Understanding DC Series Motor Functioning — Lesson 1

This lesson covers the functioning and structure of a DC series motor. It explains the role of the armature and the field winding, which has fewer turns, and how they are connected in the motor. The lesson also highlights the difference between a series motor and a shunt machine, where the field winding is connected across. It further explains that in a DC series motor, the armature and field current are the same, and the machine is supplied with a DC voltage.

Video Highlights

01:54 - Explanation of the basic equations of the DC series motor
08:50 - Discussion on the effect of load torque on the current and speed of the DC series motor
20:52 - Discussion on the speed control of a DC series motor
27:34 - Explanation of the dangers of a loose field circuit connection in a shunt motor
34:19 - Discussion on the importance of ensuring opposing load torque in a DC series motor

Key Takeaways

• A DC series motor has an armature and a field winding with fewer turns.
• The field winding is connected in series with the armature, unlike in a shunt machine.
• In a DC series motor, the armature and field current are the same.
• The machine is supplied with a DC voltage.