第四届中国电力电子与能量转换大会暨展览会、中国电源学会第二十八届学术年会

讲座主题：How to measure 99.9% efficiency with a high accuracy
讲座人：Atsuo Kawamura，Professor emeritus, Yokohama National University
讲座摘要：
The advent of wide bandgap semiconductor devices has made it possible to achieve high conversion efficiency in power conversion. DC-AC power conversion (inverters) has AC output and varying input-output voltage ratios, making it difficult to achieve ultra-high efficiency. The speaker's research group is aiming to create a HEECS inverter with 99.9% efficiency. As efficiency increases, it becomes important to ensure measurement accuracy. The speaker proposed a loss measurement method using only electrical measuring instruments called the VTASLM method, which achieved a measurement accuracy of 0.004% and measured a conversion efficiency of 99.84%. Its characteristic lies in combining active and regenerative operations to improve loss measurement accuracy. This measurement method will be explained in detail.
First, the theoretical analysis of efficiency measurement, the theory of VTASLM, measurement errors in power and regeneration operations, the theory of deriving average losses and their errors in VTASLA, practical error correction, and measurement procedures will be explained.
Next, using the HEECS inverter as an example, the actual measurement of correction terms and the calculation of measurement accuracy will be explained based on actual measurement data.
Finally, as a discussion, we will consider methods to further improve measurement accuracy, as well as average efficiency and operating points.
This loss measurement method is versatile and can be used to measure losses with high accuracy in any electrical equipment using existing power measurement devices.
（reference: A. Kawamura, https://doi.org/10.1541/ieejjia.21008251)
作者简介：
Atsuo Kawamura (IEEE Life Fellow) received the Ph.D. degree in electrical engineering from the University of Tokyo in 1981. After the five-year-stay at the University of Missouri-Columbia as a faculty member, he joined the department of electrical and computer engineering at Yokohama National University in 1986. After he retired there as a professor emeritus in 2019, he was a professor of power electronics endowed chair till 2023. Now he is adjunct investigator at YNU.
His interests are in the fields of power electronics, digital control, electric vehicles, train traction control and robotics.
He received several Transactions Paper Awards from IEEE and IEE of Japan, including 2008 EPE-PEMC Award and 2025 IEEE William E. Newell Power Electronics Award.

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( ~~2025年6月30日~~ 2025年7月21日 )
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( ~~2025年7月15日~~ 2025年7月30日 )
专题讲座征集截止时间

( ~~2025年7月15日~~ 2025年7月30日 )
论文录用通知时间

( 2025年8月15日 )
论文终稿提交时间

( 2025年9月15日 )
报名系统开放时间

( 2025年8月16日 )
大会时间

( 2025年11月7-10日 )
展览时间

( 2025年11月8日-9日 )