摘要
通过对三相异步电动机机械特性曲线的分析,结合机械特性函数表达式的推导,提出当三相异步电动机在转差率S很小的范围内运行时,由于电磁转矩与转差率近似成正比,可以用简易方法—比较斜率法来求解转速和转矩。经过与公式法比较,得到较为准确的计算结果,且S愈小,其误差也愈小。
By means of the analysis of the mechanical specific property curve of three-phase asynchronous motor and combined with derivation of mechanical specific property function formula,one kind of simple and easy method—Com- parison slope law—can be used when the three-phase asyn- chronous motor operates in the revolution scope that the slipis very small,owing to the fact that electromagnetic torque with turning the approximate one-tenth direct ratio of slip.The ro- tating speed and torque can be calculated. Compared with the formula law,the calculating accuracy is increased a great deal, the smaller the S,the lower the tolerance.
出处
《电机技术》
2005年第2期26-29,33,共5页
Electrical Machinery Technology
