服务热线 18660772233
0531-55536261
联系在线客服

山东微型电机细分控制技术

来源:http://www.jnmcd.com 发布时间:2019-04-22 浏览:
微型电机是一种将电脉冲转化为角位移的执行机构。当微型驱动器接纳到一个脉冲信号,它就驱动微型电机按设定的方向转动一个固定的步距角,它的旋转是以固定的角度一步一步运转的。所以我们能够很容易经过控制脉冲个数来控制电机转动的角度,同时能够经过控制脉冲频率来控制电机转动的速度和加速度。
Micromotor is an actuator that converts electric pulse into angular displacement. When the micro-driver receives a pulse signal, it drives the micro-motor to rotate a fixed step angle in a given direction, and its rotation moves step by step at a fixed angle. So we can easily control the angle of motor rotation by controlling the number of pulses, and at the same time we can control the speed and acceleration of motor rotation by controlling the frequency of pulses.
常用的微型电机主要有三品种型:可变磁阻式,永磁式和混合式三种。可变磁阻式由根本的转子和定子组成,转子开有齿或槽,在定子磁场中总是转向磁阻最小的位置,能产生中等转矩,步距角为0.9°~ 15°。永磁式微型电机的转子是用圆柱形永磁铁制造,上面有齿或者槽。转矩比拟小,具有坚持力矩,步距角7.5°~90°,普遍用于计算机外围设备和仪器仪表行业。混合式微型电机则综合了永磁式微型电机和可变磁阻式电机的优点,混合式步进电动机产生的转矩大,断电时具有坚持力,步距角大约为0.9°~15°。
山东微型电机
There are three main types of micro motors in common use: variable reluctance type, permanent magnet type and hybrid type. The variable reluctance type consists of a fundamental rotor and a stator. The rotor has teeth or grooves. It always turns to the position with the lowest reluctance in the stator magnetic field. It can produce medium torque with a step angle of 0.9 15. The rotor of permanent magnet micro motor is made of cylindrical permanent magnet with teeth or slots on it. Torque ratio is small, with persistent torque, step angle 7.5 ~90. It is widely used in computer peripheral equipment and instrumentation industry. Hybrid micro-motor combines the advantages of permanent magnet micro-motor and variable reluctance motor. Hybrid stepping motor produces large torque, has persistent force when power is cut off, and the step angle is about 0.9 ~15.
看到很多人说对微型电机停止细分是为了进步定位精度,其实这并不是最主要的要素。细分实践上是可以大大进步电机的运转性能,以二相混合式微型电机为例,假如电机额定电流是5A,采用常规驱动方式时,电机每运转一次,其绕组能相电流将从0突变至5A或从5A变为0,这种电流的忽然变化,势必会惹起电机运转的振动。若采用细分技术,假如是50细分的话,电机没运转一步,其绕组能电流变化只需0.1A,这样能够大大改善电机的振动状况。同时细分后,电机的输出力矩实践上是增加的,特别是关于三相式反响时电机,其力矩比不细分时进步约30-40%,进步了电机的分辨率,减少了步距角,调高了步距的平均度,所以对微型电机停止细分真可谓是益处多多。
See many people say that the micro motor stop subdivision is to improve positioning accuracy, in fact, this is not the main factor. In practice, subdivision can greatly improve the operation performance of the motor. Take two-phase hybrid micro-motor as an example. If the rated current of the motor is 5A, the winding energy phase current of the motor will change from 0 to 5A or from 5A to 0 every time it runs in conventional driving mode. The sudden change of the current will inevitably cause the vibration of the motor. If the subdivision technology is used, if it is 50 subdivision, the motor does not run a step, and its winding energy and current change is only 0.1A, which can greatly improve the vibration condition of the motor. At the same time, after subdivision, the output torque of the motor is increased in practice. Especially for the three-phase reacting motor, its torque is improved by about 30-40% compared with that without subdivision, which improves the resolution of the motor, reduces the step angle and increases the average of the step. Therefore, stopping subdivision of the micro-motor is really beneficial.
以两相反响式微型电机为例,若电机拍数为N,每秒输入f个脉冲时,转子的转速为,在f不变的状况下,改动N,则转速改动,电机细分后N增加,增加其运转拍数,从而减少步距角,这样便使得电机运转的转速降落,为了坚持电机的正常工作运转速度,需求增加相应的脉冲个数。
Take two-phase micromotor as an example, if the number of beats is N and the input of F pulses per second, the speed of the rotor is N, if the speed of the rotor is changed under the condition of F unchanged, then the speed of the rotor is changed. After the motor is subdivided, N increases, and the number of beats increases, thus reducing the step angle. This will make the speed of the motor run down. In order to maintain the normal working speed of the motor, the demand increases correspondingly. The number of pulses.
假如每次输入脉冲切换时,改动的只是对应绕组中额定电流的一局部,那么转子的每步转动也只会是原有步距角的一局部。额定电流分红以几个级别停止切换,转子就以几步来转完一个原有的步距角,经过对微型电机的相电流停止阶梯化控制,使电机以更小的单位步距角运转,从而减小步长和低频振荡。简言之细分驱动的思想是把原来简单的对转子电流的通断过程改动为逐步的改动各相绕组的电流大小和方向,使电机内部的空间合成磁场逐渐改动,这样就能把原来的一个步距角的通电方式改动成为跟随电流的阶梯波,变成多步。由于普通运用的斩波器的频率很高,所以在每个阶段电流的动摇时能够疏忽的,近似为可看做直流输出。
If the change of input pulse is only a part of the rated current in the corresponding winding, then the rotation of the rotor will only be a part of the original step angle. When the rated current dividend stops switching at several levels, the rotor completes an original step angle in several steps. After the step control of the phase current of the micro motor, the motor runs at a smaller unit step angle, thus reducing the step size and low frequency oscillation. In short, the idea of subdivision drive is to change the original simple on-off process of rotor current to gradually change the current magnitude and direction of each phase winding, so as to gradually change the space composite magnetic field inside the motor, so that the original step angle of the power mode can be changed into a current-following step wave, into a multi-step. Because of the high frequency of the common chopper, it can be neglected when the current swings at each stage, which is approximately regarded as DC output.
本文由山东微型电机整理发布,您是不是对这些内容有所了解了呢?更多的内容请点击:http://www.jnmcd.com我们会有更多精彩内容等你查看。
This article is organized and published by Shandong Micro Motor. Do you know something about these contents? For more information, please click on http://www.jnmcd.com. We will have more wonderful content waiting for you to see.
推荐新闻
  • 联系人:张经理
  • 手机:18660772233(微信同号)
  • 电 话:0531-55536261 / 0531-55536272
  • 邮 箱:911510021@qq.com
  • 地 址:山东济南市济南时代欧亚电子大厦一楼A111号
  • Copyright © 2018 济南美磁达电子有限公司 All Rights Reserved 诺商信息 网站地图 XML TXT  鲁ICP备18050301号-1

    鲁公网安备 37010502001057号