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In this paper, the design procedure of an electric vehicle (EV) wireless charger is presented. Unlike most of the systems available in the literature, the proposed charging system is regulated from the vehicle side. The on-board electrical circuit automatically adapts the resonant compensation to guarantee compatibility with the primary inverter characteristics and achieve high transmission efficiency without communication between sides. Moreover, the proposed control strategy, used to regulate the secondary full active rectifier (FAR), allows the supply of the the EV battery, maximizing the efficiency during the whole charging process.

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Abiotrophia defectiva,  previamente conocida como variante nutricional  de estreptococos forma parte de la microbiota normal de la cavidad oral, urogenital y tracto gastrointestinal. Se asocia con infecciones severas como bacteriemia, endocarditis, abscesos cerebrales, osteomielitis, artritis séptica y queratopatía del cristalino. Es un microorganismo difícil de diagnosticar y las tasas de morbimortalidad, son altas.Se presenta el caso de  un paciente adulto joven con coartación aórtica, con antecedentes de miocardio no compacto y comunicación ventricular pequeña, que consulta por cuadro de 16 días de evolución, caracterizado por dolor en la región glútea y fiebre.Se solicitan tres muestras de hemocultivos que se procesaron por método automatizado BACTEC (Phoenix). Las tres muestras de hemocultivos resultaron positivas a las 48 h para cocobacilos grampositivos en cadena. La identificación del aislamiento se realizó con autoanalizador BD PhoenixTM  System dando como resultado Abiotrophia/Granulicatella, confirmándose por espectrometría de masas (MALDI-TOF) como Abiotrophia defectiva.Se realizó  tratamiento antibiótico  inicial con ampicilina, gentamicina y vancomicina por 7 días, continuando con ceftriaxona más gentamicina durante 22 días, evolucionando  favorablemente.Debido a este hallazgo es importante alertar a los infectólogos y microbiólogos, considerar a Abiotrophia defectiva como posible agente causal  de endocarditis.

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The present work shows a comprehensive methodology and design steps to recover energy from the automotive waste heat. A thermoelectric generator must be connected to a power converter in order to extract the maximum power from the generator and, also, satisfy different constrains to charge a battery. Starting from the electrical model of thermoelectric cells, it is evaluated their combination to realize a thermoelectric generator (TEG) comply with the automotive regulation, then considering input/output electric characteristics, it is evaluated the best converter topology to satisfy all constrains. Design steps and power dissipation estimation are deeply explained. TEG and power converter models are simulated in a model-based environment to allow the design of the control algorithms. The control system consists of nested control loops. Two maximum power point tracking (MPPT) algorithms are evaluated. The MPPT output is used as reference for a current control loop. The maximum power characteristic of a TEG has a quadratic behavior and working without the tracking of the maximum power point could drastically decrease the generated power from the TEG and the system efficiency. There are presented simulation results of the control algorithms and experimental data are shown in order to validate the design steps.