小型非晶三相感应电机铁芯的性能

Performance of stator iron core for amorphous three-phase induction motor

以常见的小型三相异步电机为研究对象,建立了三相异步电机模型,并用铁基非晶材料和硅钢材料分别制作了异步电机的定子铁芯,研究了非晶铁芯与硅钢铁芯的性能和特点。采用软磁交流测试系统对两种材料制成的铁芯进行了交流损耗和矫顽力的测试,测试结果显示:在相同的频率和磁感应强度下,非晶铁芯损耗仅为传统硅钢铁芯损耗的1/3左右,而其剩磁仅为传统铁芯剩磁的1/4,表明非晶铁芯的损耗和矫顽力远小于硅钢铁芯的损耗和矫顽力,且工作频率越高,二者数据差别越大,说明非晶材料较硅钢材料具有更优异的软磁性。建立了三相异步电机的有限元分析模型,对非晶合金铁芯电机和传统硅钢铁芯电机进行了有限元求解。结果显示,采用非晶定子铁芯的电机比传统采用硅钢定子铁芯的电机更加高效节能。该研究成果为深入开展铁基非晶材料在异步电机中的应用提供了参考。

By taking common three-phase asynchronous motors for objective,a motor model was established,and the stator iron cores of the asynchronous motor was prepared by the Fe-based amorphous alloy and silicon steel,respectively.The performance and characteristics of stator iron cores made of Fe-based amorphous alloy and silicon steel were researched.Then,the alternating current losses and coercive forces of two kinds of iron cores were also tested by a soft magnetic testing system.Test results show that the alternating current loss of the amorphous core is only 1/3that of the traditional silicon steel core,and its residual magnetism is only 1/4that of the traditional one under the same frequency and magnetic induction intensity.These data indicate that the alternating current loss and coercive force from the former are far less than that of the latter and the higher the working frequency is,the greater the difference between the two data is,showing that amorphous material has more excellent soft magnetic characteristics than silicon steel materials.Moreover,afinite element analysis model for the three-phase induction motor was established,and the characteristics of the motors made of two different materials were calculated.Results show that the characteristics and efficiency of the motor with the amorphous alloy core are much better than that of the motor with the silicon steel core.These results presented have important significance for the further study of the amorphous motors.