| 摘要 |
A smoke exhaust window driving system is provided to open a smoke exhaust window smoothly with variable current by operating a chain wound on a driving box with a motor for opening a smoke exhaust window connected with the chain, and controlling voltage and current supplied to the motor and generating large force during initial operation, to close a smoke exhaust window tightly by compressing a packing with large force by variable current while closing, and to reduce the distortion and malfunction of a window by controlling the rotational frequency of upper and lower motors and distributing the opening and closing forces of a smoke exhaust window evenly when installing two driving boxes to the upper and lower parts. A smoke exhaust window driving system includes a power supply unit supplying power required for operating a motor and a control unit, and a variable voltage/current control unit controlling the power of the power supply unit in the regulator resistance method by stages if an opening signal or a closing signal of a signal input unit is inputted and controlling voltage and current to make the initial opening force and closing force of the smoke exhaust window than while opening or closing. The variable voltage/current control unit increases or decrease the current supplied to the motor linearly by controlling current in three stages during initial opening or operating of a closing switch to generate large force with low speed rotation of the motor. |
