Working Principle of Magnetic Latching Relay

  Magnetic latching relay is rapidly developed in recent years, a new type of relay is also a kind of automatic switch and other electromagnetic latching relay. The circuit is automatically switched on and cutting off. The difference is that the Magnetic latching relay normally closed or normally open state is completely dependent on the role of permanent magnets, the switch state transformation is to rely on a certain width of the pulse signal is triggered.

Magnetic latching relays are divided into single/ dual/ three ways control. According to relevant information, the maximum contact conversion current of magnetic latching relays on the market can reach 150A. Control coil voltage is divided into DC9V DC12V and so on. General electrical life 10,000 times; Mechanical life 100000 times; The contact voltage drop of the contact is 100mV. Therefore, it has the characteristics of energy saving, stable, small volume, large carrying capacity and superior performance than the general electromagnetic latching relays. 

After understanding the definition and basic characteristics of relays, let's have a deep understanding of the internal structure of relays.

Magnetic latching relay its contact open state maintained by the magnetic force produced by permanent magnets at ordinary times. When the relay contacts need to open or close state, only need to use DC pulse voltage (DE) to excitate coil, relay is done in a flash drive on state transition. Usually contacts are in a state of latching, coil does not need to power on, magnetic force of permanent magnet alone would maintain the state of the relay.

When the relay contact need setting, only need to use integrity J2 flow pulse voltage excitation coil, coil J2 after excitation produced by interaction between magnetic pole and magnetic pole of permanent magnet, with polarity mutually exclusive, different polarity attract each other, makes the relay setting is done in an instant reset to the state transition diagram 1-4 illustrates the specific state transition process magnetic latching relay for reset state by setting state transition process in the same way.

Pic.1 Relay Reset State

Pic2. J2 Coil Pulse Excitation Moment

Pic.3 J2 Coil Pulse Excitation Instantaneous

Pic.4 Relay Set Successfully

The above is the knowlege of working principle of relay state.For this relay, if you want to know more about it or buy it, please click: https://www.ivy-metering.com/relay-switch/