Understanding Armature Winding in DC Machines — Lesson 3

This lesson covers the concept of armature winding in DC machines, focusing on lap winding and wave winding. It explains the importance of coil span and commutator pitch in determining the induced voltage in a coil. The lesson also discusses the difference between lap and wave winding, which lies in how the ends of the coils are terminated on the commutator segment. For instance, in lap winding, the two ends of a coil are terminated in consecutive commutator segments, while in wave winding, they are terminated two pole pitch apart. The lesson further illustrates these concepts with a detailed explanation of the winding process and the use of diagrams.

Video Highlights

03:03 - Explanation of the concept of coil span
09:01 - Discussion on the importance of coil span and commutator pitch in DC machine windings
21:24 - Discussion on the concept of wave winding
30:31 - Discussion on the process of wave winding

Key Takeaways

• Armature winding in DC machines is crucial for determining the induced voltage in a coil.
• In lap winding, the two ends of a coil are terminated in consecutive commutator segments, while in wave winding, they are terminated two pole pitch apart.
• The coil span, which is the number of slots per pole, and the commutator pitch, which is the difference in the number of the commutator segment, are important factors in the winding process.
• Understanding the winding process requires a clear grasp of these concepts and the ability to visualize the process through diagrams.