FOLDING MOTOR CONTROL DEVICE OF A FOLDABLE SIDE MIRROR FOR PREVENTING AN ERROR OF MOTOR CONSTRAINT DECISION CAUSED BY EXTERNAL NOISE BY DETECTING ELECTRIC CURRENT AND COUNTER ELECTROMOTIVE FORCE OF A FOLDING MOTOR

摘要

PURPOSE: A folding motor control device of a foldable side mirror is provided to accurately judge the constraint of a folding motor regardless of the inflow of external noise by detecting counter electromotive force and electric current of the folding motor and accordingly to improve durability of the folding motor and driving gears by stopping quickly the constrained folding motor. CONSTITUTION: A folding motor control device of a foldable side mirror is composed of a folding motor(33) rotated according to a control signal to fold or unfold the mirror; a folding motor driving unit(32) for operating the folding motor by supplying power inserted from an outer power terminal(J1,J2) according to the control signal to the folding motor; a counter electromotive force detecting unit(34) coupled in common between the outer power terminal and a power input terminal of the folding motor driving unit to detect the counter electromotive force generated during operating the folding motor; a current detecting unit(40) coupled in parallel between the outer power terminal and the power input terminal of the folding motor driving unit to detect the current of the folding motor and earth an output terminal of the counter electromotive force detecting unit if the detected current is over a predetermined value; and a folding motor control unit(31) for operating the folding motor by the folding motor driving unit in inputting power through the outer power terminal from a folding mirror main control unit and then stopping the folding motor driving unit by judging that the motor is constrained if the counter electromotive force is not sensed from the counter electromotive force detecting unit.