Shredder drive control device and method of drivingly controlling the shredder

摘要

A driving and controlling system for driving a shredding mechanism by a motor to shred paper sheets increases shredding capacity represented by the number of paper sheets that can be simultaneously shredded while limiting input current in an allowable range and reduces time necessary for shredding a predetermined number of paper sheets. The driving and controlling system comprises a motor (4) for driving a shredding mechanism (5) for shredding paper sheets (10), and a controller (1) interposed between the motor and a commercial power supply system (13) to control power to be supplied to the motor. The motor has a characteristic to reduce motor torque substantially linearly with the increase of operating speed for voltage applied thereto as a parameter. The controller controls the motor so that the operating speed of the motor decreases as the necessary torque of the shredding mechanism required for shredding paper sheets increases, and the power supplied from the commercial power supply system may not increase beyond a predetermined level.