A high-current conductive rotary joint for solar subarray power transmission

Abstract

The invention relates to a high-current conductive rotating joint for power transmission of solar sub-arrays, which is used for mechanical connection and power transmission between solar cell sub-arrays of a space power station. The high-current conductive rotating joint comprises an inner conductive shaft, an outer conductive shaft and a rolling rotation structure arranged between the inner conductive shaft and the outer conductive shaft, the inner conductive shaft and the outer conductive shaft are circular in cross section and mutually inserted in a rotating manner, and the rolling rotationstructure includes a contact elastic piece attached to the inner surface of the outer conductive shaft, an electric contact ring attached to the surface of the inner conductive shaft and a pluralityof conductive rolling pins which are arranged between the electric contact ring and the contact elastic piece and uniformly distributed along the circumferential direction. Compared with the prior art, the high-current conductive rotating joint has the advantages that the conductivity is improved, the rotating friction loss is reduced, the dynamic thermal stability is high, and the electrical lifeis long.

Description

technical field [0001] The invention relates to the field of high-power energy conversion and transmission of space power stations, in particular to a high-current conductive rotary joint used for power transmission of solar arrays. Background technique [0002] The space power station is a super-large power generation system that converts sunlight into electrical energy in space, and then transmits the energy to the ground through wireless energy transmission. A large number of cable swivel joints are required to connect solar cell arrays, and the power loss, electrical contact reliability, and electrical life are the difficulties in achieving high-efficiency transmission of large currents. In the conductive rotary joint, although the traditional conductive rotary structure has good starting performance and carrying capacity, but because the contact area of ​​the conductor is too small, the contact resistance is too large, which greatly reduces the transmission efficiency o...

AI Technical Summary

Problems solved by technology

However, there are still some technical problems in the rolling ring conductive joint that make it difficult to be directly used in space solar power plants. The most prominent problem is that the large contact resistance leads to high power loss, which greatly affects the overall efficiency of the entire energy conversion and transmission system.

At the same time, due to the heating caused by excessive loss, it is easy to cause local overheating of the contact point, resulting in equipment failure

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