| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost of the drive controller of a power window system and make it operable, when its feeding voltage is lowered. SOLUTION: A drive controller of a power window system has such a pinch- sensing circuit 5 that, by monitoring the current value of a motor 2 for driving the opening/closing of a window, the circuit 5 detects pinching when the necessary rising time of the current value of the motor 2 for the rising thereof exceeds a preset time when the window is driven in its closing direction. By an inverse switching circuit 4, the driving direction of the motor 2 is inverted, if the pinch sensing circuit 5 senses pinching. |
