关键词: 新型冷却, 直驱, 永磁, 风力发电机

Abstract: The reasonable cooling structure design has become an important issue in the development process of direct drive permanent magnet generators. A new three ventilation cooling structure with radial ventilation channels was proposed through research, simulation and analysis. It was conducted using a direct drive 6 MW permanent magnet wind turbine as an engineering case. The type test of the prototype had been completed, and through comparative analysis with the design results, it could be seen that the design values were in good agreement with the measured values. All performance indicators had met the design expectations, verifying the feasibility of the overall design scheme of the generator and its ability to meet the engineering requirements of the unit. The development of the prototype provides an important reference for the development of high-power direct drive permanent magnet generators in the future.

Key words: novel cooling, direct drive, permanent magnet, wind power generator