This paper presents the numerical simulation of flow-thermal coupling for 2 MW Doubly-Fed Induction Wind Generator (DFIG).With fundamental assumptions and corresponding boundary conditions, the number of grid is reduced to save calculation time. The temperature of internal air for different cooling system configuration is calculated with commercial FEA software FLUENT without assumption. Four cooling system configurations of DFIG are presented, analyzed and compared in details. The best cooling system configuration of DFIG has been found and will be used into our DFIG production.
-This paper presents the performance investigation and design technology of aLine Start-up Permanent Magnet Synchronous Motor (LSPMSM) with super premium efficiency, including a design consideration and evaluation for motor start-up, key performance, and advanced finite element analysis FEA) for the design, improvement and verification, prototype build and test, design and test data comparison with a Premium ® Efficient Induction Motor (PEIM). To assess the design technology, the LSPMSM prototype was built amended from a PEIM with the same frame, stator punching and rated output. Based on the prototype test, two novel design improvements and analyses have been done to eliminate noise and vibration. Additionally, the comparisons with the PEIM on the power factor, efficiency, frame size and active material consumption indicated that a significant performance improvement and active material cost reduction can be achieved by the LSPMSM.
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