To realize a new method for monitoring a state of a rotational electric machine.SOLUTION: If a rotational electric machine is used as a main electric motor 20, a ground current leakage of the main electric motor 20 is detected on the basis of a detected current obtained by a current sensor 22 provided in a main circuit cable between the inverter 18 and the main electric motor 20. After that, a frequency analysis is performed on the detected current leakage. On the basis of the result of the frequency analysis, an abnormality in the main electric motor 20 is determined.SELECTED DRAWING: Figure 1
【課題】回転電気機械に対する状態監視の新たな手法を実現すること。【解決手段】例えば、回転電気機械を主電動機20とするならば、インバータ18と主電動機20との間の主回路ケーブルに設けた電流センサ22による検出電流に基づいて主電動機20の対地漏洩電流を検出する。そして、検出した対地漏洩電流に対する周波数分析を行う。その周波数分析結果に基づいて、主電動機20の異常を判定する。【選択図】図1
DEVICE AND METHOD FOR DIAGNOSING STATE
状態診断装置及び状態診断方法
2020-01-16
Patent
Electronic Resource
Japanese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
DIAGNOSING DEVICE, DIAGNOSING SYSTEM, DIAGNOSING METHOD AND PROGRAM
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