TaV / sIagraph of a DC series motor is a straight line throughout

The TaV / sIagraph is a graph that shows the relationship between the torque and armature current of a DC motor. In a DC series motor, the field winding and armature winding are connected in series, which means that the same current flows through both windings. As a result, the magnetic field generated by the field winding is proportional to the armature current.

Explanation:

The TaV / sIagraph of a DC series motor is a straight line throughout because the torque produced by the motor is directly proportional to the armature current. As the armature current increases, the torque also increases linearly. This is because the magnetic field generated by the field winding increases with the armature current, which in turn produces more force on the armature.

At no-load, the armature current is very low, and the torque produced by the motor is also very low. As the load on the motor increases, the armature current increases, and the torque produced by the motor also increases linearly. However, there is no point in the TaV / sIagraph where the relationship between torque and current becomes non-linear.

The reason for this is that the magnetic field generated by the field winding is proportional to the armature current, and the force produced by the magnetic field on the armature is also proportional to the magnetic field. Therefore, the torque produced by the motor is directly proportional to the armature current, and the relationship remains linear throughout the operating range of the motor.

Conclusion:

In conclusion, the TaV / sIagraph of a DC series motor is a straight line throughout. This is because the torque produced by the motor is directly proportional to the armature current, and there is no point in the operating range of the motor where the relationship between torque and current becomes non-linear.