High-current slip rings are one of JINPAT'flagship products, with dozens of new models released every year. Among thesehigh-current slip rings, half are purely power slip rings, while the other halfare multifunctional integrated products. These integrated products not onlyinclude high-current modules but also incorporate signal modules such aspneumatic, hydraulic, and low-current signals. Below is a brief introduction tothe characteristics of the optical fiber and Ethernet signals commonly used in JINPATLPA series high-current integrated slip rings, using the upcoming delivery ofthe LPA000-03300-02150-0230-E3 model as an example.

The LPA000-03300-02150-0230-E3 slip ringhas been delivered to customers multiple times over the past few years. Thecurrent delivery features a slight adjustment in the wiring method, increasingthe distance between the three 300A high-current path wiring bolts and addingan insulating plate between the bolts. The low-current module of this productintegrates two 30A current paths and one Gigabit Ethernet path. GigabitEthernet signals are commonly seen in cap-style hollow shaft slip rings but arerelatively less used in high-current slip rings.

There are two main reasons for thisphenomenon. First, high-current slip rings are fewer in number and have lowerproduction volumes. Second, the transmission distance limitation of Ethernetsignals hinders their widespread application in high-current slip rings.High-current slip rings are typically installed in heavy equipment, which islarge in size, often exceeding the transmission limit of Ethernet signalswithin the slip ring. However, this issue can be resolved by adding a signalbooster to the circuit, allowing signal transmission over several hundredmeters.

As an electrical signal module, GigabitEthernet offers a relatively high transmission rate and is quite cost-effectivewithin the slip ring. However, it ultimately has its performance limitations.To ensure efficient communication between large equipment and remote controlcenters or other systems, single-mode optical fiber slip rings are oftenintegrated into high-current slip rings. Single-mode optical fiber slip ringsnot only offer longer transmission distances and significantly higher datatransfer rates than Gigabit Ethernet but also have excellent anti-interferencecapabilities with minimal transmission attenuation. However, these advantagesalso come with a significant increase in cost, as integrating single-mode,especially multi-channel single-mode optical fiber slip rings, is much moreexpensive than integrating Ethernet paths.