Inductance in Salient Pole Machine - IV — Lesson 5

This lesson covers the concept of deriving inductances in electrical machines, focusing on a simple machine with two cylindrical stator and salient pole rotor coils. It explains how to determine the mutual inductance between the two stator and the rotor coil, and how the flux density distribution inside the machine affects this. The lesson also discusses the process of assembling a machine and the role of different components like the stator, rotor, and field winding. It further elaborates on the concept of flux density waveform and its approximation. The lesson concludes with the calculation of mutual inductance and self-inductance of the rotor and stator windings.

Video Highlights

00:11 - Introduction
01:28 - Explanation of the flux density waveform and demonstration of the machine assembly through 3D animation
07:10 - Discussion on determining the mutual inductance of the two stator coils
10:57 - Discussion on the flux density waveform around the air gap of the two stator coils
21:30 - Explanation of the flux linkage in the stator
39:08 - Discussion on the self-inductance of the rotor coil
45:55 - Overview of the self-inductance of the stator winding

Key Takeaways

- The mutual inductance between the stator and the rotor coil in an electrical machine can be determined by understanding the flux density distribution inside the machine.
- The assembly of a machine involves components like the stator, rotor, and field winding.
- The flux density waveform, which travels along with the rotor, can be approximated as a square wave.
- The mutual inductance and self-inductance of the rotor and stator can be calculated using specific formulas, taking into account the number of turns, the flux, and the current in the rotor.