| 摘要 |
A rotor (30) is provided with magnets (32N, 32S) having polarities that differ in the direction of rotation. A stator (40) is provided with a plurality of teeth sections (41) in the direction of rotation onto which coils (CU, CV, CW) are wound. Phase sensors (SU, SV, SW) face the magnets (32N, 32S), and output a crank position signal corresponding to the polarity of the rotating magnets (32N, 32S). Some of the magnets (32N, 32S) form heteropolar sections (34, 34k), which are magnetized to a polarity different from that of the magnet (32N, 32S) or are not magnetized to either polarity. The phase sensors (SU, SV, SW) are arranged on the rotation trajectory of the heteropolar sections (34, 34k), which rotate with the rotor (30). When a heteropolar section (34, 34k) has been detected, the phase sensors (SU, SV, SW) outputs a control signal indicating the absolute rotation position of an output shaft (14) of an internal combustion engine. |
