Magnetic Circuits with Multiple Windings and Permanent Magnets — Lesson 3

This lesson covers the in-depth analysis of magnetic circuits with multiple winding excitations and permanent magnets. It begins with a discussion on magnetic circuits with AC excitation, followed by an explanation of magnetic circuits with multiple windings. The lesson then delves into the concept of magnetic circuits with permanent magnets, explaining the principles, equations, and analysis involved. It also discusses the representation of reluctance paths in terms of capacitances and the concept of energy storage. The lesson concludes with the analysis of magnetic circuits with multiple windings and permanent magnets.

Video Highlights

00:09 - Introduction
00:21 - Explanation of magnetic circuit with AC excitation
01:34 - Explanation of magnetic circuits with multiple windings
07:40 - Drawing equivalent circuit
18:41 - Discussion on magnetic circuits with permanent magnets
33:14 - Representation of reluctance paths in terms of capacitances

Key Takeaways

- Magnetic circuits with AC excitation involve sinusoidal quantities displaced by 90 degrees.
- In magnetic circuits with multiple windings, the flux linking with respect to each coil consists of different components.
- Magnetic circuits with permanent magnets involve wider B H loops and require a specific volume to establish the required flux density at the air gap.
- The analysis of magnetic circuits with multiple windings and permanent magnets is similar to the network theory concept.