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Electrical Engineering

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Modeling in Time and Frequency Domain

DC Motor Modeling in Electromechanical Systems

Description

DC motor modeling is a key part of electromechanical systems. These systems combine electrical parts and mechanical parts to produce a useful output. A DC motor is one common example because it turns electrical energy into mechanical motion. It is used in many places, from simple fans to complex robotic mechanisms.

Transcript

机电系统代表了电气元件与机械元件的独特结合,能够实现无缝集成。

直流电机是一种将电压转换为角位移的装置,通过电输入产生机械输出。

当电枢电路中通有电流并在磁场内部时,会受到力的作用,从而产生使转子旋转的转矩。

由于电枢在磁场中旋转时带有电流,其电压与转速成正比。

对电枢电路的拉普拉斯变换应用回路方程,可以揭示电枢电流、施加的电枢电压与反电动势之间的关系。

电机的转矩与电枢电流成正比,比例常数取决于电机和磁场的特性。

转矩与电枢的惯性和粘性阻尼有关。

首先重写转矩方程,以用电机轴的角位置来表示。

此后,假设电枢电感远小于电枢电阻。

简化后,得到传递函数。

Tags

Electromechanical SystemsDC MotorArmature CircuitBack Electromotive ForceTorque ConstantTransfer FunctionLaplace TransformArmature ResistanceElectrical Mechanical ConversionMotor Dynamics