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A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft-mounted permanent magnet mechanism, and current is induced into the stationary armature.
The diameter for version C89 is 89 meters, 93 meters for version C93, 96 meters for version C96, and 99 meters for C99. Blade lengths are 43.2m for C89, 45.2m for C93, 46.7m for C96 and 48.2m for C100. Liberty Wind Turbines use 4 generators that have permanent magnets. Each generator delivers 660 kW at 1133 RPM at a voltage of 1350 Vdc.
Goldwind Science & Technology Co., Ltd., commonly known as Goldwind, is a Chinese multinational wind turbine manufacturer headquartered in Beijing, China. [2] [3] Goldwind was a state-owned enterprise before 2007, with largest shareholders including Hexie Health Insurance, China Three Gorges Renewables Group, and the National Social Security Fund, state-controlled corporations holding almost ...
Permanent magnets for wind turbine generators contain rare-earth metals such as neodymium (Nd), praseodymium (Pr), terbium (Tb), and dysprosium (Dy). Systems that use magnetic direct drive turbines require greater amounts of rare-earth metals. Therefore, an increase in wind turbine manufacture would increase the demand for these resources.
The 845-megawatt Shepherds Flat Wind Farm in Oregon is the first windpark in the United States to utilize permanent magnet design in its primary wind turbine. Fântânele-Cogealac Wind Farm in Romania, constructed in 2008, uses 240 GE 2.5xl wind turbines capable of generating a total of 600 MW, powering a million Romanian households each year. [29]
A fully rated converter can either be an induction generator or a permanent magnet generator. Unlike the DFIG, the FRC can employ a squirrel cage rotor in the generator; an example of this is the Siemens SWT 3.6-107, which is termed the industry workhorse. [7] An example of a permanent magnet generator is the Siemens SWT-2.3-113. [8]
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