High current slip rings refer to slip rings that transmit currents above 100A. As we know, power = current² * resistance; the larger the transmitted current, the greater the power, which can lead to higher operating temperatures in the equipment. The high current slip rings developed by JINPAT can reach up to 4000A per channel. When dealing with such large currents, the primary challenge in designing and manufacturing high current slip rings is ensuring stable current transmission and managing the high temperatures generated during equipment operation.
To address this issue, JINPAT's high current slip rings often employ a carbon brush-based friction structure, which effectively stabilizes current transmission. For better heat dissipation, JINPAT's high current rings typically utilize an elevated structural design and are equipped with cooling systems. Additionally, the selection of heat-resistant materials is crucial for enabling JINPAT's high current slip rings to withstand elevated operating temperatures. Since the specifications for carbon brushes required by various equipment can vary greatly, JINPAT's high current slip rings are custom products, offering tailored solutions for different customer needs and application scenarios in terms of slip ring functions, sizes, and more.
Moreover, high current slip rings have stringent requirements regarding voltage fluctuations. Large currents can easily lead to electrical arcing, which significantly affects the oxidation reaction of the slip ring materials and thus impacts their lifespan. Therefore, JINPAT places great emphasis on material selection for the slip rings, employing special processing techniques on the surface to prevent oxidation and corrosion. Additionally, precious metals are often used in the brush contacts to ensure stable transmission and prolong lifespan. JINPAT also has a comprehensive product testing system in place, covering lifespan, waterproofing, torque, etc., to ensure the reliability and validity of their slip ring data, providing visible reassurance to customers.
After understanding the working principle of high current slip rings, let’s explore their applications. The well-known application areas for high current slip rings include marine engineering, such as offshore cable winches, ship cranes, and offshore oil drilling equipment, which require 360° rotation while transmitting power, gas, and liquid. For instance, the JINPAT LPA000-09800-01PE-3020-04L is specially developed for offshore floating cranes, featuring contact points made of precious metals for excellent transmission capability. Its working temperature range can be customized from -20°C to +50°C, and it can operate in high humidity and saline marine environments with humidity levels of up to 95% RH.
The future development trend of high current slip rings is also quite broad. As development demands evolve, lightweight high current slip rings and compact high current slip rings will become research focuses for JINPAT, driving further advancements in various fields for slip rings.