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ENERGY EFFICIENCY IMPROVEMENT FOR WIRELESS POWER TRANSFER / CHARGING
Nelms Institute Contact: Shuo Wang
Wireless power transfer can give people more freedom to move. The energy transfer efficiency can help reduce the charging/transfer time. EM field from both the transmitter coil and receiver coil leads to eddy current power loss. Furthermore, due to the unmatched charging load, the wireless power transfer cannot achieve the high power transfer. Exploring the power loss due to the eddy current power loss and optimize the transmitter and receiver coil design can improve energy conversion efficiency. Developing optimal load matching systems can maximize the transferred power and reduce the transfer / charging time.
POWER GRID HARMONIC REDUCTION FOR CASCADED MULTILEVEL POWER INVERTERS
Nelms Institute Contact: Shuo Wang
Grid-tied power inverters generate harmonics to the power grid which reduces the power quality. Reducing the harmonics generated by the power inverters with an optimal modulation control scheme, optimal component parameter design, and novel harmonic reduction algorithm can significantly improve the power inverter’s compatibility and power grid’s power quality.
RADIATED EMI REDUCTION AND TRANSFORMER DESIGN FOR ACF POWER ADAPTERS TO REDUCE COST AND SIZE
Nelms Institute Contact: Shuo Wang
Flyback converter topology has been a popular topology for the AC/DC power adapters of portable electronics such as smartphones, tablets and Chromebooks because it is low cost and requires small number of components. The Flyback transformer should be investigated to reduce EMI, increase energy efficiency and reduce leakage inductance, with a focus on the winding optimization to improve both energy efficiency, reduce conductive & radiated EMI and reduce leakage inductance for parasitic ring reduction.