Overload protection method used for electric tool and circuit thereof

Overload protection method used for electric tool and circuit thereof

  • CN 103,872,648 A
  • Filed: 12/11/2012
  • Published: 06/18/2014
  • Est. Priority Date: 12/11/2012
  • Status: Active Application
First Claim
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1. for an overload protection method for electric tool, it is characterized in that, comprise the following steps:

  • Set predetermined current, statistics duration and default overload ratio;

    Acquisition stream is through the actual current of motor;

    The actual current collecting is compared with predetermined current, and statistics actual current in statistics duration exceedes total overload time of predetermined current;

    Total overload time is obtained to actual overload ratio compared with statistics duration, in the time that reality overload ratio is greater than default overload ratio, electric tool is carried out to overload protection.

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