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当前位置: 东方风力发电网>谈技术 >基础知识 > 永磁直驱风力发电机

永磁直驱风力发电机

2009-12-04 来源:中国风电材料设备网 浏览数:2096

  永磁直驱风力发电机的发电机轴直接连接到风机轴上,转子的转速随风速而改变,转子为永磁式结构,变速恒频控制是在定子电路实现的,发电机发出的变频交流电通过变频器转变为与电网同频的交流电。 
  与传统风力发电机相比,永磁直驱风力发电机体积较大,需要解决磁性衰减问题,无增速齿轮箱,整个系统制造成本低,系统运行噪声小;无需外部提供励磁电源,无励磁损耗,电机功率密度高;转速低,力矩大,转子直径大;无自带冷却风扇或外装冷却风扇,结构简单,损耗小,整机组的可靠性和寿命高,运行和维护费用少;可根据要求进行有功功率、无功功率及频率输出的任意调节,谐波分量低,具有很强低电压穿越能力。

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