Coil Distribution in Rotating Machines — Lesson 5

This lesson covers the concept of coil distribution in electrical machines, specifically focusing on the four-pole machine. It explains how the poles are created by the stator current and how the rotor, which is also an iron, has slots for the conductor. The lesson further elaborates on the concept of mechanical and electrical angles, the generation of EMF, and the B distribution space. It also discusses the concept of coil span and the creation of multiple coils for better voltage waveform and utilization of space. The lesson concludes by explaining the advantages of distributed winding and how voltage loss can be compensated.

Video Highlights

00:38 - Introduction to coil distribution in a four-pole machine
02:40 - Discussion on the generation of EMF
10:12 - Creation of multiple coils for better voltage waveform
27:47 - Advantages of distributed winding

Key Takeaways

- The poles in a four-pole machine are created by the stator current.
- The rotor has slots for the conductor, which is perpendicular to the screen.
- The coil span is 90 degrees mechanical, which electrically means 180 degrees.
- Multiple coils are created for better voltage waveform and better utilization of space.
- Distributed winding is preferred as it allows better utilization of the coil and produces a more sinusoidal B.