Annular cover wind driven generator with annular motor

Abstract

The invention discloses an annular cover wind driven generator with an annular motor. The annular cover wind driven generator comprises an annular rare earth permanent magnet generator, a multi-blade shaft-free wind wheel, an annular rotor, an annular support of the annular rotor, an airfoil section cover, a supporting structure of a generator head and a tower. The multi-blade shaft-free wind wheel is located inside the annular rotor and is limited and supported by the annular support in the airfoil section cover. The annular rotor is located on the outer edge of the multi-blade shaft-free wind wheel and formed by stacking multiple silicon steel sheets. Multiple pairs of neodymium iron boron magnetic steel are embedded inside the annular rotor to be used as the annular support of the wind wheel. A stator of the annular rare earth permanent magnet generator is embedded in the throat of the airfoil section cover and formed by stacking multiple silicon steel sheets, no electric brush is arranged, and a lead-out wire of a coil is arranged in the airfoil section cover. The airfoil section cover is connected with the tower through the supporting structure of the generator head. The airfoil section cover comprises a front cover and a rear cover. The annular cover wind driven generator with the annular motor has stable wind convection performance, efficient electricity generation performance and sensitive start performance and strong wind stalling performance.

Description

technical field [0001] The invention relates to the field of generators, in particular to a ring shroud wind power generator with a ring motor. Background technique [0002] Existing generators such as figure 1 As shown, because the pipe cover is long, large in size and heavy, the economy of the whole unit is affected. How to reduce the length of the tube cover with large diffusion angle has become a key issue to improve the market competitiveness of the cover-type wind turbine. Through the analysis of fan manufacturing cost and economy, we calculated that B≤0.33D2, which is relatively economical. This means that the tube length should be shortened by 67%. However, when the tube length is shortened, the "tube cover" becomes a "ring cover", and the problem of boundary layer separation occurs. Such as figure 2 As shown, the boundary flow is separated sharply at the middle and rear part of the annular shroud, and this phenomenon of detachment affects the speed-up effect o...

AI Technical Summary

Problems solved by technology

However, this method requires additional blowing equipment and consumes power

In practical applications, it is often not applicable

Images