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POWER CONVERSION DEVICE, DIAGNOSIS SYSTEM OF POWER CONVERSION DEVICE, AND DIAGNOSIS SERVICE OF POWER CONVERSION DEVICE
POWER CONVERSION DEVICE, DIAGNOSIS SYSTEM OF POWER CONVERSION DEVICE, AND DIAGNOSIS SERVICE OF POWER CONVERSION DEVICE
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机译:功率转换装置,功率转换装置诊断系统以及功率转换装置的诊断服务
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摘要
PROBLEM TO BE SOLVED: To minimize the stopping of a power converter owing to a failure thereof by a technique for diagnosis of a power conversion device.;SOLUTION: A power conversion device comprises: voltage change extraction parts 14 and 21 operable to accept the input of an output voltage waveform based on a voltage between terminals of a semiconductor module 1 and a voltage signal resulting from the detection of a current flowing through the terminals of the semiconductor module by a current sensor 26, and to determine an output voltage waveform and a voltage signal as results of the extension of the output voltage waveform and voltage signal based on a filter constant while retaining amplitude values of the output voltage waveform and voltage signal in a transition region; voltage change extraction parts 15 and 22 operable to determine an output voltage waveform and a voltage signal which have a conducting state-holding time and amplitude values of the output voltage waveform and voltage signal in a steady region as a region other than the transition region; AD converters 17 and 24 operable to perform digital conversion when accepting the input of the output voltage waveform and the voltage signal; and a digital signal processing circuit 18 operable to diagnose the operation of the semiconductor module based on the output voltage waveform and voltage signal subjected to the digital conversion.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT
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