スイッチング変調技術による三相零相出力成分の生成と活線絶縁診断システムヘの適用

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  • Generation of Three-phase Zero-phase-Sequence Output Components by the Switching Modulation Technique and its Application to Hot-line Insulation Diagnosis System
  • スイッチング変調技術による三相零相出力成分の生成と活線絶縁診断システムへの適用
  • スイッチング ヘンチョウ ギジュツ ニ ヨル 3ソウ レイソウ シュツリョク セイブン ノ セイセイ ト カッセン ゼツエン シンダン システム エ ノ テキヨウ

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This paper deals with a power supply using switching modulation technique, and its application to the hot-line insulation diagnosis. One of the distinct features of the switching modulation techinque employed in this study is that the zero-phase-sequence voltage with arbitary frequency is generated easily in the three-phase power system. Basic composition is just to add a switching modulation device to the commercial power supply or charged indoor main line. Therefore, it is not necessary to feed a signal current from the signal power supply to the grounding conductor via a pouring transformer as required by current hot-line insulation diagnosis system. <BR>When a power supply using switching modulation technique is used to hot-line insulation diagnosis, it is not necessary to modify or change existing commercial power facility. Therefore, there is a possibility that this may advantageously be used as a power supply for mobile type diagnosis. This paper deals with basic theory of switching modulation technique, and the phase rotation characteristics which play a basic role in three-phase power supply, and summarizes basic composition and performances of a trial manufactured experimental device. Furthermore, results of discussion are introduced concerning the conditions and method of its apllication to indoor wiring of fatories and buildings.

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