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

Atsuo Kawamura; Satoshi Nakazaki; Shogo Ito; Sakahisa Nagai; Hidemine Obara

doi:10.1541/ieejjia.20001291

This article has now been updated. Please use the final version.

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

Atsuo Kawamura, Satoshi Nakazaki, Shogo Ito, Sakahisa Nagai, Hidemine Obara

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Keywords: inverter, high efficiency, multi-level, HEECS

JOURNAL FREE ACCESS Advance online publication

Article ID: 20001291

DOI https://doi.org/10.1541/ieejjia.20001291

The final version of this article is now available: Vol. 9 (2020), No. 6 pp. 663-673

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Abstract

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%.

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