| 摘要 |
PROBLEM TO BE SOLVED: To obtain correct position data for a window glass with correct number of revolutions of a motor obtained, and to obtain precise data for the number of revolutions even with a revolution detecting sensor having a small number of poles used. SOLUTION: A control unit 20 that is equipped with a microcomputer CPU wherewith operation of a window glass 60 is controlled with the revolution speed of an armature shaft 6c of a motor 6 detected, based on a duration between the edge of a pulse signal generated by a revolution detecting sensor 7 and the edge of a pulse signal generated by the revolution detecting sensor 7 after a rotative body turns by one revolution, is provided. |
