Discover a clear, step‑by‑step approach to assessing iron and friction losses in rotating equipment using retardation curves. This practical guide translates complex equations into test procedures you can apply to real machines.

The book outlines how to build and read retardation curves, determine constants, and calculate losses from controlled speed changes. It covers a specific, multi‑machine setup and explains how to separate iron loss, friction, windage, and copper losses to derive overall efficiency across different loads.

How to prepare retardation runs and collect power input data
Methods to isolate iron losses and determine the constant C
Steps to compute efficiency across various excitations and loads

Ideal for students and professionals working with electrical machines, this edition focuses on practical measurement techniques, careful experimentation, and the interpretation of results to determine machine efficiency in realistic settings.

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