Influence of Contact Circuit of Magnetic Latching Relay on Magnetic Latching Force

The static characteristics of a type of three-phase magnetic latching relay and single-phase magnetic latching relay are analyzed by ANSYS software. The integrated model of contact circuit and electromagnetic system is established. The influence of contact circuit on magnetic latching force under rated current and short-circuit current is studied by comparing two kinds of magnetic latching relays with different structures. The results show that electromagnetic system will be affected by contact circuit. Interference of magnetic field caused by current to contact system. The influence of the magnetic field generated by the current at different times in a cycle on the magnetic latching force is analyzed, the distance between the contact and the electromagnetic system is changed to change the influence of the magnetic latching force without changing the structure of the relay. It provides a reference for electromagnetic compatibility design and optimization of electromagnetic relays.