METHOD AND DESIGN FOR IMPROVING UNIFORMITY OF AXIAL STATOR TEMPERATURE DISTRIBUTION Russian patent published in 2023 - IPC H02K1/20 H02K9/02 H02K1/18 

FIELD: electrical engineering.

SUBSTANCE: method for improving uniformity of axial temperature distribution of the stator includes the following steps: a) installing a structure to improve uniformity of axial distribution of the stator temperature on the wind turbine; wherein the structure comprises rotor base (2) and rotor core (1), wherein rotor core (1) is equipped with several magnetic steel rotor plates (3) located in the axial direction of rotor core (1); the structure additionally comprises stator core (4), first stator pressure plate (5), second stator pressure plate (6), bolt (7) and axial annular plate (8); stator core (4) contains several segments (9) of the core, connected by bolt (7), one end of which is attached to first pressure plate (5) of the stator, and the other end of which is attached to second pressure plate (6) of the stator; air channel (10) is formed between any two of the adjacent segments (9) of the core; axial annular plate (8) is attached between first stator pressure plate (5) and second stator pressure plate (6), and circumferential annular plate (11) is connected to core segments (9), while circumferential annular plate (11) is connected to axial annular plate (8); gap (12) is formed between stator core (4) and rotor core (1), and space (13) behind the stator core is surrounded by first stator pressure plate (5), second stator pressure plate (6), axial annular plate (8) and stator core (4); the radial distance between axial annular plate (8) and segments (9) of the core is equal to the width of gap (12); installation of first pressure plate (5) of the stator, second pressure plate (6) of the stator, axial annular plate (8), circumferential annular plate (11) and core (4) of the stator for the structure to improve the uniformity of the axial temperature distribution of the stator, while the angle between circumferential annular plate (11) and axial annular plate (8) is from 85 degrees to 95 degrees; b) forming a two-way air flow in the axial direction of the stator, having the same amount of air flow between space (13) behind the stator core and gap (12).

EFFECT: improved reliability and stability of the generator/engine by effectively reducing the axial temperature difference between the stator winding and the core.

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