Series-Wound Motor:
Because the armature and field in a series-wound motor are connected in series, the armature and field currents become identical, and the torque can be expressed as shown in Equation (6-8).
T = KI2a (6-8)
The torque-vs-speed features of a series-wound motor along with a constant voltage source are display in Figure. As the speed decreases, the torque for a series-
![1562_Series-Wound Motor.png](https://www.expertsmind.com/CMSImages/1562_Series-Wound%20Motor.png)
Figure: Torque-vs-Speed for a Series-Wound Motor
wound motor increases sharply. As load is removed from a series motor, the speed will rise sharply. To these reasons, series-wound motors must have a load linked to avoid damage from high speed conditions.