摘要
针对风力发电用永磁同步电机具有转速随机性较强导致端电压不稳定的特点,设计了一种双定子混合励磁同步发电机,并给出其电磁设计方法。利用三维有限元方法分析励磁电流变化时的电机空载磁场分布,并计算绕组磁链、感应电动势及电感等参数。研制了一台8极27槽样机,测试了发电机内外定子相电动势波形及空载特性。实验结果验证了理论分析的正确性,此电机结构合理,可有效提高电机功率密度,通过调节励磁电流,可稳定电机端电压,适用于风力发电等变速发电场合。
The speed of permanent synchronous machine applied for wind power changes randomly, which results in unstable output voltage. To overcome this problem, a dual-stator hybrid excitation synchronous generator （DSHESG） was presented, of which the electromagnetic design method was given. Based on 3- D finite element method, the no-load magnetic distribution was analyzed under different field currents, and some characteristics including flux-linkage and inductance of windings were calculated. Some tests including phase EMF and no-load properties were carried out on an 8 poles prototype generator. The test results verify the validation of theoretical analysis. The novel electrical machine structure is reasonable, and the generating capacity of DSHESG is effectively increased. In addition, the output voltage is maintained stable by regulating field current. It is suitable to the variable speed wind power system.
出处
《电机与控制学报》
EI
CSCD
北大核心
2012年第7期22-28,共7页
Electric Machines and Control
基金
国家自然科学基金(51007033)
江西省科技计划项目(GJJ12332)
关键词
双定子
混合励磁
电磁设计
同步发电机
风力发电
dual-stator
hybrid excitation
electromagnetic design
synchronous generator
wind power
