OKYM175W22    交流接触器

概述：

交流接触器利用主接点来控制电路，用辅助接点来导通控制回路。

主接点一般是常开接点，而辅助接点常有两对常开接点和常闭接点，小型的接触器也经常作为中间继电器配合主电路使用。

交流接触器的接点，由银钨合金制成，具有良好的导电性和耐高温烧蚀性。

交流接触器动作的动力源于交流通过带铁芯线圈产生的磁场，电磁铁芯由两个「山字形的幼硅钢片叠成，其中一个固定铁芯，套有线圈，工作电压

可多种选择。为了使磁力稳定，铁芯的吸合面加上短路环。交流接触器在失电后，依靠弹簧复位。

另-半是活动铁芯，构造和固定铁芯-样，用以带动主接点和辅助接点的闭合断开。

20A以上的接触器加有灭弧罩，利用电路断开时产生的电磁力, 快速拉断电弧，保护接点。

接触器可高频率操作，作为电源开启与切断控制时.最高操作频率可达每小时1200次。

接触器的使用寿命很高，机械寿命通常为数百万次至一千万次, 电寿命-般则为数十万次至数百万次。

技术发展

交流接触器制作为- -个整体,外形和性能也在不断提高，但是功能始终不变。无论技术的发展到什么程度，普通的交流接触器还是有 其重要的地位。

空气式电磁接触器(英文: Magnetic Contactor) :主要由接点系统、电磁操动系统、支架、辅助接点和外壳(或底架)组成。

因为交流电磁接触器的线圈一般采用交流电源供电， 在接触器激磁之后，通常会有一声高分贝的"咯” 的噪音，这也是电磁式接触器的特色。

80年代后，各国研究交流接触器电磁铁的无声和节电，基本的可行方案之一是将交流电源用变压器降压后， 再经内部整流器转变成直流电源后供

电，但此复杂控制方式并不多见。

真空接触器:真空接触器是接点系统采用真空消磁室的接触器。

半导体接触器:半导体接触器是一种通过改变电路回路的导通状态和断路状态而完成电流操作的接触器。

永磁接触器:永磁交流接触器是利用磁极的同性相斥、异性相吸的原理，用永磁驱动机构取代传统的电磁铁驱动机构而形成的一种微功耗接触器。

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The AC contactor uses the main contact to control the circuit and the auxiliary contact to conduct the control loop.

The main contact is generally a normally open contact, while the auxiliary contact often has two pairs of normally open and normally closed contacts, and the small contactor is often used as an intermediate relay with the main circuit.

The contact of the AC contactor is made of silver tungsten alloy, which has good electrical conductivity and high temperature ablation resistance.

The power of the action of the AC contactor comes from the magnetic field generated by the exchange through a coil with an iron core. The electromagnetic core consists of two "mountain shaped sheets of young silicon steel stacked together, one of which holds the iron core and has a coil attached to it, and the operating voltage

Available in a variety of options. In order to stabilize the magnetic force, a short circuit ring is added to the suction surface of the iron core. After the AC contactor loses power, it relies on the spring to reset.

The other half is a movable core, a structure and a fixed core, which are used to drive the closure and disconnection of the main contact and the auxiliary contact.

The contactor above 20A is equipped with an arc extinguishing cover, which uses the electromagnetic force generated when the circuit is disconnected to quickly break the arc and protect the contact.

The contactor can be operated at a high frequency as a power on and off control. The maximum operating frequency is 1200 times per hour.

The service life of the contactor is very high, the mechanical life is usually millions to 10 million times, and the electrical life is generally hundreds of thousands to millions of times.

Technological development

The AC contactor is made as a whole, and the shape and performance are constantly improving, but the function is always the same. No matter what degree of development of technology, ordinary AC contactors still have their important position.

The air type electromagnetic Contactor is mainly composed of a contact system, an electromagnetic operating system, a support, an auxiliary contact and a housing (or chassis).

Because the coil of the AC electromagnetic contactor is generally powered by AC power supply, after the contactor excitation, there is usually a high decibel "roo" noise, which is also the characteristic of the electromagnetic contactor.

After the 1980s, various countries studied the silence and power saving of AC contactor electromagnets, and one of the basic feasible solutions is to use AC power transformers after voltage reduction, and then converted into DC power supply by internal rectifier

Electricity, but this complex control mode is rare.

Vacuum contactor: A vacuum contactor is a contactor with a vacuum degaussing chamber for the contact system.

Semiconductor contactor: A semiconductor contactor is a contactor that completes current operation by changing the on-state and off-state of the circuit circuit.

Permanent magnet contactor: permanent magnet AC contactor is a kind of micro power contactor formed by replacing the traditional electromagnet drive mechanism with a permanent magnet drive mechanism by using the principle of the same sex repulsion and opposite attraction of the magnetic pole.

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