本文目录一览:
- 1、接触器是起什么作用的?
- 2、接触器在电路里起什么作用
- 3、简述接触器的作用和特点
接触器是起什么作用的?
接触器是一种用来接通或断开带负载的交直流主电路或大容量控制电路的自动化切换器,主要控制对象是电动机,此外也用于其他电力负载,如电热器,电焊机,照明设备,接触器不仅能接通和切断电路,而且还具有低电压释放保护作用/。接触器控制容量大。适用于频繁操作和远距离控制。是自动控制系统中的重要元件之一。
接触器的规格很多从10A----到250A的规格都有.也不是非要用它来控制比较大的
电流,这是要看设备所需要的自动控制程度和设备的自身容量而定的...
与接触器内部牵引磁铁相连接的可以做上下运动的触头叫动触头,也叫触桥,静止不动的触头叫静触头,它们
的作用是切断.和接通电路的,
辅助触头的作用是根据接触器的自动控制程度的大小.来用辅助触头进行互锁(自锁)的.和自行控制接触器的启动.和停止的.还可以用它接一些信号指示灯,来指示接触器,和设备的工作情况,的.,它不是什么复杂的电器,你要是有电工基础自己拆开来,一看就会明白的,,,,....
接触器在电路里起什么作用
接触器的作用就是用小电流来控制大电流负载,可以远距离控制,同时可以自锁互锁,防止误动作造成事故,由于是小电流控制,使得保护电路简单可靠。
接触器分为交流接触器(电压AC)和直流接触器(电压DC),它应用于电力、配电与用电。接触器广义上是指工业电中利用线圈流过电流产生磁场,使触头闭合,以达到控制负载的电器。
扩展资料:
接触器的分类
1、直流接触器
直流接触器国内外的发展状况
接触器总体的发展趋势将朝着长电气寿命、高可靠性、多功能、环保型、多规格、智能化、可通信化的方向发展。
2、混合式直流接触器
直流电流与交流电流相比较,不存在周期性的电流数值过零点,因此,传统接触器开断电路时,触头之间产生的电弧较为强烈,燃弧时间也比较长,以便充分释放电路中剩余的能量。电弧的燃烧产生高温和强光,对触头表面有严重的烧蚀作用,触头材料在多次开断之后逐渐流失,触头电磨损严重时,导致直流接触器报废,不能开断电路。
3、直流接触器永磁机构
直流接触器作为应用广泛的电气开关之一,其生产和需求数量巨大,在正常使用过程中,电磁铁线圈一直通电工作,产生电磁吸力,保证铁芯和衔铁吸合,带动动、静触头闭合,接通电路。在上述过程中,线圈本身存在电阻,持续消耗电能,这是直流接触器主要的使用成本之一,浪费了大量的能源和财产,因此,如何降低直流接触器的工作耗能,是研究直流接触器的关键点和重难点。
参考资料:百度百科-接触器
简述接触器的作用和特点
接触器的作用和特点如下:
1、接触器的作用:在电工学上,接触器因为可以迅速切断交流与直流主回路和可频繁地接通与关闭大电流控制电路的装置,所以常会用于电动机做为控制对象,接触器也可以用作控制工厂设备、电热器、工作母机与各样电力机组等电力负载。接触器不止可以接通与切断电路,还有低电压释放保护工作。因为接触器控制容量大,所以适合用于频繁操作与远距离控制。
2、接触器的特点:可以用来频繁地接通和切断主电路、辅助电路及其它控制电路的自动切换电器,能进行远距离自动控制,操作频率高,通断电流大。
接触器的作用
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