转子导磁导电槽楔材料对汽轮发电机参数和转子表面损耗影响的研究

发布时间：2018-04-02 01:27

本文选题：汽轮发电机　切入点：导磁导电磁性槽楔　出处：《中国电机工程学报》2015年07期

【摘要】：在电机定子或转子的槽楔上采用磁性槽楔材料,可以提高电机的效率。该文以150MW空冷汽轮发电机为例,提出了在发电机转子开口槽内嵌入一种高强度的导磁导电的Fe-Cu合金槽楔替代通常的铝合金或硬铝槽楔,通过建立该发电机二维电磁场数学模型,基于时步有限元法计算了发电机转子采用铝合金槽楔和导磁导电槽楔时转子表面损耗,研究了采用两种不同材料时转子表面附加损耗分布和定子铁心铁耗数值的变化,对比了两种不同槽楔时发电机的饱和电抗值。转子采用导磁导电的Fe-Cu合金槽楔,发电机的饱和同步电抗相对于铝合金槽楔对应的饱和同步电抗减小、短路比增加,发电机气隙内谐波含量降低。此外,采用Fe-Cu合金槽楔材料的强度要好于铝合金槽楔强度。
[Abstract]:The efficiency of the motor can be improved by adopting magnetic slot wedge material on the slot wedge of the stator or rotor of the motor.Taking 150MW air-cooled turbine-generator as an example, a high intensity magnetic conduction Fe-Cu alloy slot wedge is proposed to replace the usual aluminum alloy or hard aluminum slot wedge in the rotor slot of the generator. The two-dimensional electromagnetic field mathematical model of the generator is established.Based on the time-step finite element method, the surface loss of generator rotor with aluminum alloy wedge and magnetic conduction slot wedge is calculated. The distribution of additional loss on rotor surface and the change of iron loss of stator core using two different materials are studied.The saturation reactance values of two different slot wedges are compared.The rotor adopts Fe-Cu alloy slot wedge with magnetic conductivity, the saturation synchronous reactance of the generator decreases compared with the aluminum alloy slot wedge, the short circuit ratio increases, and the harmonic content in the generator air gap decreases.In addition, the strength of Fe-Cu alloy slot wedge material is better than that of aluminum alloy slot wedge material.
【作者单位】：哈尔滨理工大学电气与电子工程学院;北京交通大学电气工程学院;
【基金】：国家自然科学基金项目(51477005)~~
【分类号】：TM311

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