The armature of a DC Motor can be represented by an equivalent circuit. It can be represented by three series-connected elements E, Ra and Vb. The element E is the back emf, Ra is the armature resistance and Vb is the brush contact voltage drop.

DC motor Equivalent circuit. The equivalent circuit of DC Motors (and Generators) has two components: Armature circuit: it can be represented by a voltage source and a resistance connected in series (the armature resistance). The armature winding has a resistance, Ra. The field circuit: It is represented by a winding that generates

A separately excited dc motor is a motor whose field circuit is supplied from a separate constant-voltage power supply, while a shunt dc motor is a motor whose field circuit gets its power directly across the armature terminals of the motor.

Equivalent circuit of DC motors. A DC motor can be represented by the following circuit (Figure 5): Figure 5: DC motor representation. The motor itself is represented by the circle surrounded by the brushes. The external power or power supply, E, is connected to …

DC motors are described by the method used to excite the field. The four most common methods are: separately-excited, shunt-connected, series-connected, and compound. The separately-excited machine has no physical connection between the field and armature windings.

The steady state equivalent circuit of armature of a dc machine is shown in Fig. 5.2. Resistance R a is the resistance of the armature circuit. For separately excited and shunt motors, it is equal to the resistance of armature winding and for series and compound motors it is the sum of armature and field winding resistances.

Blocks like the DC Motor block model motors with fixed or parameter-dependent coefficients with a simple equivalent circuit. These models have an intermediate level of fidelity. Use this block to design controls or systems in actuation applications, such as robotics and mechatronics, and for efficiency predictions when saturation and harmonics ...

A series d.c. motor is a d.c. motor whose field windings consist of relatively few turns connected in series with the armature circuit. The equivalent circuit of this type of motor is shown in Fig.11.8. A distinct feature of a series motor is that the field current is equal to the armature current and the current drawn from the supply , i.e.

This paper is presenting to make an attempt for modeling a DC motor by its electrical equivalent circuit for its simplicity and also the comparativ...

Starting, braking, reversing speed changing and load changing are the Transient Analysis of DC Motor which commonly occur in an industrial drive. One is interested in knowing how current, torque and speed of the driving motor change with time when under these transient operations.