【摘要】 针对混合励磁风力发电机的结构、损耗分布、散热条件和运行状态复杂的特点,以一台100kW变速恒压混合励磁风力发电机为例,采用有限元法对发电机进行热计算,揭示不同运行状态(最大增磁、额定运行和最大去磁)下发电机的温升分布规律。分析电励磁电流零点设计对发电机励磁绕组铜耗和温升分布的影响,确定了电励磁电流零点设计原则;同时分析风速和散热面积对发电机温升的影响。对100kW混合励磁风力发电机样机进行温升实验,通过实验和计算结果的对比分析,验证了计算结果的正确性。更多还原

【Abstract】 The structure, loss distribution, heat dissipation condition and running state of hybrid excited wind generators are complex. Taking a 100 kW hybrid excited wind generator as an example, the thermal analysis of the generator is carried out by the finite element method, and the temperature rise distributions of the generator under different operating states(maximum magnetization, rated operation and maximum demagnetization) are revealed. The influences of the field current passing through the zero point on the copper loss of the field winding and the temperature rise distribution are analyzed, and the selection principle of the field current passing through the zero point is determined. At the same time,the influences of wind speed and heat dissipation area on the temperature rise of generator are analyzed.The thermal test of the prototype of is carried out. The accuracy of the calculated results is verified by comparing the experimental results with the calculated results.更多还原