Introduction: Contactors are widely used in the electrical industry, although the contactor is not very large, the structure is not very complex, but the design of the contactor involves a wide range of subject knowledge, involving mechanical strength, spring design, electromagnetic induction strength, electrodynamic calculations, arc knowledge, arc extinguishing methods, heat generation, heat dissipation and many other knowledge, how to combine these points of knowledge well and design to adapt to Constantly updated market demand is a key point of the current. Simulation analysis as a new design development tools, in more and more research and development has been applied, this analysis simulates a model of contactor in AC voltage, its dynamic core movement process, considering the dynamic core with the splitting ring of the suction process. The analysis conditions: the coil passes AC voltage, the moving process under the consideration of the splitting ring, the moving core spring and other factors. The results of the contactor specific analysis of the dynamic process are shown below
1、The process of magnetic field strength change with time
2, the input voltage of the contactor and the contactor coil current change process with time
The analysis results show that the input voltage is a sinusoidal change process, while the current value in the coil is voltage/resistance with a hysteresis effect in its phase at a later stage due to the effect of inductance, while the dynamic iron core has a significant drop in its current value after closure due to its increased electromagnetic field strength and enhanced inductance. As shown in the figure above.
3, the dynamic iron core of the contactor is subjected to magnetic field force with time change process
The force on the moving core changes accordingly with the change of current, but with the closing of the moving core, after the magnetic field strength increases, the current value decreases, but the magnetic field force increases significantly, as shown in the red line in the figure
4,
the induction current of the split ring with the time process of the split ring induction voltage and current with the coil current change curve in the red line for the coil current, the corresponding blue line for the induction voltage in the split ring, and the brown line for the induction current in the split ring, the graph can see that the voltage and current is almost synchronous
5、Displacement process of dynamic iron core
ANSYS and Maxwell as a structural, electromagnetic, temperature rise, fluid, coupling field analysis software has a wide range of applications in various industries, and as long as The method can be mastered in the actual work of product simulation to produce twice the result with half the effort.
