Control method for stepping motor, and mobile terminal

A stepper motor, mobile terminal technology, applied in motor control, motor generator control, control system and other directions, can solve problems such as noise

Active Publication Date: 2019-07-05
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a stepping motor control method and a mobile terminal to solve the noise problem caused by idling after the slider driven by the stepping motor moves into place and gets stuck, so as to ensure the service life of the stepping motor and Running accuracy and improving user experience

Method used

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  • Control method for stepping motor, and mobile terminal
  • Control method for stepping motor, and mobile terminal
  • Control method for stepping motor, and mobile terminal

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] For the solution of the stepper motor driving the lead screw and the slider described in the background art section, generally, the optoelectronic device is used to detect whether the slider moves in place, so as to stop the motor after the slider moves in place, so as to shorten the time for generating idling noise as much as possible . For example, by adding a magnet on the slider and detecting the strength of the magnet on the slid...

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Abstract

The embodiment of the invention discloses a control method for a stepping motor, and a mobile terminal. The method comprises the following steps: in a process that the stepping motor pushes a slidingblock to move to a second limitation position from a first limitation position, determining the current position of the sliding block; if a distance between the current position and the second limitation position is greater than a preset threshold value, according to a first current, driving the stepping motor; and if the distance is smaller than the preset threshold value, according to a second current, driving the stepping motor, wherein the second current is smaller than the first current. By use of the embodiment of the invention, noise generated between a lead screw and the sliding blockcan be reduced or avoided, the service life and the operation accuracy of the stepping motor are guaranteed, and meanwhile, user experience is improved.

Description

technical field [0001] The invention relates to the field of mobile terminals, in particular to a control method of a stepping motor and a mobile terminal. Background technique [0002] At present, stepper motors have been widely used, ranging from mechanical engineering to small intelligent terminal equipment, especially intelligent terminal equipment that requires high precision, low power consumption, and cost, such as telescopic cameras of intelligent terminal equipment , using a stepper motor to drive the metal screw and plastic slider mode to achieve the expansion and contraction of the camera. Specifically, when the plastic slider moves to the limit position on the lead screw and gets stuck, due to the large output torque of the motor, the driving lead screw may still be rotating, causing the vibration of the sliding wire between the lead screw and the slider, resulting in noise, and at the same time Noise will also be generated when the stepper motor works abnormall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/12
CPCH02P8/12H02P2207/00
Inventor 张潮红
Owner VIVO MOBILE COMM CO LTD
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