[W-MO-114] Efficiency Map Measurement Comparisons

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Overview

Traction motors are required to be of a high efficiency in a wide range of operating regions, ranging from low-speed and low-load operation to high-speed rotation. It is because PM motors possess a high maximum efficiency that there is a need to improve efficiency by an order of 1%, and it is for this reason that high-accuracy simulations are required within a wide range of operating regions.
This document compares an efficiency map obtained with simulations with an efficiency map consisting of actual measurements, achieving an error of 1% or less for entire regions. The contribution of loss factors to these efficiency maps is also evaluated, and for the model featured in this document, there exists a large amount of influence from both the harmonic iron loss that occurs as a result of the PWM carrier, as well as AC copper loss.

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