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Electric machine

A linear motor and stator technology, applied in the direction of electromechanical devices, magnetic circuit shape/style/structure, magnetic circuit static parts, etc. Elimination of shortcomings, lightweight construction cooling, effect of efficient cooling

Inactive Publication Date: 2012-06-20
THE SWITCH DRIVE SYSTEMS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A disadvantage of prior art wind turbines is their relatively complex and bulky construction
Moreover, the thermal expansion of the separate stator and rotor modules and other similar factors lead to difficulties in the installation and operation of the generator

Method used

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Embodiment Construction

[0024] figure 1 and figure 2 Indicates a direct drive three-phase generator that operates essentially like a permanent magnet radial flux synchronous machine and is designed for use in wind power plants where, as in the case of a permanent magnet radial flux synchronous machine, the flux The radial flow between the stator and the rotor, and the outer arcuate stator consists of segments that actually work independently and when wound well can be called a linear motor. The stator comprises for example 12 linear motors connected in series one behind the other, and the generator has a cylindrical housing 8 provided with end plates 3, stator 2, rotor 1 and external cables 7, and at the ends of the generator The cooling system 6 is equipped with pipelines. The rotor 1 may be directly connected to the shaft (not shown) of the wind wheel.

[0025] The generator is a permanent magnet synchronous machine comprising a cylindrical outer part 31 with a frame of honeycomb structure and...

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Abstract

An electric machine which has an arched stator and a cylindrical rotor fitted inside it and in which the flux flows in the radial direction between the stator and the rotor as in a permanent-magnet radial-flux synchronous electric machine, and in which the stator of the machine consists of stator segments (2), each of which has an independent stator core and winding, and the stator segments are arranged to be physically separate from each other so that the stator consists of stator segments arched according to the radius of the rotor and working electromagnetically independently like a linearmachine, each stator segment having a stator core and a winding separate from the other stator segments, and that it comprises an overhead supporting frame structure separate from the stator cores and consisting of several longitudinal ribs (41) and parts (42) between them.

Description

technical field [0001] The present invention relates to an electric machine operating similarly to a permanent-magnetradial-flux synchronous electric machine, said electric machine having a stator consisting of stator segments operating like a linear electric machine. Background technique [0002] In prior art wind power plants, the wind rotor drives one or sometimes two generators, usually through a gear system. Since the wind rotor in a large wind power plant usually rotates at a speed of 10-20 rpm, the gear system has a transmission ratio close to 100 to provide a certain rotational speed, for example 1500 rpm, to the generator. In a wind power plant with a single-gear planetary gear system, the transmission ratio is close to 10, so the generator usually rotates at 150-250 rpm. Another type of generator known today is the so-called direct-driven generator, which means that no gear system is used and the wind wheel is directly connected to the rotor of the electric machin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/18H02K1/14H02K
Inventor 尤西·赫普乌嫩帕努·库罗宁尤哈·皮尔赫宁
Owner THE SWITCH DRIVE SYSTEMS OY