Aman Varshney replied to the topic Why DC series motor should never be started without some external load? in the forum Common electrical queries 2 years ago
Speed of the dc motor is inversaly proportional to the field flux per pole, that is proportional to the field winding current.
In case of Dc series motor, Field winding is in series with the Armature wdg., So same current flows through both the windings.
At no load conditions, load torque is zero thus the armature current and hence the field…[Read more]