Noise filtering method of motor, recording medium and control circuit thereof

Abstract

The invention provides a noise filtering method for a motor, wherein the motor rotates according to an operating voltage. The noise filtering method comprises the following steps: setting an inspection period and a minimum threshold value; generating a pulse signal according to an operating voltage; and judging whether the time corresponding to each sub-pulse signal in the pulse signal conforms tothe inspection period, and judging whether the pulse width corresponding to each sub-pulse signal is not smaller than the minimum threshold value.

Description

technical field [0001] The present invention relates to motor drive technology, in particular to a noise filtering method for a motor, a recording medium and a control circuit thereof. Background technique [0002] Motors are the main source of mechanical power for electronic devices, and motors can be rotated according to analog signals. In order to monitor the rotation of the motor, the analog signal can be converted into a digital signal and processed by the sensor. Since the analog signal contains noise, during the conversion process, the noise will also be converted into a part of the pulse signal in the digital signal to appear. [0003] In an ideal operating state, one complete rotation of the motor corresponds to a pulse signal of a fixed time. Therefore, those skilled in the art can obtain the operating distance of the mechanism driven by the motor with reference to the number of pulse signals. If the converted digital signal already contains the pulse signal corr...

AI Technical Summary

Problems solved by technology

If the converted digital signal already contains the pulse signal corresponding to the noise, it will cause an error when the user converts

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