Fan hub low-loss power supply structure

The invention relates to a low-loss power supply structure for a fan hub, and effectively solves the problems of high use cost and poorer stability and reliability of hub power supply equipment of an existing wind generating set. According to the technical scheme, an annular cavity is coaxially formed in the side, arranged in a cabin, of a hub shaft, a rotating mutual inductance assembly is coaxially fixed in the annular cavity, and a fixed mutual inductance assembly fixedly installed in the cabin is coaxially arranged in the annular cavity; a plurality of hard pipes are arranged on the inner wall of the annular cavity in a surrounding mode at intervals, the hard pipes communicate with flexible pipes arranged on the wall of the hub shaft, the hard pipes and the flexible pipes are matched to form a closed loop, cooling liquid is stored in the closed loop, and the flexible pipes are matched with a water driving assembly arranged on the hub shaft; according to the scheme, power can be supplied to the hub side fr