A retaining structure-based heat transfer and dissipation system and a wind generator set are provided. The heat transfer and dissipation system includes a envelop enclosure and power transmission cables that are laid along the vertical direction of the inner wall of the envelop enclosure. The power transmission cables are laid in a shady surface region of the envelop enclosure. The system effectively lowers the surface temperature of the power transmission cables in the envelop enclosure, prolongs the service life of the power transmission cables, and ensures the operation safety of power transmission. The over-temperature problem of the power transmission cables in a tower drum of the wind generator set in a high-temperature natural geographical environment is resolved in a green and zero-energy consumption manner, and the system safety of power transmission is improved.

A motor structure of an unmanned aerial vehicle includes a shaft seat, a stator and an external rotor. The stator is mounted around the shaft seat. The stator has a plurality of winding slots. The external rotor includes a shaft, a hollow body and a guiding cover. The shaft is pivotally disposed on the shaft seat. The guiding cover is disposed on one end of the hollow body, and the guiding cover has a central supporting seat, a plurality of blades and a plurality of air flow openings. The blades are connected to the central supporting seat. Each of the air flow openings is located between two adjacent blades. A number of the blades is greater than or equal to a number of the winding slots.

A multisiphon passive cooling system includes a heat exchanger thermally connected to a heat-generating component located within an enclosure, a distribution manifold located below the heat exchanger, a condensing unit located external to the enclosure and above the heat exchanger, and a first conduit thermally connected to the heat exchanger. The first conduit is fluidly connected to the distribution manifold and the condensing unit. The cooling system also includes a second conduit fluidly connected to the condensing unit and the distribution manifold, a liquid bridge fluidly connected to the first conduit and the second conduit or the distribution manifold, and a two-phase cooling medium that circulates through a loop defined by the first conduit, the liquid bridge, the condensing unit, the second conduit, the heat exchanger, and the distribution manifold. As such, the liquid bridge transfers the cooling medium in a liquid state from the first conduit to the second conduit or the distribution manifold.