Back-emf
Positioning and objective
The aim of the test “Characterization - Open circuit – Motor & Generator - Back-EMF” is to characterize the behavior of the machine when running in open circuit state.
The analysis of back-EMF characteristics is a first step to evaluate the relevance of
the machine design regarding parameters such as: topology, winding architecture,
composition of coils and choice of materials.
Warning: When a delta winding connection is considered, the computation
doesn’t consider circulation currents. That can lead to a different result than
what expected in transient computation.
In such cases it is recommended to perform a transient computation in Altair Flux environment. The application “Export to Altair Flux” allows exporting this kind of model with the corresponding scenario ready to be solved.
The following table helps to classify the test “Open circuit – Back-EMF”.
| Family | Characterization |
|---|---|
| Package | Open circuit |
| Convention | Motor & Generator |
| Test | Back-EMF |