Singly Excited Linear Motion System — Lesson 1

This lesson covers the singly excited linear system and its behaviour. An illustrative example of a coil bound around a hollow length with an iron bar is used to demonstrate these concepts. The lesson concludes with a detailed explanation of how to estimate inductances and the behavior of the entire system using mathematical equations.

Video Highlights

00:16 - Explanation of different forms of inductances: leakage inductance, magnetizing inductance, and mutual inductance
02:09 - Discussion on the concept of magnetic circuit and its importance in understanding the behavior of electrical machines
03:51 - Numerical example to understand the effect of inductance and the introduction of an air gap in the iron path
05:26 - Explanation of how to calculate the value of B (flux density) within the iron region
08:59 - Discussion on the effect of introducing an air gap in the iron path on the value of B and the inductance
18:31 - Introduction to a singly excited linear system and its behavior
23:28 - Derivation of the equations to describe the behavior of the singly excited linear system
32:32 - Explanation of how the input power is consumed in the system
40:32 - Derivation of the expression for the force
45:23 - Overview of how to estimate the behavior of the entire system using the derived equations

Key Takeaways

- Inductances in electrical machines can be divided into leakage inductance, magnetizing inductance, and mutual inductance.
- The introduction of an air gap in the iron path significantly reduces the flux density and inductance.
- The behavior of the entire system can be estimated using mathematical equations, considering both the electrical and mechanical aspects.
- The mechanical output depends upon the rate of change of inductance, making inductance a crucial factor in electrical machines.