Slot wedge element, stator device, motor and wind turbine generator set

Abstract

The invention relates to a slot wedge element, a stator device, a motor and a wind turbine generator set. The slot wedge element is used for a stator device, the slot wedge element extends in a firstdirection and has opposite first and second edges, the slot wedge element has a first surface and a second surface in a thickness direction of the slot wedge element itself, and the slot wedge elementis attached to a winding of the stator device through the first surface; and the second surface includes a first portion, a second portion and a third portion sequentially distributed in the first direction; wherein a second thickness between the second portion and the first surface is greater than a first thickness between the first portion and the first surface and a second thickness is greaterthan or equal to a third thickness between the third portion and the first surface, the first thickness being distributed in a decreasing direction from the second portion to the first edge. The invention makes the cooling air in the radial channel of the stator device distribute more uniformly along the axial direction by setting the slot wedge element, and improves the cooling effect of the motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a slot wedge element, a stator device, a motor and a wind power generating set. Background technique [0002] When the motor (including generators and motors) converts mechanical energy into electrical energy or vice versa, there will be certain losses inside the motor, especially the stator conductor loss, including winding copper loss and core iron loss, and these losses will be converted into heat. Motor temperature rises. Due to its large heat dissipation area and better cooling effect, the radial ventilation cooling method has gradually become one of the commonly used cooling methods for motors, especially in large wind turbines. [0003] Such as figure 1 , 2 As shown, in the motors in the prior art, especially in the permanent magnet synchronous wind power generators, the radial ventilation cooling method is mostly through the air gap A formed between the stator 1 and the...

AI Technical Summary

Problems solved by technology

[0007] Since the loss distribution of the stator 1 is relatively uniform, the cooling medium with uneven axial flow distribution in the multiple radial channels W makes the stator device W unable to be cooled uniformly in the axial direction, causing the temperature of the stator 1 to appear in the axial direction large differences, such as figure 1 As shown in the stator temperature distribution curve in , the temperature distribution along the axial direction of the stator with a relatively uniform loss distribution is ultimately uneven, which leads to problems such as local overheating and large structural thermal stress of the stator 1.

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