双定子笼障转子无刷双馈发电机冷却空气流变特性数值分析

doi:10.19595/j.cnki.1000-6753.tces.180184

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Abstract Doublestator cage-barrier rotor brushless doubly-fed generator(DSCBR-BDFG) has unique advantagesof strong magnetic coupling ability, high power density and good fault-tolerant performance because of using back-to-back cage-barrier rotor and double stator structure. The local temperature rise of this type of generator is higher at the rated operation due to poor heat dissipation and complicated structure. Therefore, it is significant to research the cooling airflow characteristics in the ventilating structure for cooling system optimization design.The mechanical structure, winding connection mode and excitation control system of a 50kW DSCBR-BDFG prototype are expatiated. 3-D physical model including the internal and external fluid regions and mathematical model are established respectively. Then a few basic assumptions and boundary conditions are given and the turbulence control equations are solved numerically by finite volume method based on the fluid mechanics theory. The spatial distribution characteristicsabout the air velocity, fluid flow and path line are analyzed in detail. The research shows the distribution rules of internal cooling medium rheological properties of DSCBR-BDFG. It provides the basis to optimize the ventilated cooling structure subsequently.

Key words： Double statorcage-barrier rotorbrushless doubly-fed generator mechanical structure ventilation structure fluid flow characteristic finite volume method

Received: 05 February 2018 Published: 31 January 2019

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TM352

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	Jiang Xiaodong
	Zhang Fengge
	Zhou Dangsheng
	Kong Lingjiang

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Jiang Xiaodong,Zhang Fengge,Zhou Dangsheng等. Numerical Analysis of Cooling Air Flow Characteristic for Double Stator Cage-Barrier Rotor Brushless Doubly-Fed Generator[J]. Transactions of China Electrotechnical Society, 2019, 34(3): 466-473.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180184 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I3/466

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