MMF Drops and Magnetizing Current — Lesson 3

This lesson covers the concept of magnetizing current equations in relation to the MMF drops at various parts of a machine. It explains how to calculate the MMF drops at the air gap, stator teeth, rotor teeth, stator core, and rotor core. The lesson also discusses how to calculate the magnetizing current required to establish the air gap flux density. It further explains the use of the Simpson rule to calculate the average flux intensity of a core. The lesson also provides an understanding of the reluctance equation and MMF drop with respect to the air gap.

Video Highlights

00:00 - Introduction
00:26 - Explanation of the fundamental stator MMF
01:26 - Discussion on calculating MMF based on different drops
03:12 - Explanation of the reluctance equation and MMF drop with respect to the air gap
8:34 - Calculation of MMF drop and reluctance at the tooth
23:28 - Calculation of MMF drop and reluctance at the core portion
37:59 - Calculation of the magnetizing current

Key Takeaways

- The magnetizing current equations are crucial in understanding the MMF drops at various parts of a machine.
- The MMF drops can be calculated at the air gap, stator teeth, rotor teeth, stator core, and rotor core.
- The Simpson rule is useful in calculating the average flux intensity of a core.
- The reluctance equation and MMF drop with respect to the air gap provide a comprehensive understanding of the magnetizing current.
- The calculation of the magnetizing current is based on the MMF drops at various parts of the machine.