Method and device for driving brush motor and computer readable storage medium

Method and device for driving brush motor and computer readable storage medium

CN
  • CN 109,756,172 B
  • Filed: 12/29/2018
  • Issued: 03/09/2021
  • Est. Priority Date: 12/29/2018
  • Status: Active Grant
First Claim
Patent Images

1. A method for driving a brush motor, comprising the steps of:

  • randomly generating an initial driving frequency within a first preset frequency range;

    controlling the brush motor to operate at the initial driving frequency;

    calculating according to the initial driving frequency to obtain a second preset value range, wherein a preset upper limit proportion and a preset lower limit proportion are preset;

    acquiring the product of the initial driving frequency and a preset upper limit proportion as a theoretical upper limit value of the second preset frequency range;

    setting an upper limit value of the second preset frequency range as the theoretical upper limit value;

    acquiring the product of the initial driving frequency and a preset lower limit proportion as a theoretical lower limit value of the second preset frequency range;

    judging whether the theoretical lower limit value is greater than or equal to 20000 Hz;

    if so, setting the lower limit value of the second preset frequency range as the theoretical lower limit value, and if not, setting the lower limit value of the second preset frequency range as 20000 Hz;

    and generating a new driving frequency in a second preset frequency range at preset intervals, and controlling the brush motor to operate at the new driving frequency.

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