发明名称 |
A MOTOR CONTROL CIRCUIT FOR PAPER SHREDDERS |
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 said motor, a voltage control block for restricting a voltage output of said motor within a certain range in accordance with said rotation speed, and a current and voltage detecting block for monitoring a current flow of said motor. While a voltage is decreased on account of motor rotation speed which correlates negatively with a torque increase of said motor in shredding papers, when a voltage is restricted to a minimum by said voltage control block, an operation of said motor is to be suspended or reversed in the case that a current detected by said current and voltage detecting block exceeds a certain level. If a motor current detected by said current and voltage detecting block exceeds a certain level, a motor operation is to be suspended or reversed by a delaying circuit. |
申请公布号 |
HK1058497(A1) |
申请公布日期 |
2009.12.04 |
申请号 |
HK20040101291 |
申请日期 |
2004.02.23 |
申请人 |
NAKABAYASHI CO., LTD.;MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
HIROAKI WATANO;HIROMICHI OMURA |
分类号 |
B02C18/06;B02C;B02C18/00;H02P;H02P29/00;H02P29/02 |
主分类号 |
B02C18/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|