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| Design and Analysis of the Ventilation Structure for a Permanent Magnet Wind Generator |
| Zhu Gaojia1, Liu Xiaoming1, Li Longnü1, 2, Gao Shengwei1, 2, Tong Wenming3 |
1. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China;
2. School of Mechanical Engineering Tianjin Polytechnic University Tianjin 300387 China;
3. National Engineering Research Center for Rare Earth Permanent Magnet Machines Shenyang University of Technology Shenyang 110870 China |
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Abstract With the increasing development of the unit capacity and the electromagnetic load, the rational design of the cooling structure has become an important task in the research and development of permanent magnet (PM) wind generators. A 1.65 MW forced-air-cooled direct-drive PM wind generator is investigated based on the computation fluid dynamics (CFD) and the numerical heat transfer theory. The finite volume method (FVM) is employed to analyze the fluid flow and the temperature distributions of the machine with a 3-D fluidic-thermal coupled model. A self-circulated ventilation system is proposed and analyzed to solve the problems of the spaces taken up and the maintain difficulties introduced by the external blowers. The cooling air is driven by the structural plates as the centrifugal fan to cool the generator by passing through the axial and radial vents. The cooling effects of the system with different ventilation structures and sizes are compared, and the proper one is presented. The achievements of this paper can provide certain guidance for improving the heat dissipation capacity of large-scale PM wind generators.
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Received: 10 July 2018
Published: 21 March 2019
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2019, Vol. 34 
