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We report the discovery of a cold Super-Earth planet (mp=4.4±0.5 M⊕) orbiting a low-mass (M=0.23±0.03 M⊙) M dwarf at projected separation a⊥=1.18±0.10 a.u., i.e., about 1.9 times the distance the snow line. The system is quite nearby for a microlensing planet, DL=0.86±0.09 kpc. Indeed, it was the large lens-source relative parallax πrel=1.0 mas (combined with the low mass M) that gave rise to the...
This paper presents an optimized single phase DC-AC converter with RCD snubber circuit. The proposed converter has an optimized number of levels per number of switches (nL/nS) which is by far the best relationship among the converters proposed in literature. The most important characteristics of the proposed configuration are: (i) reduced number of semiconductor devices, while keeping a high number...
This paper presents a three-phase DC-AC converter with an optimized number of levels per number of switches. Each phase of the proposed converter includes four controlled power switches and it is able to generate five levels. The most significant characteristics of the proposed converter are: (i) reduced number of semiconductor devices, while keeping a high number of levels at the output side of each...
This paper proposes an energy conversion unit constituted by a single-phase DC-AC converter. The proposed converter has an optimized relationship between the number of levels per number of switches (nL/nS). The proposed five-level four-switch converter has nL/nS=5/4, which is by far the best relationship among the converters proposed in the technical literature. The most important characteristics...
This paper presents a fault tolerant converter designed for low power applications, as required in a micro-grid environment. The main advantages of this converter when compared with solutions presented in the technical literature are: 1) higher number of levels using the same amount of controlled switching devices (six IGBTs), b) no dead-time requirement for the converter's operation, which is an...
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