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中间继电器的主要作用有哪些?

来源:http://www.jntongyu.com/ 日期:2021-08-24 发布人:tongjid

中间继电器作为继电器的一种,它的原理和交流接触器一样,都是由固定铁芯、动铁芯、弹簧、动触点、静触点、线圈、接线端子和外壳组成。

As a kind of relay, the principle of intermediate relay is the same as that of AC contactor. It is composed of fixed iron core, moving iron core, spring, moving contact, static contact, coil, wiring terminal and shell.
线圈通电,动铁芯在电磁力作用下动作吸合,带动动触点动作,使常闭触点分开,常开触点闭合;线圈断电,动铁芯在弹簧的作用下带动动触点复位。
When the coil is energized, the moving iron core acts to pull in under the action of electromagnetic force, and the moving contact acts to separate the normally closed contact and close the normally open contact; When the coil is powered off, the moving iron core returns with the moving contact under the action of the spring.
一、代替小型接触器
1、 Replace small contactors
中间继电器的触点具有一定的带负荷能力,当负载容量比较小时,可以用来替代小型接触器使用,比如电动卷闸门和一些小家电的控制。
The contact of intermediate relay has certain load capacity. When the load capacity is relatively small, it can be used to replace small contactors, such as the control of electric rolling gate and some small household appliances.
ABB中间继电器价格
优点:不仅可以起到控制的目的,而且可以节省空间,使电器的控制部分做得比较精致。
Advantages: it can not only achieve the purpose of control, but also save space and make the control part of electrical appliances more exquisite.
二、增加接点数量
2、 Increase the number of contacts
这是中间继电器常见的用法,例如,在电路控制系统中一个接触器的接点需要控制多个接触器或其他元件时而是在线路中增加一个中间继电器。
This is a common use of intermediate relay. For example, when the contact of a contactor needs to control multiple contactors or other components in the circuit control system, an intermediate relay is added to the circuit.
三、增加接点容量
3、 Increase contact capacity
中间继电器的接点容量虽然不是很大,但也具有一定的带负载能力,同时其驱动所需要的电流又很小,(www.dgjs123.com电工技术之家)因此,可以用中间继电器来扩大接点容量。比如一般不能直接用感应开关、三极管的输出去控制负载比较大的电器元件。而是在控制线路中使用中间继电器,通过中间继电器来控制其他负载,达到扩大控制容量的目的。
Although the contact capacity of the intermediate relay is not very large, it also has a certain load capacity, and the current required for its driving is very small (www.dgjs123.com Electrotechnical home). Therefore, the intermediate relay can be used to expand the contact capacity. For example, the output of induction switch and triode can not be directly used to control electrical components with large load. Instead, the intermediate relay is used in the control circuit to control other loads through the intermediate relay, so as to expand the control capacity.
四、转换接点类型
4、 Conversion contact type
在工业控制线路中,常常会出现这样的情况,控制要求需要使用接触器的常闭接点才能达到控制目的,但是接触器本身所带的常闭接点已经用完,无法完成控制任务。这时可以将一个中间继电器与原来的接触器线圈并联,用中间继电器的常闭接点去控制相应的元件,转换一下接点类型,达到所需要的控制目的。
In the industrial control circuit, such a situation often occurs. The control requires the use of the normally closed contact of the contactor to achieve the control purpose, but the normally closed contact of the contactor itself has been used up and can not complete the control task. At this time, an intermediate relay can be connected in parallel with the original contactor coil, the normally closed contact of the intermediate relay can be used to control the corresponding components, and the contact type can be changed to achieve the required control purpose.
五、用作开关
5、 Used as a switch
在一些控制线路中,一些电器元件的通断常常使用中间继电器,用其接点的开闭来控制,例如如彩电或显示器中常见的自动消磁电路,三极管控制中间继电器的通断,从而达到控制消磁线圈通断的作用。
In some control circuits, the on-off of some electrical components is often controlled by the opening and closing of their contacts, such as the common automatic degaussing circuit in color TV or display, and the triode controls the on-off of the intermediate relay, so as to control the on-off of degaussing coil.


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