ROTATION ANGLE DETECTOR AND ROTATING ELECTRICAL MACHINE USING THE SAME

To obtain a rotation angle detector with which a decrease in the accuracy of detecting a rotation speed and a rotation angle is prevented by reducing a signal flux entering in the magnetism detection direction of a magnetism detection element and suppressing the influence of a disturbance magnetic flux.SOLUTION: The rotation angle detector comprises: a magnet which is provided at one side in the axial direction of a shaft and rotates integrally with the shaft; a magnetism detection element which is disposed at one side in the axial direction of the magnet by being spaced apart from the magnet; and a shield which is composed of a magnetic substance. The shield is disposed at a position in the axial direction between the axial position of a wiring member in which a current flows and the axial position of the magnetism detection element and includes a portion which is located on the radially outside of the magnet as seen in the axial direction and overlaps the wiring member as seen in the axial direction. The wiring member is disposed at an axial position closer to the magnet than the magnetism detection element and located on the radially outside of the magnet as seen in the axial direction.SELECTED DRAWING: Figure 2 【課題】磁気検出素子の磁気検出方向へ入射する信号磁束の減少、及び外乱磁束の影響を抑制して、回転速度及び回転角度の検出精度の低下を防止した回転角度検出装置を得ること。【解決手段】シャフトの軸方向一方側に設けられ、シャフトと一体回転する磁石と、磁石の軸方向一方側に、磁石とは間隔を空けて配置された磁気検出素子と、磁性体からなるシールドとを備え、シールドは、電流が流れる配線部材の軸方向の位置と、磁気検出素子の軸方向の位置との間の軸方向の位置に配置され、軸方向に見て磁石の径方向外側に配置され、軸方向に見て配線部材と重複した部分を有し、配線部材は、磁気検出素子よりも磁石の側の軸方向の位置に配置され、軸方向に見て磁石の径方向外側に配置されている。【選択図】図２