Achieving high efficiency in a double conversion transformerless UPS

@article{Tracy2005AchievingHE,
  title={Achieving high efficiency in a double conversion transformerless UPS},
  author={J. G. Tracy and H.-E. Pfitzer},
  journal={31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005.},
  year={2005},
  pages={4 pp.-}
}
This paper describes the design of a transformerless UPS that uses two high frequency PWM power converters in series without sacrificing efficiency compared to their transformed forerunners. It has long been accepted, however, that a high frequency PWM converter will have higher losses than a diode rectifier or SCR phase control rectifier and that the loss in efficiency is simply one way to bare the cost for the increased performance. The advantages of using a high frequency PWM converter for… CONTINUE READING
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