服务热线 18660772233
0531-55536261
联系在线客服

自动门电机厂家告诉你直流电机调速的方法

来源:http://www.jnmcd.com 发布时间:2020-06-16 浏览:
  一种是调节电枢电压,另一种是调节励磁电流,
  One is to adjust the armature voltage, the other is to adjust the excitation current,
  1. 普通的微型直流电机有固定和不可调的永磁体。
  1. Ordinary micro DC motor has fixed and non adjustable permanent magnet.
  所以我们必须调整电枢电压。
  So we have to adjust the armature voltage.
  电枢电压调整:
  Armature voltage adjustment:
  常用的一种是晶闸管调压法,其次是脉宽调制法(PWM)。
  One of the commonly used methods is thyristor voltage regulation, followed by pulse width modulation (PWM).
  H型PWM属于调压调速。PWM H桥只能实现大功率调速。国内超功率调速也是依靠可控硅整流来实现直流电机的电压调节。
山东自动门电机
  H-PWM belongs to voltage regulation and speed regulation. PWM H bridge can only realize high power speed regulation. The domestic super power speed regulation also relies on SCR rectifier to realize the voltage regulation of DC motor.
  2、弱磁调速,通过适当降低励磁磁场也可以调速。
  2. The speed can also be adjusted by reducing the excitation field properly.
  直流电机和交流电机的转速比较
  Speed comparison between DC motor and AC motor
  的优点是直流电动机可以实现“平稳经济的调速”;直流电机的调速不需要其他设备的配合,通过改变输入电压/电流,或励磁电压/电流来进行调速。
  The biggest advantage is that DC motor can realize "stable and economic speed regulation"; the speed regulation of DC motor does not need the cooperation of other equipment, and it can be adjusted by changing the input voltage / current or excitation voltage / current.
  交流永磁同步的调速是通过改变频率来实现的,这就需要使用变频器。
  The speed regulation of AC permanent magnet synchronization is realized by changing the frequency, which requires the use of frequency converter.
  直流电动机虽然不需要其他设备帮助调速,但其自身结构复杂,制造成本高;在使用大量大功率晶闸管之前,大部分的调速应用都采用直流电动机。大功率可控晶闸管工业化生产后,交流电机的调速更加简单,制造成本低,使用寿命长。
  Although DC motor does not need other equipment to help speed regulation, its structure is complex and its manufacturing cost is high. Before using a large number of high-power thyristors, most of the speed regulation applications use DC motor. After the industrial production of high-power thyristor, the speed regulation of AC motor is more simple, the manufacturing cost is low, and the service life is long.
  三、直流电机调速方法的优缺点
  3、 Advantages and disadvantages of DC motor speed regulation method
  不同的需要,采用不同的调速方式,应该说各有什么特点。
  What are the characteristics of different needs and different speed regulation methods.
  1. 在全磁场状态下,可调整电枢电压,适用于零基速范围。无法达到电机的转速。
  1. Under the condition of full magnetic field, the armature voltage can be adjusted, which is applicable to the range of zero base speed. The maximum speed of the motor cannot be reached.
  2. 在电枢全电压状态下,励磁电压可调,适用于基速以上和弱磁提升速度的应用。电机的低速无法达到。
  2. Under the condition of armature full voltage, the excitation voltage can be adjusted, which is suitable for the applications above the base speed and the speed of weak magnetic lifting. The low speed of the motor cannot be reached.
  3.在全磁场状态下,调整电枢电压,待电枢满电压后,弱磁提升率。适用于调速范围广的场合。这是直流电机更完美的调速方式,但设备复杂,成本高。
  3. Under the condition of full magnetic field, adjust the armature voltage, and when the armature is full of voltage, the flux weakening lifting rate. It is suitable for wide range of speed regulation. This is the most perfect speed regulation mode of DC motor, but the equipment is complex and the cost is high.
  以上是山东自动门电机厂家为大家介绍的相关内容,想要了解更多内容,欢迎访问网站:http://www.jnmcd.com
  The above is the relevant content introduced by Shandong automatic door motor manufacturer. If you want to know more, please visit the website: http://www.jnmcd.com
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