What is the effect of the structural design of the round tungsten copper arc contact on its performance

The circular contact surface shows superiority in current distribution. The flow transmission of current on the contact surface is realized through the contact surface, while the traditional polygonal or special-shaped contact surface is prone to current density concentration due to the corner effect, which in turn leads to increased contact resistance, uneven heating and welding risks. In contrast, the circular structure can effectively achieve uniform diffusion of current on the contact surface due to its continuous boundary and uniform contour, significantly reducing the peak value of current density. This design not only avoids the generation of hot spots, but also improves the stability of conduction and reduces energy loss. Under high voltage, high current or frequent operation conditions, the uniform current conduction capacity of the circular structure significantly improves the operating efficiency and safety margin of the system.

Arc control performance is one of the key factors affecting the reliability of contacts. The contact surface of the circular structure can form a symmetrical electric field distribution when an arc occurs, so that the arc moves on the contact surface with a stable trajectory, avoiding the arc staying in a local area to cause material melting and structural degradation. The contact made of tungsten copper material itself has good arc erosion resistance. Combined with the circular structure design, it can further suppress the concentrated effect of arc high temperature in a small area, thereby delaying the rate of contact surface degradation and significantly improving the service life. In addition, the radial sliding effect formed by the arc on the circular contact surface helps to automatically remove the oxide layer or impurity accumulation, thereby maintaining a good contact resistance state.

In terms of thermal management, the circular structure design significantly improves the thermal diffusion capacity of the contact. Under high-frequency operation and high-load arc action, the contact faces huge thermal stress shock. If the heat cannot be released in time, it is easy to cause local ablation, fusion welding or material fatigue damage. The circular structure provides an ideal heat diffusion path. Its symmetrical layout allows the heat energy generated by the arc to be quickly and evenly conducted in the internal and external structures of the contact, effectively reducing the stress concentration caused by thermal gradients. The copper component in the tungsten copper material has high thermal conductivity. Under the guidance of the circular structure, it can achieve rapid heat dissipation and maintain the stability of the overall temperature, thereby ensuring the structural integrity and performance continuity under long-term operation conditions.

Anti-fusion welding ability is an important part of the contact structure performance, and the circular design also performs well in this field. When the arc is extinguished, due to the temperature difference between the two ends of the contact and the change in the surface state of the material, welding is likely to occur, resulting in contact adhesion or even stuck switch mechanism. The circular contact surface significantly reduces the probability of molten metal adhesion due to its symmetry and uniform arc pressure distribution. During the disconnection and closing action, the contact pressure generated by the circular structure is evenly transmitted along the central axis, so that the contacts can be separated in a very short time, further reducing the risk of welding. In addition, the high melting point property of tungsten in tungsten copper material also raises the threshold for anti-welding, and the collaborative structural design enhances the operational sensitivity and safety of the system.

From the perspective of mechanical properties, the circular structure has a natural ability to resist deformation. During the operation of electrical equipment, the contacts need to withstand multiple mechanical opening and closing shocks and hot and cold cycles. If the stress distribution is uneven, it is very easy to cause the formation of material fatigue cracks. The circular design effectively eliminates stress concentration points, makes the distribution of mechanical loads in the structure more reasonable, and significantly improves the comprehensive ability of the Round Tungsten Copper Arc Contact to resist impact and fatigue. In application scenarios with high vibration, high frequency and high temperature difference, the circular structure can effectively ensure the long-term stability and reliability of the contacts, meeting the needs of modern electrical equipment for high-performance contacts.