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On structural effects and energy conversion efficiency of power harvesting
SPIE Proceedings, 2008The concept of power harvesting works towards developing self-powered devices that do not require replaceable power supplies. One important parameter defining the performance of a piezoelectric power harvesting system is the efficiency of the system. However, an accepted definition of energy harvesting efficiency does not currently exist. This article
null Yabin Liao, Henry A. Sodano
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Monostable circuits with maximum power-conversion efficiency
International Journal of Electronics, 1974A monostable multivibrator using a complementary pair of transistors which needs no standing power is described. At the output terminals rectangular pulses having rise and fall times in the nanosecond range are obtained. The duration of output pulses is controlled by a diode clamp and can be made almost independent of the d.c.
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Power Gallium Nitride Technology: The Need for Efficient Power Conversion
IEEE Electrification Magazine, 2020The biggest motivation and driver for semiconductor power device innovation is improved efficiency in power conversion. Power gallium nitride (GaN) technology shows the greatest performance benefits against other incumbent technologies, including silicon (Si) technology. A reduction in power losses is the key challenge industries are facing.
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High-power conversion efficiency quantum well diode lasers
Applied Physics Letters, 1987cw power conversion efficiencies of 57% have been obtained on uncoated diode lasers emitting nearly 300 mW per facet. This performance is achieved by using a low-resistance graded index separate confinement single quantum well AlGaAs/GaAs structure with high (84%) differential quantum efficiency and low threshold current.
R. G. Waters +4 more
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Conversion efficiency Enhancement for SeriesParallel Power Conversion Systems
2021 IEEE International Future Energy Electronics Conference (IFEEC), 2021Po-Sheng Shen +2 more
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Routes to high efficiency photovoltaic power conversion
2013 IEEE 39th Photovoltaic Specialists Conference (PVSC), 2013The thermodynamic efficiency limit for solar power conversion sits at 87% yet the majority of photovoltaic devices operate at efficiencies of 20% or less. Multi-junction solar cells presently represent the most accessible technological route to high efficiency and are now operating close to the radiative limit, where optical coupling between sub-cells ...
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Efficiency of Traction Power Conversion Based on Crosswind Motion
2013This review paper is devoted to analytical modeling of the so-called kite wind generator (KWG) whose power conversion operation uses a tethered kite to mechanically drive a groundbased electric generator. An important aspect of the KWG operating principle is the controlled crosswind motion of the kite, which is used to increase the kite traction force.
Ivan Argatov, Risto Silvennoinen
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