A major advantage of using a shunt motor is its:

The major advantage of using a shunt motor lies in its constant speed characteristics. This is primarily due to the way the motor is constructed; in a shunt motor, the field winding is connected in parallel (or shunt) with the armature winding. Because of this configuration, changes in load on the motor do not significantly affect the speed of the motor.

When the load increases, the armature current increases, but the field strength remains relatively constant since it depends on the voltage across the field winding, which is not significantly influenced by the armature current. This results in a stable operating speed across a range of loads, making shunt motors ideal for applications where maintaining a consistent speed is crucial, such as in machine tools, fans, and blowers.

In contrast, other motor types may experience significant speed fluctuations with load variations. This highlights the importance of the constant speed characteristic, making it a desirable choice in many engineering applications.