Empirical formulas for calculating the effective length of core — Lesson 2

This lesson covers the concept of effective length in electromagnetic devices, focusing on the iron core's actual and effective length. It discusses how to calculate the effective length of the stator and rotor core, especially when the machine core has different ducts for cooling purposes. The lesson introduces empirical formulas to calculate the effective length, which is a key parameter in solving sizing equations and determining flux densities, MMFs, and performance parameters. It also presents different scenarios, such as when the stator and rotor have the same length, when their lengths are slightly different, and when there are ducts on the stator or rotor side.

Video Highlights

00:00 - Introduction
01:22 - Discussion on empirical formulas for calculating effective length
02:31 - Presentation of different scenarios for calculating effective length
08:54 - Conclusion and summary of the lesson

Key Takeaways

- The effective length of an electromagnetic device's core is a crucial parameter in solving sizing equations and determining various performance parameters.
- Empirical formulas, based on literature and manufacturers' experiences, are used to calculate the effective length.
- The effective length calculation varies depending on the scenario, such as whether the stator and rotor have the same length, their lengths are slightly different, or there are ducts on the stator or rotor side.