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Shunt Motor

This example shows a model of a shunt motor. In a shunt motor, the field and armature windings are connected in parallel. Equivalent circuit parameters are armature resistance Ra = 110 Ohms, field resistance Rf = 2.46KOhms, and back emf coefficient Laf = 5.11. The back-emf is given by Laf*If*Ia*w, where If is the field current, Ia is the armature current, and w is the rotor speed in radians/s. The rotor inertia J is 2.2e-4kgm^2, and rotor damping B is 2.8e-6Nm/(radian/s).

Manufacturer data for this model gives the no-load speed as 4600rpm, and speed at rated load as 4000rpm. Simulating the model confirms these values and correct calculation of equivalent circuit values.

Model

Shunt Motor Subsystem

Simulation Results from Scopes

Simulation Results from Simscape Logging

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