| 摘要 |
A paper shredder enables to control power consumption and achieve energy saving by realizing a torque characteristic of low torque at high speed or high torque at low speed keeping an output of a motor within a steady level. This circuit adopts a paper shredder structured with a driving motor for a rotary cutter having an inverted linear flow characteristic between rotation speed and torque and a control circuit composed of a detecting block for said rotation speed of the motor, a voltage control block for restricting a voltage output of the motor within a certain range in accordance with the rotation speed, and a current and voltage detecting block for monitoring a current flow of the motor.
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