摘要
求得了某大型水轮发电机组的气隙磁场能量和电磁刚度，给出了求解零阶固有频率（以下简称零频）的公式，并求得了额定运行工况下机组轴系扭振的零频；探讨了零频随主要电磁参数：激磁电流和有功功率变化的规律．
We obtained the clearance energy of magnetic field and electromagnetic stiffness of a large hydrogenerator units and derived out the formula of solving zeroorder frequency in this paper,then calculated the torsional vibratory zeroorder frequency under rated running condition,at last,we studied the rule of zeroorder frequency when chief electromagnetic parameters:excitedmagnetic electric current and effective power changed.All conclusions we got in this paper are helpful to the designer and maker of electric machines.
基金
国家自然科学基金
国家教育部博士点基金
关键词
水轮发电机组
零频
固有频率
转子轴系
扭振
hydrogenerator units
zeroorder frequency
excited magnetic electric current
effective power
