Drive control device and drive control method for stepping motor

Abstract

The invention provides a motor drive control device and a drive control method. Based on the present invention, the detected phase voltage and phase current of the stepper motor can be used to determine the back electromotive force of the stepper motor, and the speed of the stepper motor can be determined according to the back electromotive force of the stepper motor. The non-inductive observation; according to the speed determined by the non-inductive observation method, the driving power generated by the inverter drive module to the stepping motor can be adjusted to make the driving power follow the The speed matches the load change and changes adaptively to avoid stepping motor out of step. Moreover, according to the rotational speed determined by non-inductive observation, it can also switch to a lower driving power when the rotational speed is too low to reduce the power consumption of the stepping motor.

Description

technical field [0001] The invention relates to motor drive technology, in particular to a drive control device for a stepper motor and a drive control method for a stepper motor. Background technique [0002] The drive control of the stepper motor usually adopts an open-loop control method. When the stepper motor based on the open-loop control method is used to provide power output for the pan / tilt of the camera, it is prone to out-of-step phenomenon. For example, in order to track a moving target or switch between different targets, the camera will have a short-term high-speed movement requirement. Such a short-term high-speed movement will cause an instantaneous load increase to the stepper motor. If the load increase is too large, the It will cause the stepping motor to lose step, which will cause the monitoring of the camera to lose its position. [0003] Therefore, how to avoid the step-out of the stepping motor has become a technical problem to be solved in the prior...

AI Technical Summary

Problems solved by technology

[0002] The drive control of the stepper motor usually adopts an open-loop control method. When a stepper motor based on an open-loop control method is used to provide power output for the pan / tilt of the camera, it is prone to out-of-step phenomenon

For example, in order to track a moving target or switch between different targets, the camera will have a short-term high-speed movement requirement. Such a short-term high-speed movement will cause an instantaneous load increase to the stepper motor. If the load increase is too large, the It will cause the stepping motor to lose step, which will lead to the monitoring of the camera out of position

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