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Two-Battery HEECS Inverter with over 99.7% Efficiency at 2.2kW Output and Measurement Accuracy Based on Loss Breakdown

  • Kawamura Atsuo
    Department of Electrical and Computer Engineering, Yokohama National University
  • Nakazaki Satoshi
    Department of Electrical and Computer Engineering, Yokohama National University
  • Ito Shogo
    Department of Electrical and Computer Engineering, Yokohama National University
  • Nagai Sakahisa
    Graduate School of Frontier Science, The University of Tokyo
  • Obara Hidemine
    Department of Electrical and Computer Engineering, Yokohama National University

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Abstract

<p>A DC-AC conversion efficiency of over 99.7% is experimentally measured using a two battery high efficiency energy conversion system (HEECS) inverter. The accuracy of the efficiency measurement is evaluated by two methods: the direct measurement method and the loss breakdown method. After several measurements, calculations and analyses it is concluded that the measurement error based on the loss breakdown method is 0.04%.</p>

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