Disclosed is a device for detecting an angle of rotation, in which a first angle of rotation calculation section (21) calculates a first angle of rotation (?1) corresponding to the angle of rotation of a rotor (1), in accordance with an output signal (V1) of a first magnetic sensor (11) and an output signal (V2) of a second magnetic sensor (12). A second angle of rotation calculation section (22)calculates a second angle of rotation (?2)corresponding to the angle of rotation of the rotor (1), in accordance with the output signal (V2) of the second magnetic sensor (12) and an output signal (V3)of a third magnetic sensor (13). An angle of rotation selection section (23) obtains the final angle of rotation (?) using the first angle of rotation (?1) and the second angle of rotation (?2).

本发明提供一种旋转角检测装置。第1旋转角运算部(21)基于第1磁传感器(11)的输出信号(V1)和第2磁传感器(12)的输出信号(V2)，计算相当于转子(1)的旋转角的第1旋转角(θ₁)。第2旋转角运算部(22)基于第2磁传感器(12)的输出信号(V2)和第3磁传感器(13)的输出信号(V3)，计算相当于转子(1)的旋转角的第2旋转角(θ₂)。旋转角选择部(23)利用第1旋转角(θ₁)和第2旋转角(θ₂)来求出最终的旋转角(θ)。