摘要
对高速隐极同步发电机气隙磁场以及径向电磁力波进行有限元仿真计算与分析,研究并总结了不同磁导率磁性槽楔和不同槽分度数对电机电磁激振力的影响规律,形成抑制该类电机电磁振动的优化方案。通过开展高速发电机机脚实测振动频率与电磁激振力波频谱对比研究,验证了径向电磁力波计算与分析的正确性。在此基础上,对优化方案下的电机电磁振动进行预估分析,转子齿谐波振动加速度级降低达13.5 d B,总振级降低4.6 d B,从而验证了优化方案的有效性,相关分析方法和优化措施为抑制该类发电机的电磁振动提供可靠的参考。
As the high speed non-salient pole synchronous generator electromagnetic vibration was prominent, the air gap magnetic field and the radial electromagnetic force wave of the synchronous generator were analyzed and calculated by the finite element method. The influence of different magnetic permeability slot wedges and different number of slots on the electromagnetic vibration force of the motor was studied and summarized, and the optimization scheme of reducing the electromagnetic vibration was formed. The correctness of the analysis and calculation of the radial electromagnetic force wave was verified by the comparison of the vibration frequency of the motor foot and the electromagnetic vibration force wave spectrum. On the basis of this, the electromagnetic vibration under the optimization scheme was estimated, the rotor tooth harmonic acceleration was reduced by 13.5 dB and the total vibration level was reduced by 4.6 dB, and the validity of the optimization scheme is verified. The relevant analytical method and optimization measure provided a reliable reference for suppressing the electromagnetic vibration of the high speed generators.
出处
《电机与控制应用》
2018年第1期69-76,共8页
Electric machines & control application
基金
国家重点基础研究发展项目(973计划)(2013CB035601)
国家自然科学基金项目(51690181
51407192)
关键词
高速隐极同步发电机
径向电磁力波
磁性槽楔
槽分度数
电磁振动
high speed non-salient pole synchronous generator
radial electromagnetic force wave
magnetic slot wedge
number of slots
electromagnetic vibration
