U-120 A Simplified Approach to DC Motor Modeling for Dynamic Stability Analysis

When we say that an electric motor is a device that transforms electric power into mechanical power, we say two things. First, that the motor is ?and behaves as ?a transformer. Second, that it stands at the dividing line between electrical and mechanical phenomena. In the case of permanent magnet motors, this power transformation works in both directions so that the electrical impedance depends on the mechanical load, while the mechanical behavior of the motor depends on the conditions at the electrical end. This being the case, it should be possible to represent a motor ?s mechanical load, on the electrical side, by a set of familiar electrical components such as capacitors or resistors.