| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotation angle detector, having the high detection accuracy, simplifying a constitution, saving power and continuously detecting an absolute angle to be detected absolute. <P>SOLUTION: An ECU 11 (a microcomputer 21) detects a steering angle θs as the absolute angle, based on a sine signal S_sin and a cosine signal S_cos output from a steering sensor. The ECU 11 is provided with a three-phase pulse generator 30 for generating three-phase pulse signals P1, P2, P3 set to have edges, corresponding to predetermined rotation angles (electric angles) which correspond to the edges, and are prevented from overlapping, and evenly spaced based on the sine signal S_sin and the cosine signal S_cos. The microcomputer 21 is provided with a function as a second rotation angle detecting means for calculating a steering angle (a second steering angle θs') based on the pulse signals P1, P2, P3. <P>COPYRIGHT: (C)2011,JPO&INPIT |
