Publicado

2018-04-01

Development of a high performance batteries charger with low THD, high power factor, and high efficiency

Desarrollo de un cargador de baterías de alto desempeño con bajo THD, alto factor de potencia y alta eficiencia

Palabras clave:

battery charger, DC-DC converter, electromagnetic compatibility, power factor corrector, total harmonic distortion (en)
cargador de baterías, convertidor DC-DC, compatibilidad electromagnética, corrector de factor de potencia, distorsión armónica total (es)

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This paper presents the design, simulation, and implementation of an off-board charger of medium and low capacity batteries that incorporates a power factor corrector, reaches a low THD current with the advantage of providing higher robustness against network frequency variations, and allows the implementation of three different charging strategies. On the one hand, this charger consists of a galvanic isolation stage, followed by a bridge rectifier connected to a Boost converter, which regulates the power factor and THD. On the other hand, a Buck converter cascaded with the Boost serves as a current or voltage source, depending on the operating charging strategy. Subsequently, results obtained in the testing phase are presented, placing great emphasis on obtaining a power factor of 0.978 and a THD of 5.7%, which are compared to standard IEC 61000-3-2. Finally, the efficiency of the prototype, which reaches a maximum of 91.1%, is evaluated; conclusions are therefore presented.
Este articulo presenta el diseño, simulación e implementación de un cargador off-board de baterías de mediana y baja capacidad que incorpora un corrector de factor de potencia, alcanza una baja distorsión armónica (THD) en corriente y permite la implementación de tres diferentes estrategias de carga. Este cargador está compuesto de una etapa de aislamiento galvánico, seguida por un puente rectificador el cual es conectado a un convertidor Boost quien regula el factor de potencia y el THD. Por otro lado, un convertidor Buck es conectado a la salida del convertidor Boost, actuando como una fuente de corriente o tensión, dependiendo de la estrategia de carga que se implemente. Posteriormente, se presentan los resultados haciendo énfasis en el valor de 0.978 para el factor de potencia y el de 5.7% para el THD, el cual es comparado con el estándar IEC 61000-3-2. Finalmente, se evalúa la eficiencia del prototipo encontrando un valor máximo de 91.1% y luego se presentan las conclusiones.

Citas

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