Power Point Tracking (SOS MPPT) PV solar system architecture. The cell-level on-chip integrated analog SOS MPPT circuit is designed to track the maximum power point of PV system under different conditions including changes in irradiation levels. The MPPT circuit is implemented using 0...
This paper presents the design of an on-chip integrated power management architecture with Maximum Power Point Tracking (MPPT) for Photovoltaic (PV) solar system. The system is developed in order to extract higher power for PV system under partial shading and other mismatching conditions. The MPPT circuit is implemented in 0.35μm Complementary Metal-Oxide-Semiconductor (CMOS) technology. The on-chip...
An antenna for unmanned aerial vehicle (UAV) wireless communication requires reliable communication, small size, and light weight. Therefore, dual-polarization and dipole-like radiation characteristics are desired to avoid discontinuous communication. In this letter, we demonstrate that a planar dual-polarized Co Z hexaferrite antenna is applicable for UAV wireless communication. In order to reduce...
A Multivariable Adaptive digital Controller to optimize DC-DC converter switching frequency and dead-time at the same time, for maximum efficiency under variable conditions, is presented in this paper. The Multivariable Adaptive digital Controller (MVAC) adaptively adjusts the DC-DC converter switching frequency and dead-time while tracking the converter minimum input power (maximum efficiency) point...
This paper presents a load adaptive voltage regulator that achieves high efficiency extended to light and heavy load regions. The presented method is named as "Adaptive FET Modulation" (AFM) since multiple FETs with different specifications are paralleled such that the number of driven FETs and their respective gate driving voltage are adaptive to load current. The capability of adaptive...
A gradient power architecture concept with non-uniform current/power sharing is presented in this paper. A voltage regulator with this concept is designed, analyzed, and experimented. This scheme results in improved efficiency especially at lighter loads and the ability to control steady-state and dynamic performance especially when some of the phases are turned OFF at lighter loads
Future generation of microprocessors will require high performance Voltage Regulator Modules (VRMs) that produce tightly regulated low supply voltage with very small deviation window and able to respond very quickly to a large and continuous load transients at high output current while maintaining a high power density. On one hand, the current drawn from the VRM by the microprocessor is continuously...
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