Induced Voltage in a Coil — Lesson 1

This lesson covers the concept of magnetic field distribution in electrical machines. It explains how the air gap field distribution, which is rectangular in nature, plays a crucial role in generating AC voltage. The lesson emphasizes the importance of sinusoidal magnetic field distribution for AC voltage generation. It also demonstrates how a conductor generates EMF when it moves under a field. The lesson further explains how the voltage polarity changes as the conductor moves under different poles and how the absence of flux density results in zero induced voltage. The lesson concludes with a discussion on how the EMF generated in a single conductor follows the same pattern as that of B.

Video Highlights

00:15 - Introduction to magnetic field distribution in electrical machines
04:32 - Explanation of EMF pattern in a single conductor
08:33 - Discussion on electrical and mechanical degree
19:40 - Understanding induced sinusoidal voltage in a coil

Key Takeaways

- Magnetic field distribution is crucial in electrical machines, particularly in generating AC voltage.
- The air gap field distribution, which is rectangular, needs to be sinusoidal for AC voltage generation.
- A conductor generates EMF when it moves under a field, and the voltage polarity changes as it moves under different poles.
- In the absence of flux density, the induced voltage is zero.
- The EMF generated in a single conductor follows the same pattern as that of B.