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Full-Text Articles in Engineering
Lawn Buddy, Jayson Johnston, Andrew Brown, Jacob Maljian
Lawn Buddy, Jayson Johnston, Andrew Brown, Jacob Maljian
Electrical Engineering
Grass lawns are a common hallmark of the American home. In 2019, a survey from the National Association of Landscape Professionals found that 81% of all Americans owned a lawn [1]. Mowing is a time consuming and costly chore that is part of maintaining a grass lawn. The manual labor in mowing a lawn can exceed 40 hours per year [2]. People commonly incur weekly costs on mowing services to save time. Traditional gas powered mowers are physically demanding and use engines that need routine maintenance. They operate loudly enough that users should be wearing hearing protection and the noise …
Study Of A Symmetrical Llc Dual-Active Bridge Resonant Converter Topology For Battery Storage Systems, John K. George
Study Of A Symmetrical Llc Dual-Active Bridge Resonant Converter Topology For Battery Storage Systems, John K. George
Graduate Theses and Dissertations
A symmetrical LLC resonant converter topology with a fixed-frequency quasi-triple phase-shift modulation method is proposed for battery-powered electric traction systems with extensions to other battery storage systems. Operation of the converter with these methods yields two unique transfer characteristics and is dependent on the switching frequency. The converter exhibits several desirable features: 1) load-independent buck-boost voltage conversion when operated at the low-impedance resonant frequency, allowing for dc-link voltage regulation, zero-voltage switching across a wide load range, and intrinsic load transient resilience; 2) power flow control when operated outside the low-impedance resonance for integrated battery charging; 3) and simple operational mode …
Desarrollo De Un Controlador Para Un Motor Asíncrono Con Aplicación En Automóviles Eléctricos De Tracción De Carga En Entornos Semiestructurados, Daniel Esteban Cruz López, Juan José Gómez Fierro
Desarrollo De Un Controlador Para Un Motor Asíncrono Con Aplicación En Automóviles Eléctricos De Tracción De Carga En Entornos Semiestructurados, Daniel Esteban Cruz López, Juan José Gómez Fierro
Ingeniería Eléctrica
Como alternativa para el problema de transporte y tracción de carga surgen los vehículos eléctricos. Estos requieren de controles particulares, específicamente diseñados para su aplicación. En este sentido se plantean las características de diseño de controladores que, según el tipo de motor, deben garantizar el funcionamiento a partir de parámetros dependientes de la máquina de inducción y su entorno. Se plantea el diseño de un controlador para un motor de inducción asíncrono, adaptable a un vehículo eléctrico que desempeñe sus funciones en un entorno semiestructurado, determinado por las características del sector rural colombiano. Por esta razón, se aborda el proyecto …