毕业设计：三相单鼠笼异步电动机的设计(论文)

摘  要

设计一台电机时,必须确定许多尺寸,但其中起主要与决定作用的是电机的主要尺寸。主要尺寸确定后，其它尺寸也就可以大体确定。电机的工作特性和运行可靠性也都和主要尺寸以及它们的比值有密切关系。

当绕组中通过电流，在电机的有效部分、端部及部分零件中就激发了磁场。为了简化物理图象及电磁计算，把电机中的磁场部分为主磁场及漏磁场。磁路计算的目的在于确定产生主磁场所必须的磁化力，并进而计算励磁电流以及电机的空载特性。

电阻、电抗是电机的重要参数。电阻的大小不仅影响电机的经济性，并且与电机的运行性能亦有极密切的关系。绕组电抗的大小亦对所设计的经济性及运行性能有很大的影响。因此正确选定及计算这些参数是极其重要的。

在主要尺寸、气隙以及定转子绕组和铁心设计好以后，就要进行工作性能的计算和起动性能的计算。三相单鼠笼异步电动机的起动性能主要是指起动转矩和起动电流对相应额定值的倍数。三相单鼠笼异步电动机的起动特性则由电机的参数决定。

关键词 ：电动机 ,电磁路参数，工作性能，起动性能

ABSTRACT 

Much dimensionss have to be fixd when designing an electrical machinery , yet what in it takes chiefly together with resolves the action is the main dimensions of electrical machinery .The main dimensions is fixd queen ，Else dimensions also may be fixd on the whole .Electrical machinery work property and the operation dependability  also wholly possess the intimate relationship with main dimensions along with their ratio .

By means of the electric current coil in ，Electrical machinery significant part is living 、Stimulate magnetic field in butt and the part of spare parts .For the sake of simplification physics image and electromagnetism calculation ，Partly give priority to that the magnetic field reaches by mistake magnetic field in the electrical machinery to .The magnetic route calculation aim rests with certainly comes into being the bureau in primary magnetic field have to magnetization force ，Advance side by side but calculation excitationelectric current along with electricalmachinery idling performance .

    Resistance、The reactance is the significant parameter of electrical machinery .The size of resistance not merely affects the electrical machinery economy ，Moreover operational performance against the electrical machinery too possess the exceedingly intimate relationship.The coil reactance size too possess the very great effect to design economy and operational performance .Hence it is the most significant correctly to fix calculation these parameters .

    He main dimensions is living 、After air gap along with fix rotor winding and the core is designed to be in good health ，Will do performance calculation and starts performance calculation.It chiefly is starting torque and the minimum running current multiple to the relevant nominal value that three-phase list asynchronous electric motor of squirrel cage starts the performance .Three-phase list asynchronous electric motor of squirrel cage starting characteristic the parameter resolution through the electrical machinery .

 Keywords  Electric motor , The electromagnetism route parameter ，Work performance ，Start performance