How to deal with the current pogo pin connector heating?
The high-current connector is strong in the use of electrical functions and is also very good in power. However, because it is a large current and generates a large amount of heat, it will cause some disadvantages in the connection. Everyone knows that U=I^2RT. This power consumption is mainly converted into heat distribution. When the current I remains unchanged, reducing the resistance is the key to the design. At this time, the resistance R=Rc contact resistance and +Rw (pin Jack high current connector own resistance), then how to reduce this resistance R?
1. The roughness of the contact surface of the pin jack:
The appearance of good roughness, its effective contact area is large, the corresponding contact resistance is low, and its electrical power effect is good, and the risk of hot plugging and unplugging is lower.
2. Conductivity coefficient of pin jack material:
The resistance Rw of the material itself depends on this coefficient, which can effectively reduce the resistance and naturally reduce the power input.
Three, the reliable elastic connection of the pin and socket material:
Because of its life expectancy, it is necessary to ensure that it can be firmly contacted when used many times. This has higher requirements on the elasticity of the material and can ensure reliable elastic contact.
Fourth, the processability and economy of the pin and socket material:
The processing efficiency of copper alloys is quite different. At the same time, it must be compatible with the following items. At present, copper (tin phosphor bronze) is more widely used in the market, which has high electrical characteristics and strong elasticity.
Therefore, when designing high-current products, including determining the task current and operating conditions, and then selecting the appropriate wire size, the key is the choice of materials. In high-current connectors, especially when there is a live plugging request, make sure that the pin jacks can be introduced in parallel. Hot plugging has an instantaneous contact or separation. At this time, the actual resistance is infinite and the time is short, but it happens. The heat is also very large, which will damage the device. Therefore, when designing, ensure that the insertion angle is within 3 degrees to ensure smooth insertion and removal. High-current connectors have strong power, but they also have drawbacks. These drawbacks will affect the connection problem. Therefore, the material of the pin jack must be better matched. If the above aspects can be achieved, the natural electrical properties will also change.