The function of the slip ring is to electrically connect and transmit power and signal, and the first choice must have excellent electrical contact performance. Since the contact method of the conductive ring is electrical sliding contact, it needs to have abrasion resistance and electrical corrosion resistance.
Through the above points, we can find that conductive slip ring contacts need to have excellent electrical conductivity, good wear resistance, and strong electrical corrosion resistance. We know that Ag is the best conductive property, followed by Cu, Au, Al... But these metals have low hardness and poor wear resistance. In order to make up for this shortcoming, we will add other metal elements to these metals according to actual application requirements.
Has always increased the hardness of materials to enhance wear resistance, alloy materials. In addition to the properties of the material itself, we also need to pay attention to the smoothness of the contact surface. A rough contact surface or a flaw on the contact surface will affect the transmission effect of the electric slip ring.
Slip rings need to transmit a variety of different signals in a restricted space, such as high-frequency alternating current, high-voltage alternating current, high-current alternating current, and weak direct current small signals. Due to the close distance between the rings, various signals will be generated during the signal transmission process. Interference, resulting in distortion of the transmitted information. For general magnetic interference, we use electromagnetic shielding; for electrical interference, we use electric field shielding to reduce
interference.
3. Insulation performance of conductive slip ring
Insulation performance is the safety performance of slip rings, including insulation between loops, insulation between loops and shells, insulation between wires, insulation between loops and wires, insulation between loops and wires and shells. Insulation performance depends on the insulating material. Depending on the production process and use environment of the slip ring, different production processes, the materials and shapes of the insulating materials we use are different, usually we need
The insulation, aging resistance, water absorption, fire rating, high temperature resistance, and mechanical strength of insulating materials should be considered. It is very important to choose the right insulation material for different applications.