7 rotating dc machines - montana state university 250_22a.pdf · 2015-12-17 · 11/28/2011 1 eele...
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![Page 1: 7 Rotating DC Machines - Montana State University 250_22a.pdf · 2015-12-17 · 11/28/2011 1 EELE 250/Fall 2011 Montana State University Sarah Lukes Basic principles of rotating dc](https://reader034.vdocuments.site/reader034/viewer/2022042418/5f349a8340fa8310597c8b17/html5/thumbnails/1.jpg)
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Sarah LukesEELE 250/Fall 2011 Montana State University
Basic principles of rotating dc machines are the same as those of the linear dc machine
A rotating dc machine can be modeled by an equivalent circuit
Magnetization curve
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Only a few conductors commutated (switched) at a time, so voltage fluctuations are less pronounced.
Field Circuit
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Resistance of armature windings and brush
Induced armature voltageor back EMF:
Torque:
Does not include losses
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Developed power:
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A rotating dc machine can be modeled by an equivalent circuitequivalent circuit
Magnetization curve provides relationship between the armature voltage EA and the field current IF
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