Mixed type medium-speed permanent magnet wind generator and generator set thereof

Abstract

The invention discloses a mixed type medium-speed permanent magnet wind generator which comprises a stator, an outer rotor and an inner rotor from the outside to inside in sequence; the stator comprises a stator iron core, a stator winding and a permanent magnet adhered to the inner surface of the stator iron core; the outer rotor comprises magnetic-conductive iron yokes and non-magnetic-conductive blocks filled among the magnetic-conductive iron yokes; the inner rotor comprises an inner rotor permanent magnet and an inner rotor rotating shaft arranged in the inner rotor permanent magnet; andthe above structure constitutes a medium-speed permanent magnet generator and an electromagnetic transmission. The invention further discloses a PDD (Pseudo Direct Drive) permanent magnet wind generator set. The size and the weight of the mixed type medium-speed permanent magnet wind generator provided by the invention correspond to those of a conventional medium-speed permanent magnet generator;the PDD permanent magnet wind generator set dispenses with a high-power speed change gear box and has the reliability as high as that of a direct-drive permanent magnet wind generator set; besides, not only are the size, the weight and the cost of the permanent magnet generator reduced, but also the transportation problem of large direct-drive permanent magnet wind generator set can be solved.

Description

technical field [0001] The invention relates to a permanent magnet wind power generator and a wind power generating set composed thereof, in particular to a hybrid medium-speed permanent magnet synchronous wind power generator and a collimation-driven large permanent magnet synchronous wind generating set composed of the same. Background technique [0002] With the increasing demand for wind power energy in the world, the technological advancement and production cost of wind turbines pose more and more challenges. At present, among the large-scale wind turbines with a power of megawatts and above, the wind turbines using permanent magnet generators include high-speed permanent magnet wind turbines, medium-speed permanent magnet semi-direct drive wind turbines and direct drive permanent magnet wind turbines. The high-speed permanent magnet wind turbine has high speed, small size, light weight and high efficiency, but the transmission chain of the high-speed permanent magnet w...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing large-scale high-speed permanent magnet wind turbines, medium-speed permanent magnet semi-direct drive wind turbines, direct drive permanent magnet wind turbines or the need for high-power gearboxes or large size and weight, high cost, and difficult transportation The purpose of the present invention is to provide a hybrid medium-speed permanent magnet wind generator and its unit; The direct-drive wind turbine does not need a high-power transmission gearbox, and has the same high reliability as the direct-drive permanent magnet wind turbine, which not only reduces the size, weight and cost of the permanent magnet generator, but also solves the problem of large direct-drive permanent magnet Transportation issues for wind turbines

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