Driving method, system and storage medium of stepping motor

Abstract

The invention discloses a driving method, system and storage medium of a stepping motor. The method includes: setting the rotation stroke of the stepping motor in advance according to the application scene; The stepper motor accelerates to the middle position of the rotation stroke in two phases, and then drives the stepper motor to decelerate in two phases to the holding position and stops; at the holding position, the single coil maintains; in response to the reverse rotation command, drives the stepping motor to accelerate to the rotation stroke in two phases The middle position, and then drive the stepping motor two-phase deceleration to the initial position to stop. By adopting the method, the stepper motor can be started and stopped quickly and smoothly in a fixed stroke.

Description

technical field [0001] The invention relates to a driving method of a stepping motor, in particular to a driving method of a stepping motor applied to an optical path switch, a driving system for implementing the method, and a storage medium for storing the method. Background technique [0002] The optical path switch is generally used in the switch control of the laser beam. By rotating the shutter to the designated position, the beam can be completely turned off, so as to achieve the controllable switch of the beam in the optical path. With the miniaturization of the optical path, the mechanical shutter generally needs to have the characteristics of small size, low noise, fast response, and fast and accurate shutdown. [0003] The optical switch is usually composed of three parts: a light barrier, a stepping motor and a drive circuit. The function of the light blocking sheet is to block light. By fixing the light blocking sheet on the rotor of the stepping motor, when the...

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Problems solved by technology

It is common that the moment of inertia of the stepper motor rotor of this volume is less than 10gm^2, and the moment of inertia of the light blocking sheet is greater than that of the stepping motor rotor itself. In this way, when the moment of inertia of the light blocking sheet is too large, the traditional subdivision In the foot-driving method, there will be vibration caused by the continued movement of the light barrier after reaching the designated position due to inertia.

For example: for a common 20-step stepper motor that meets the volume requirements (18 degrees for a single step, the torque is about 1mNm), after installing the light barrier, the single step time is about 4ms, and the time for two steps to 36 degrees It is about 6ms, but due to the inertia, it will swing back and forth around this angle, and the final stop time is about 100ms. The maximum angle of the initial overshoot can reach more than 18 degrees. Overshoot will affect the light blocking effect. Generally, the mechanical shutter can respond quickly. The shape of the designed light barrier is slightly larger than the spot size, and once the overshoot exceeds 2-3 degrees, it cannot be turned off, so the traditional subdivision drive cannot be applied to the miniaturized optical path that requires fast optical switches

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