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Method for controlling stepper motor current

A technology of stepping motors and control methods, applied in the direction of motor generator control, control systems, electrical components, etc., can solve the problems of motor or its drive circuit heating, insufficient torque, etc., to achieve insufficient torque, strong adaptability, and easy operation convenient effect

Active Publication Date: 2015-06-03
TIANJIN YAAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for controlling the current of a stepping motor, which solves the problems of heating of the motor or its drive circuit, insufficient torque, etc.

Method used

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  • Method for controlling stepper motor current
  • Method for controlling stepper motor current
  • Method for controlling stepper motor current

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Experimental program
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Embodiment Construction

[0016] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] A control method for stepping motor current, such as figure 1 shown, including the following steps:

[0018] Step 1 (S01~S02): Obtain a new speed value from the speed collection port, and determine whether the speed value is within the effective adjustment range: if yes, execute step 2 (S03); if not, execute S06 to judge the speed value Whether it is zero: stop if yes, otherwise recycle;

[0019] Step 2 (S03): Generate a new driving current subdivision table according to the effective speed value;

[0020] Step 3 (S04): The motor drive circuit drives the motor to work according to the new drive current subdivision table;

[0021] Step 4 (S05): Determine whether a subdivision cycle has been executed? If yes, return to step 1 and execute step 1 to step 4 cyclically; if not, return to step 3 and continue to execute according to the curr...

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Abstract

The invention relates to a method for controlling stepper motor current. The main technical essentials are: the method comprises the following steps: (1) obtaining an updated speed value from a speed acquisition port, judging the validity of the speed value; (2) generating a new drive current subdivision table according to the valid speed value; and (3) driving the motor according to the new drive current subdivision table. The method disclosed by the invention is designed reasonably, adopts the frequency and amplitude feature capable of changing with the speed to update the current subdivision table, overcomes the defects of a single feature subdivision curve used in existing motor subdivision control, facilitates the control of the stepper motor current, satisfies the stepless speed variation requirements in a wider speed range, nicely solves the problem that the stepper motor or the driving chip thereof heats up at a low speed and has insufficient moment at a high speed, and has the characteristics of strong adaptability, low cost, convenience in operation and the like.

Description

technical field [0001] The invention belongs to the field of motion control, in particular to a method for controlling the current of a stepping motor. Background technique [0002] Stepper motors are widely used in various industries, especially in the field of motion control, due to their low cost, simple and flexible control methods and other advantages. In order to make the running state of the stepper motor more stable, software subdivision is one of the important and effective means at present. The traditional software subdivision method can only realize the adjustment function of the motor speed by changing the frequency of the motor subdivision curve. However, it is difficult to effectively adjust the motor current in a wide range. For example, in some variable-speed pan-tilt control applications, when the hardware drive circuit is built and the software is subdivided, the motor needs to be infinitely adjusted within a wide speed range. Speed ​​regulation, if the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P8/12
Inventor 叶晨刘重斌
Owner TIANJIN YAAN TECH CO LTD