Inductances of Distributed Winding - III — Lesson 3

This lesson covers the concept of self and mutual inductance in machines. The lesson also discusses the MMF distribution generated by exciting the stator winding and how to find out the net flux linkage in the stator winding. It further simplifies the relation and proceeds to define direct axis and quadrature axis inductance terms. The lesson concludes with the derivation of the expression for mutual inductance between two phases.

Video Highlights

00:11 - Introduction
02:10 - Simplification of the relation for the flux linkage of the entire winding
06:27 - Definition and expression for inductance terms - direct axis and quadrature axis
10:14 - Discussion and expression for self and leakage inductance
17:39 - Discussion on the concept of mutual inductance between two windings
31:36 - Derivation of the expression for mutual inductance between the two phases

Key Takeaways

- The self-inductance of a distributed winding on the stator can be derived by considering the MMF distribution and the net flux linkage in the stator winding.
- The MMF distribution is generated by exciting the stator winding and is resolved into two directions along the axis of the pole phase and along an axis 900 to that of the pole phase.
- Two inductance terms are defined, Ld and Lq, which represent the inductance of the small air gap and the larger air gap respectively.
- The mutual inductance between two phases can be derived using the spatial separation between the two axes and the position of the rotor axis.