| 摘要 |
PURPOSE:To prevent mis-operation due to secular change of window member, adhesion of foreign matter, noise, etc., and also reduce the number of sensors for detecting fully closed position, etc., CONSTITUTION:An estimated present position of a window is obtained by a control part 22 based on a ripple count value of a motor 24 by a ripple detector part 27, an estimated current value in a current pattern during the preceding closing operation corresponding to the estimated present position is obtained, an upper and lower current limit values are calculated based on the estimated value by the control part 22, the present value of motor current is compared with the upper and lower current limit values, respectively and, when the present value is larger than the upper current limit value, a reverse instruction is output and, when it is smaller than the lower current limit value, a stop instruction is output. Thus mis-operation due to secular change of window member, adhesion of foreign matter, noise, etc., can be prevented and also the number of sensors for detecting fully closed position, etc. can be reduced. |
