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Generator for wind turbines with different stator clearances in the axial direction of the generator

A technology of wind turbines and generators, applied in wind power generation, electric components, electromechanical devices, etc., can solve problems such as uneven magnetic characteristics, uneven magnetic flux loss, and affecting annual power generation, and achieve the effect of temperature profile balance

Active Publication Date: 2020-01-03
SIEMENS GAMESA RENEWABLE ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, higher currents lead to higher DC winding losses, which in turn negatively affects annual energy production (AEP)
[0004] It was also observed that high temperature causes flux loss during lifetime
Different magnet temperatures with respect to the direction of axial extension of the generator lead to inhomogeneous flux loss after several years of operation
Inhomogeneous magnetic properties in turn lead to unbalanced performance of the generator with increased vibration and fatigue

Method used

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  • Generator for wind turbines with different stator clearances in the axial direction of the generator
  • Generator for wind turbines with different stator clearances in the axial direction of the generator
  • Generator for wind turbines with different stator clearances in the axial direction of the generator

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Embodiment Construction

[0026] The illustrations in the figures are schematic. It should be pointed out that in different figures similar or identical elements or features are provided with the same reference signs or with reference signs which differ from the corresponding reference signs only within the first digit. In order to avoid unnecessary repetition, elements or features that have been described with respect to the foregoing embodiments will not be described in the following description positions.

[0027] figure 1 A schematic cross-section of an exemplary generator assembly 11 comprising a stator 2 , a rotor 3 and a plurality of cooling fans 4 is shown. In their activated state, the cooling fans 4 cause a flow of air F through the rotor-stator gap 5 between the rotor 3 and the stator 2 and through the gap between axially adjacent sections 7 of the stator 2 . Stator clearance 6. in addition, figure 1 The bearing 9, the housing 8 and the axis x of the generator assembly 11 are shown.

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Abstract

It is described an electric generator for a wind turbine, which comprises a stator (2), a rotor (3) and a plurality of stator gaps (6) between axially adjacent segments (7) of said stator (2). At least one stator gap (6) is inclined compared to a radial direction of said generator with respect to an axial longitudinal section and said inclinations between the stator gaps (6) and said radial direction of the generator vary in axial direction. Alternatively or in addition, a width (w1, w2) of the stator gaps (6) between axially adjacent segments (7) of said stator (2) vary in axial direction. Moreover, an electric generator arrangement (1) comprising an electric generator and a fan (4) is disclosed.

Description

technical field [0001] The invention relates to a generator for a wind turbine comprising a stator, a rotor and a plurality of stator gaps between axially adjacent sections of the stator. The invention also relates to a generator arrangement comprising a generator of the above type and at least one cooling fan which, in its activated state, causes air to flow through the gap between the rotor and the stator The rotor stator gap and through the stator gap. Background technique [0002] Generators of the above type, which may be implemented as direct drive generators, are well known. Typically, such generators have diameters in the range of 3 meters and greater, operate at rotational speeds in the range of up to 16 rpm, and generate electrical power in the range of several megawatts. To dissipate the unwanted heat generated by the generator, cooling air can be blown through the stator gap. [0003] Recent research activities have shown that the temperature of the stator dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/12H02K9/04
CPCH02K1/20H02K9/08H02K7/1838Y02E10/72
Inventor G·艾罗尔迪N·马达尼X·图尔德
Owner SIEMENS GAMESA RENEWABLE ENERGY AS