Large-scale dual-rotor direct-drive permanent magnet wind turbine and its generator set

Abstract

The present invention relates to a large-scale dual-rotor direct-drive permanent magnet wind power generator and a generating set thereof. The generator includes a stator and a rotor. The rotor is a dual-rotor structure including an outer rotor and an inner rotor; the stator is mainly composed of stator iron Core, outer ring group and inner ring group, the inner and outer ring groups correspond to the in-phase windings in anti-phase series; the stator is located between the outer rotor and the inner rotor, the outer rotor and the stator form the first working air gap, and the inner rotor and the stator form the second Two working air gaps, the first working air gap is connected in series with the second working air gap magnetic circuit. The generator set also includes a hub, a main shaft, a rotor turntable, a casing and a frame, and the stator is fixed inside the casing; the inner and outer rotors are connected and synchronized with the main shaft and the hub through the rotor turntable. The invention adopts a double-rotor ring winding structure, which greatly improves the torque power density of the motor, makes full use of the internal space of the motor, reduces the volume and weight of the motor, reduces the production cost, and facilitates transportation.

Description

technical field [0001] The invention relates to a large-scale direct-drive permanent-magnet wind-driven generator, in particular to a large-scale double-rotor direct-drive permanent-magnet wind-driven generator and a generating set composed of the same. Background technique [0002] With the continuous development of the wind power industry, wind power technology is also constantly upgraded and updated, mainly manifested in: increasing the capacity of a single unit, developing new technologies to improve the performance of wind turbines, improving the utilization rate of wind energy, reducing the cost of wind power, and paying more attention to the safety and security of wind turbines. System reliability control. The direct-drive full-power conversion type wind turbine is connected to the grid through the frequency converter, which has a strong ability to ride through grid faults, has a certain ability to support the grid, avoids the maintenance workload of high-power gearbo...

AI Technical Summary

Problems solved by technology

However, due to its low speed, as the power increases, the manufacturing process of multi-pole permanent magnet synchronous generators is complicated, the technology is difficult, the motor is large in size, high in cost, and difficult to transport

At the same time, with the continuous increase of unit capacity, high-power inverters are expensive and increase their use costs.

[0003] Thus it can be seen that above-mentioned existing large-scale direct-drive permanent magnet wind-driven generator obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently

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