Understanding DC Machine Armature Winding-3 — Lesson 8

This lesson covers the complex concept of armature winding in Direct Current (DC) machines. It explains how the spatial distribution of polarities of induced voltage across each coil is converted to DC. The lesson also discusses the calculation of coil span and the number of slots per pole. It further elaborates on the connection of coils in series and the absence of circulating current. The lesson also introduces the concept of commutator segments and their role in the armature winding of a DC machine. It provides a detailed explanation of how these segments are connected and insulated. The lesson concludes with a discussion on the placement of carbon brushes and the generation of DC voltage.

Video Highlights

01:48 - Calculation of coil span and number of slots per pole
11:33 - Introduction to the concept of commutator segments
21:17 - Discussion on how coils are connected to commutator segments
29:29 - Discussion on the complexity of DC machine construction
30:14 - Explanation of how the placement of brushes affects voltage

Key Takeaways

• Armature winding in DC machines is more complex than in AC machines.
• The spatial distribution of polarities of induced voltage across each coil is converted to DC.
• Coils are connected in series and there is no circulating current.
• Commutator segments play a crucial role in the armature winding of a DC machine.
• Each commutator segment is insulated from each other and from the shaft of the machine.
• The placement of carbon brushes is crucial for the generation of DC voltage.