PROBLEM TO BE SOLVED: To provide a rotation detection device, a rotation angle detection device, and an electric power steering device capable of appropriately detecting the abnormality of a functional part which detects the rotation of a rotary shaft.SOLUTION: A first arithmetic part 51 calculates a rotational direction D1 and a rotational frequency N1 of a rotary shaft 12a on the basis of a change in the combination of the positiveness/negativeness of a first electric signal S1 (first sine signal) and a third electric signal S3(first cosine signal). A second arithmetic part 52 calculates a rotational direction D2 and a rotational frequency N2 of the rotary shaft 12a on the basis of a change in the combination of the positiveness/negativeness of a second electric signal S2 (second sine signal) and a fourth electric signal S4 (second cosine signal). An abnormality determination part 53 determines the abnormality of the first and second arithmetic parts 51 and 52 on the basis of the two rotational directions D1 and D2 calculated by the first and second arithmetic parts 51 and 52.SELECTED DRAWING: Figure 1
【課題】回転軸の回転を検出する機能部分の異常を適切に検出することができる回転検出装置、回転角検出装置および電動パワーステアリング装置を提供する。【解決手段】第1の演算部51は、第1の電気信号S1(第1の正弦信号)および第3の電気信号S3(第1の余弦信号)の正負の組み合わせの変化に基づき回転軸12aの回転方向D1および回転数N1をそれぞれ演算する。第2の演算部52は、第2の電気信号S2(第2の正弦信号)および第4の電気信号S4(第2の余弦信号)の正負の組み合わせの変化に基づき回転軸12aの回転方向D2および回転数N2をそれぞれ演算する。異常判定部53は、第1および第2の演算部51,52によりそれぞれ演算される2つの回転方向D1,D2に基づき、第1および第2の演算部51,52の異常を判定する。【選択図】図1
ROTATION DETECTION DEVICE, ROTATION ANGLE DETECTION DEVICE, AND ELECTRIC POWER STEERING DEVICE
回転検出装置、回転角検出装置および電動パワーステアリング装置
2016-11-10
Patent
Electronic Resource
Japanese
IPC: | G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen |
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