DC EQUIPMENT TERMINOLGY DC GeneratorsIn a DC generator, commutation provides for the conversion of AC to a DC output that isFigure 1 AC to DC Conversion with a Commutatorgenerated in the armature windings. Commutation will be discussed in greater detail insubsequent chapters.SummaryDC equipment terms are summarized below.DC Equipment Terminology SummaryTerminal voltage, as applied to DC generators, is defined as the voltage that canbe measured at the output of the generator.Counter-electromotive force (CEMF) is defined as the induced voltage that actsto counter the applied voltage in a DC motor or a DC generator.Applied voltage is defined as the voltage that is delivered across the load.Commutation is the positioning of the DC generator brushes so that thecommutator segments change brushes at the same time the armature currentchanges direction.In a DC generator, commutation provides for the conversion of AC to a DCoutput that is generated in the armature windings.ES-05 Page 2 Rev. 0
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