Stator bar, stator and generator
A stator bar and bar technology, applied in the shape/style/structure of winding insulation, can solve problems such as high temperature ablation, and achieve the effect of avoiding high temperature ablation and improving current carrying capacity
Pending Publication Date: 2022-04-26
DONGFANG ELECTRIC MACHINERY
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Problems solved by technology
[0003] The embodiment of the present application provides a stator bar, a stator, and a generator, which can solve the problem that high-temperature ablation is prone to occur in the overlapping area of the anti-corona structure corresponding to the end area of the existing stator bar and the groove area
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application. In addition, it should be understood that the specific implementations described here are only used to illustrate and explain the present application, and are not intended to limit the present application. In this application, unless stated to the contrary, the used orientation words such as "up" and "down" usually refer to up and down in the actual use or working state of the device, specifically the direction of the drawing in the drawings ; while "inside" and "outside" refer to the outline of ...
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The embodiment of the invention discloses a stator bar, a stator and a generator. The stator bar comprises a bar body, a main insulating layer, a first anti-corona structure and a second anti-corona structure. The winding bar body is provided with a groove part area and an end part area; the surface of the wire rod body is coated with the main insulating layer, the position, corresponding to the groove portion area, of the main insulating layer is coated with the first anti-corona structure, the position, corresponding to the end portion area, of the main insulating layer is coated with the second anti-corona structure, and the resistivity of the second anti-corona structure is larger than that of the first anti-corona structure; the second anti-corona structure comprises a first anti-corona layer and a second anti-corona layer which are stacked; the edge of the second anti-corona structure is partially overlapped with the edge of the first anti-corona structure to form an overlapping area; the lap joint area comprises a first anti-corona structure, a first anti-corona layer and a second anti-corona layer which are arranged in a stacked mode. The first anti-corona structure, the first anti-corona layer and the second anti-corona layer are arranged in the lap joint area in a stacked mode, the current-carrying capacity of the lap joint area can be improved, and the phenomenon of high-temperature ablation of the lap joint area is avoided.
Description
technical field [0001] The present application relates to the technical field of generators, in particular to a stator bar, a stator and a generator. Background technique [0002] The end area of the stator bar of the generator has high potential, complex electric field distribution and concentrated thermal stress. The leakage current and capacitive current at the end of the bar are collected in the slot area of the bar and then to the grounding part of the stator core. With the increase of the rated voltage level of the unit, the current generated at the end of the stator bar increases, the electric field distortion at the end of the stator bar becomes more serious, and the heat loss generated also increases significantly. When the AC withstand voltage test is carried out on the stator bar, the temperature rise of the overlapping area of the anti-corona structure corresponding to the end area of the stator bar and the slot area is relatively high, and high temperatu...
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IPC IPC(8): H02K3/38H02K3/40
CPCH02K3/38H02K3/40
Inventor 黄绍波胡波梁智明
Owner DONGFANG ELECTRIC MACHINERY