Working Principle of Tungsten Contacts in Automotive Relay

Working principle of tungsten contacts in automotive relay:
Automotive relay can be thought of as been made up of main circuit which tungsten contacts are working and the control circuit which the coil works. In the relay control circuit, it can only be controlled by tungsten contacts, in order to control its on-off, because the capacity of tungsten contacts  which is used for controlling switch are smaller, therefore, the operating current is small, and it can not be used to directly control the larger load on the power consumption.

Coupled with a certain current or voltage at both ends of the coil of electromagnetic relay, magnetic flux will generate by the coil through the magnetic circuit (its compositions are the armature, yoke, core, working air gap magnetic circuit).

Under the influence of a magnetic field, armature will be attracted to the pole face of the core, thus promoting the normally open tungsten contacts are closed, and normally closed tungsten contacts open;

When the voltage or current across the coil is less than a certain value, the electromagnetic attraction is less than mechanical counterforce, the armature will return to its initial state, normally open tungsten contacts will disconnect, and normally closed tungsten contacts will connect.


Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
 Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
 Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
 Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

• < Prev
• Next >