Electric tool and its calibration method

Electric tool and its calibration method

  • CN 109,687,776 A
  • Filed: 10/17/2017
  • Published: 04/26/2019
  • Est. Priority Date: 10/17/2017
  • Status: Active Application
First Claim
Patent Images

1. a kind of electric tool, comprising:

  • Brushless motor;

    Position sensor, for detecting absolute fix signal;

    Counter electromotive force detection module, for detecting the back-emf signal of the brushless motor;

    Drive module, for driving the brushless motor to rotate;

    Calibration module obtains calibration bits confidence according to the back-emf signal of the absolute fix signal and the brushless motorNumber;

    Controller is used forJudge whether the brushless motor is in constant speed state, activates the calibration when the brushless motor is in constant speed stateModule work.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×