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Full-Text Articles in Engineering
Design, Fabrication, And Testing Of A High-Speed, Low-Cost Atomic Force Microscope Housing And Distance Measurement System, Jonathan Menke
Design, Fabrication, And Testing Of A High-Speed, Low-Cost Atomic Force Microscope Housing And Distance Measurement System, Jonathan Menke
All Undergraduate Theses and Capstone Projects
Advances to the state-of-the-art in fields like biology and material science often stand on the foundation of improved imaging. Here a low-cost Atomic Force Microscope (AFM) housing and distance measurement system was designed, fabricated, and tested. The instrument was developed around an Optical Pickup Unit (OPU) and designed for use as part of a high-speed AFM system. A structure to align the OPU with the probe holder was designed to ensure the beam of the OPU is positioned above the probe in addition to accommodating space, manufacturability, and cost constraints by using cost effective components. The designs were fabricated and …
Analysis Of Three-Phase Rectifier Via Three Different Control Methods And Switch Power Loss Comparison, Yichao Wang
Analysis Of Three-Phase Rectifier Via Three Different Control Methods And Switch Power Loss Comparison, Yichao Wang
All Graduate Theses, Dissertations, and Other Capstone Projects
Traditional uncontrolled or phase-controlled rectifiers have the defects of lower power factor and nontrivial higher harmonics which causes the low efficiency of power, bad power quality, and so on. However, PWM rectifiers overcome the drawbacks mentioned above. They reduce the higher harmonics yielding better sinusoidal current on the grid side, achieve unity power factor and bidirectional power flow, and have better dynamic performance. So, it is favored more by academia and widely applied in high-performance power electronics devices. In this paper, the PWM rectifier is analyzed and a comparison of the switch loss on three-phase rectifier using three different control …
Implementation Of Model-Free Adaptive Power Flow Control For Dual-Active-Bridge-Based Ac-Dc Converters, Qinghang Shen
Implementation Of Model-Free Adaptive Power Flow Control For Dual-Active-Bridge-Based Ac-Dc Converters, Qinghang Shen
All Graduate Theses, Dissertations, and Other Capstone Projects
With the rising energy consumption and environment destruction problems worldwide, the development of renewable energy and energy recapture methods to improve the energy utilization rate has become more important as two of the most efficient processes to solve those problems. Bidirectional AC/DC converter and its modulation strategies are widely used as the essential part of implementing bidirectional power conversion between power grid and energy storage systems. To improve the efficiency and accuracy of the power conversion within AC/DC converters, a stable, robust power flow control system with quick response and disturbance rejection ability is desired. This thesis proposes a model-free …