Method for determining lamination height of stator core sections of permanent magnet direct-driven wind driven generator

Abstract

The invention discloses a method for determining the lamination height of stator iron core sections of a permanent magnet direct-driven wind driven generator. The method comprises the following steps of: 1) acquiring design air volume Q, the number n of stator air ducts, the height h of the stator air ducts, the axial height L of a stator iron core and size information of other generators; (2) determining the number of iron core section parts and the number of the iron core sections in each part for the first time; 3) determining the lamination height of the iron core sections for the first time; 4) determining the air volume of the air ducts for the first time on the basis of the information in the step 1 and the step 3; 5) re-determining the lamination height of the iron core sections; (6) rounding the lamination height of the iron core sections except iron core sections at edge ends; 7) re-determining the lamination height of the side end iron core sections; 8) re-determining the air volume of the air ducts according to the information of the step 1, the step 6 and the step 7; and (9) finally determining the lamination height of the stator iron core sections by taking the difference between the two adjacent air duct air volumes as a judgment basis. Compared with an existing common iron core section lamination height determination method, the method has the following advantages that: the maximum temperature of a stator can be effectively reduced while the axial temperature of the stator is more uniform; and the operation stability of the generator is improved.

Description

technical field [0001] The invention relates to a method for determining the lamination height of the stator core section of a permanent magnet direct drive wind power generator, more specifically, to a method for improving the temperature distribution of the stator core section of a permanent magnet direct drive wind power generator to make it more uniform. How to determine the height of the sheet. Background technique [0002] The stator of the permanent magnet direct drive wind turbine is mainly cooled by air flowing through the air ducts formed by the stator core segments and the ventilation channel steel between them. At present, the commonly used method for determining the lamination height of each iron core section is: on the basis of the known number of wind grooves, wind groove height, and axial height of the stator core, the axial height of the stator core is subtracted from the height of each wind groove to obtain the total height of the stator core section, Then...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to solve the problem of uneven temperature distribution in the axial direction of the stator caused by the uniform height of each iron core section of the permanent magnet direct drive wind turbine, and propose a new method that can reduce the size of the stator The highest temperature can make the axial temperature of the stator more uniform, thereby improving the stability of the generator operation

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