A New Force in Latching Relays

The relay industry has developed for nearly two hundred years, and various types of relays have been derived during the process. Among them, the latching relay can be said to be the most popular in circuit applications that do not frequently switch on and off due to its self-retaining and low energy consumption characteristics. It is unique, especially widely used in cost-controlled electricity meters, electric vehicle charging piles, and street light control systems.

At present, latching relays mainly use magnetic latching and mechanical latching relays. In recent years, motor-type latching relays have overcome many shortcomings of holding relays and have begun to enter the market as a new force in latching relays. When the magnetic latching relay is vibrated by an external force, the state switching problem may occur. At the same time, because the contact pressure is not large enough, slight size changes may also cause huge changes in the contact state or pressure. In addition, the magnetic latching relay may not work properly when interfered by external magnetic fields. Mechanical holding relays have complex structures, difficult assembly, and problems such as the inability to achieve normal switching when affected by external magnetic field interference, and have been gradually phased out of the relay market. Traditional motor-type holding relays have a series of problems such as large size, high cost, short mechanical life, and long action time. They can rarely achieve normal switching through a simple structure and stability.

The small motor latching relay discussed this time has a unique internal gear structure and a special transmission method. The structure can be realized with very little copper material, which greatly saves the use of copper materials and saves costs. At the same time This structural feature makes the contact pressure very high, there is no secondary rebound, and the contact will not jitter due to the electromagnetic induction force of the current. It can easily realize automated assembly and automated testing, and greatly improve the use efficiency. In addition, the over-travel design method can ensure that the motor maintains the consistency of the relay quality. The iron-shielded shell of the small motor greatly improves the relay's resistance to magnetic fields and can generally work normally in a magnetic field environment of 400/500mT. Reasonable transmission design and motor matching design make the relay opening and closing time only tens of milliseconds.

As a new force in latching relays, I believe that motor holding relays will be developed and applied in more industries with their outstanding shining points in the near future. The majority of relay industry demanders will also take a fancy to its features and advantages and apply them in their applications. in the project equipment.

For more information about motor latching relays, please email to ess1@ivy-metering.com