PROBLEM TO BE SOLVED: To provide a current sensor abnormality diagnosis apparatus that improves abnormality detection performance of a current sensor for detecting current varying periodically.SOLUTION: A current sensor abnormality diagnosis apparatus includes: a peak output extraction unit for extracting peak output Ip1, Ip2 that is at least either a maximum value or minimum value of output Is1, Is2 of two current sensors in a period equal to or longer than one period of electricity of AC current; and an abnormality determination unit for performing abnormality diagnosis on a plurality of current sensors on the basis of a peak output deviation ΔIp, a deviation between corresponding peak output Ip1, Ip2 of the plurality of current sensors. The peak output Ip1, Ip2 is sensor output at timing at which a characteristic difference between a power sensor whose gain characteristic is abnormal and a normal power sensor is shown remarkably. Therefore, the abnormality diagnosis performed on the basis of the peak output deviation ΔIp makes it possible to securely detect abnormality of a current sensor without performing averaging processing or the like, improving abnormality detection performance.SELECTED DRAWING: Figure 3
【課題】周期的に変動する電流を検出する電流センサの異常検出性能を向上させる電流センサ異常診断装置を提供する。【解決手段】電流センサ異常診断装置のピーク出力抽出部は、交流電流の電気一周期以上の期間における二つの電流センサの出力Is1、Is2の最大値又は最小値の少なくとも一方であるピーク出力Ip1、Ip2を抽出する。異常判定部は、複数の電流センサの対応するピーク出力Ip1、Ip2同士の偏差であるピーク出力偏差ΔIpに基づき、複数の電流センサの異常診断を実施する。ピーク出力Ip1、Ip2は、ゲイン特性が異常な電力センサと正常な電力センサとの特性差が顕著に現れるタイミングでのセンサ出力である。したがって、ピーク出力偏差ΔIpに基づいて異常診断を実施することにより、平均化処理等を実施することなく、電流センサの異常を確実に検出することができ、異常検出性能が向上する。【選択図】図3
CURRENT SENSOR ABNORMALITY DIAGNOSIS APPARATUS
電流センサ異常診断装置
2017-01-26
Patent
Electronic Resource
Japanese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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