Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2008-08-22
2011-11-29
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S060000, C702S064000, C702S065000, C702S126000, C363S050000, C363S055000
Reexamination Certificate
active
08069000
ABSTRACT:
An aging status diagnostic apparatus for a power conversion system and diagnosing method thereof are provided. The apparatus includes an output current sensing means detecting output current of an inverter switching module; and a measurement and diagnosis means receiving the output current, calculating one or more average values of the output current over one period, and magnitude or effective value of each harmonic of the output current, and determining whether aging of the inverter switching module has occurred. Furthermore, the measurement and diagnosis means determines that the aging of the inverter switching module has occurred if the average value of the output current over one period increases by a value equal to or greater than a predetermined range and/or an even order harmonic or a specific order harmonic based on FFT (Fast Fourier Transform) of the output current increases by a value equal to or greater than a predetermined range.
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International Search Report for PCT/KR2008/004898 , Jan. 31, 2009.
Kim Deuk Soo
Kim Rae Young
LRK Patent Law Firm
Powertron Engineering Co., Ltd.
Wachsman Hal
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