Distribution Factor in Coils — Lesson 1

This lesson covers the concept of coil distribution in electrical machines. It explains how coils are distributed to use the surface of the machines more effectively. The lesson discusses the displacement of coils by an angle, the resultant voltage, and the concept of electrical and mechanical angles. It also introduces the idea of multipolar machines and the representation of these machines as two-pole machines. The lesson further explains the distribution factor, which is the ratio of the resultant voltage when the coils are distributed to when they are concentrated. An example of a machine with three coils is used to illustrate these concepts.

Video Highlights

01:38 - Explanation of coil displacement and resultant voltage
10:33 - Explanation of distribution factor
17:27 - Calculation of resultant voltage when coils are distributed
25:37 - Calculation of resultant voltage when coils are concentrated

Key Takeaways

- Coils in electrical machines are distributed to use the surface of the machines more effectively.
- The displacement of coils by an angle results in a change in the resultant voltage.
- Electrical machines can be multipolar, and these are often represented as two-pole machines for simplicity.
- The distribution factor is the ratio of the resultant voltage when the coils are distributed to when they are concentrated. This factor is important in understanding the efficiency of coil distribution.