Small vertical shaft magnetic suspension wind driven generator

Abstract

The invention discloses a small vertical shaft magnetic suspension wind driven generator which comprises a static part and a rotating part, wherein the static part comprises upper and lower end cover baffle rings, upper and lower protective bearings, and upper and lower radial magnetic bearing stators which are symmetrically fixed on a vertical stator support shaft from outside to inside along the axial direction, and a generator stator fixed in the middle; an axial magnetic bearing static magnetic ring is fixed on the lower end cover baffle ring, and the stator support shaft is supported on a tower on the ground; the rotating part comprises a wind turbine blade fixed on the shell of a wind turbine; generator double outer rotors are respectively connected to the insides of the upper end cover and the lower end cover of the shell; radial magnetic bearing rotors are respectively embedded into the double outer rotors; and an axial magnetic bearing mobile magnetic ring is embedded to the inner hole of the lower end cover of the shell. According to the invention, the upper and lower radial magnetic bearings respectively realize suspension in four degrees of freedom, namely the left, the right, the front and the back; repulsive force between axial mobile and static magnetic rings and attraction between the mobile magnetic ring and a compression nut support the weight of the wind turbine and can keep balance of axial degree of freedom, thus realizing steady suspension, having no noise and no friction loss, and being low in start wind speed.

Description

technical field [0001] The invention relates to a vertical axis magnetic levitation wind power generator, in particular to a small vertical axis magnetic levitation wind power generator with short axial length, compact structure and stable radial and axial force. Background technique [0002] Small-scale low-wind-speed wind turbines are very suitable for remote areas without grids, and can be used as distributed power sources to provide the required power to these areas. Compared with horizontal-axis wind turbines, vertical-axis wind turbines have a simple structure and can capture different wind directions. They have the characteristics of dispersibility, individual use, and miniaturization. They are especially suitable for pastures, islands, mountains, and roofs. [0003] However, the magnitude and direction of the natural wind are constantly changing. According to the wind speed, it is divided into 0~12 grades, of which 0~2 grades are called light winds, and the correspon...

AI Technical Summary

Problems solved by technology

The Chinese patent publication number is CN204283732U, and the patent literature titled "A Vertical Axis Magnetic Levitation Wind Power Generator" uses radial hybrid magnetic bearings and axial magnetic bearings to achieve five-degree-of-freedom suspension, which completely eliminates mechanical friction. The axial distribution of bearings is too long, the control is complicated, and the amount of permanent magnets is increased, which will increase the cost, which is not conducive to reducing the size and weight of the wind turbine

Images