Robust Design On Electromagnetic System Of Three-phase Magnetic Latching Relay Considering The Effects Of Contact Loop

In recent years,due to the continuous increase in power consumption and the increasingly prominent environmental problems,low-power three-phase magnetic latching relays have been used more and more widely.At the same time,the requirements for the reliability of magnetic latching relays are also increasing.The three-phase magnetic latching relay is composed of an electromagnetic system and a contact circuit.The electromagnetic system can maintain no power consumption for a long time due to the role of permanent magnetic steel.With the continuous improvement of the load capacity of the contact circuit,the magnetic field generated by large current will cause electromagnetic interference to the electromagnetic system.In order to make the three-phase magnetic latching relay have good reliability in various complex environments,an integrated model of the three-phase magnetic latching relay electromagnetic system and contact circuit is established.By comparing the two types of magnetic latching relays,the influence of the magnetic holding force on the rated current and short-circuit current is studied.By adjusting the electromagnetic system parameters of the three-phase magnetic latching relay,the electromagnetic system is optimized and the magnetic latching relay is robustly designed.First,the parameters of the electromagnetic system and the contact circuit are determined by measurement.An integrated model of the electromagnetic system and the contact circuit is established in ANSYS software.The torque and magnetic flux data are obtained by simulation,and two types of magnetic latching relays with different structures are compared.The influence of the magnetic field generated by the current at different times in a cycle on the magnetic holding force is analyzed,and the distance between the contact and the electromagnetic system,the size of the moving and static piece of the contact loop are changed without changing the relay structure,in order to analyze the impact on the magnetic retention.Then,the three-phase magnetic latching relay models with different lengths of magnetic steel,different yoke lengths,and different coil turns are simulated and analyzed.The orthogonal design is used to optimize the design of the relay to improve the performance of the magnetic latching relay while reducing the manufacturing of the relay cost.Finally,import the simplified 3D solid model of the relay in Pro/E into the ADAMS software.Apply fixed constraints,rotational constraints and torques to the model,and import torque and flux data.Obtain the rotation speed of armature breaking and closing through dynamic simulation.Draw the dynamic simulation data graph and compare with the experimental graph to verify the accuracy of the model.Through the method of tolerance design,the three-phase magnetic latching relay is optimized,the contribution rate analysis is performed and the tolerance scheme is improved,and the robustness of the product is improved.The research in this paper provides a reference for the development and cost control of three-phase magnetic latching relay products,and has important significance for the electromagnetic compatibility design and optimization of electromagnetic relays.