Rotational angle detecting device

The invention discloses a rotational angle detecting device. A correction circuit 113 stores data for obtaining coefficients of a relational expression indicating a relationship between a disturbance magnetic flux and a rotational angle error. Then, the coefficients are obtained from the data for obtaining the coefficients, and a detection result of a magnetic sensor 111 is corrected based on the coefficients obtained, a relational expression, and a detection result of a disturbance magnetic flux detection circuit 112. Since it is possible to obtain the rotational angle error with respect to the disturbance magnetic flux from the coefficient obtained and the relational expression, it is not necessary to store the data indicating the relationship between the disturbance magnetic flux and the rotational angle error for all of the disturbance magnetic flux value in disturbance magnetic flux regions that may be applied. 公开了种旋转角度检测装置。校正电路113储存用于获取关系表达式的系数的数据，该关系表达式指示扰动磁通量与旋转角度误差之间的关系。然后，从用于获取系数的数据中获取系数，并且基于所获取的系数、