Method and device for controlling stepper motor

Abstract

The invention relates to the technical field of in vitro diagnosis, in particular to a method and device for controlling a stepper motor. The method comprises the steps of substituting characteristicparameters and system operation parameters of the stepper motor into a pre-established rotating speed-output torque mathematical model, generating a rotating speed-output torque curve formula of the stepper motor and generating a rotating speed-acceleration curve of the stepper motor on the basis of the rotating speed-output torque curve formula, total load torque and rotational inertia of load; generating corresponding time-rotating speed curves on the basis of the rotating speed-acceleration curve and discretizing the time-rotating speed curves to generate corresponding control signals, wherein the control signals are pulse frequencies corresponding to various time points on the timeline after the time-rotating speed curve is discretized; and controlling the stepper motor on the basis ofthe control signals. By adopting the method, the out-of-step phenomenon of the stepper motor during high-speed operation is avoided while the acceleration efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of in vitro diagnosis, in particular to a stepping motor control method and device. Background technique [0002] As an actuator, the stepper motor is one of the key products of mechatronics, and is widely used in various automation control systems. With the development of microelectronics and computer technology, the demand for stepper motors is increasing day by day, and they are used in various national economic fields. During the operation of the stepper motor, it is necessary to avoid the occurrence of out-of-step phenomenon and realize the precise control of the stepper motor. During the operation of the stepper motor, it is necessary to ensure that the output torque of the stepper motor at the current speed is greater than the load torque at all times. It is the only condition to avoid stepping motor out of step. The so-called out-of-step means that the number of steps that the stepper motor runs du...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide a stepping motor control method and device to solve the problem in the prior art that the output torque of the stepping motor cannot be fully utilized. During the acceleration process, the time required to reach the maximum speed is relatively short. Long, the acceleration efficiency is low, and it is impossible to ensure that the stepper motor does not have the problem of out of step when it is running at high speed

Images