Circumferential Cooling Structure for Large-Diameter Motor Coils
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Solution Overview
Problem
Existing wind turbine generators face significant circumferential temperature differences due to uneven airflow distribution, which affects their maximum output and operational safety, as conventional cooling devices fail to achieve uniform airflow and speed distribution effectively.
Innovation Solution
A structure featuring alternately arranged air inlet and outlet holes on a circumferential ring plate, with an inclined baffle and adjustable air volume plates, enhances airflow diffusion and uniformity, forming chambers for improved ventilation and heat dissipation, reducing the temperature difference by 10-20 K.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fans are arranged only at the upper part of the generator base, then the structure is simple, but the circumferential temperature difference increases significantly (30K-40K)
Solution Approach 1:
The invention divides the single fan arrangement into multiple fans distributed circumferentially around the generator base. This segmentation allows airflow to be delivered to different circumferential positions, reducing the temperature difference from 30K-40K to a much lower level while maintaining structural simplicity through modular fan placement.
Solution Approach 2:
The invention applies local quality by positioning fans at specific circumferential locations around the generator base rather than uniformly or only at the upper part. This targeted local airflow delivery addresses the temperature distribution issue by providing cooling where needed most, reducing overall circumferential temperature variation.
2Temperature
If fans are uniformly arranged circumferentially on the generator base, then the temperature distribution improves, but the device complexity increases
Solution Approach 1:
The invention implements segmentation by using multiple fans distributed around the generator base circumference. This approach achieves improved temperature uniformity through localized cooling zones while keeping the overall structure manageable through modular, repetitive fan unit placement rather than a complex integrated system.
3Power
If the generator has large diameter, then the power output increases, but the airflow speed must be high to achieve sufficient cooling, making uniform temperature distribution difficult
Solution Approach 1:
For large-diameter generators, the invention uses multiple fans distributed circumferentially to create multiple localized airflow sources. This segmentation allows each fan to serve a specific zone, ensuring adequate cooling across the large circumference without requiring excessively high airflow speeds from single points, thereby achieving uniform temperature distribution.
Solution Approach 2:
The invention addresses large-diameter generator cooling by applying local quality - positioning fans at specific circumferential locations to deliver targeted airflow to different zones. This ensures that each region of the large generator receives appropriate cooling, maintaining temperature uniformity despite the increased diameter and power output.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves airflow uniformity and heat dissipation, reducing the circumferential temperature difference and enhancing the generator's performance and safety by ensuring more accurate temperature measurement and efficient cooling.
Implementation Method 1
adjusting the area of the air inlet hole for different air inlet holes through adjusting an air volume adjustment plate according to actual needs
Implementation Method 2
the circumferential temperature difference of the generator/motor can be reduced effectively
Implementation Method 3
drive the air inside to flow so as to carry away the heat generated during the operation of the generator
Data Source
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AI summary
Provided is a structure for reducing circumferential temperature difference of a generator/motor coil and core, relating to the field of a wind turbine generator, the structure includes a rotor base, a rotor core and a plurality of rotor magnetic steels, characterized in that, the structure further includes a plurality of stator core segments, a first core pressing plate, a second core pressing plate and a tightening screw, wherein the plurality of stator core segments, fixedly connected to the first circumferential ring plate whose inner wall is fixedly connected to at least three axial plates and outer wall is fixedly connected to a first plate and second plate which are fixedly configured/connected to a second circumferential ring plate, are stacked from silicon steel sheets provided with a slot. An inclined baffle is connected to the first plate via a plurality of connecting plates, and an air volume adjustment plate is provided at an air inlet hole. The present invention may not only improve the circumferential uniformity of airflow, but also may achieve the circumferential uniform distribution of the airflow speed by adjusting the area of the air inlet hole for different air inlet holes, which may reduce the circumferential temperature difference of the generator/motor.