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What excitation voltage do you talk about? Is it about generator?
For example, in DC generator, the concept of excitation voltage is like this:
"when a dc voltage is applied to the field windings of a dc generator, current flows through the windings and sets up a steady magnetic field."
The voltage is called the excitation voltage --> the voltage that excites magnetic field.
"This excitation voltage can be produced by the generator itself or it can be supplied by an outside source, such as a battery. A generator that supplies its own field excitation is called a SELF-EXCITED GENERATOR. Self-excitation is possible only if the field pole pieces have retained a slight amount of permanent magnetism, called RESIDUAL MAGNETISM. When the generator starts rotating, the weak residual magnetism causes a small voltage to be generated in the armature. This small voltage applied to the field coils causes a small field current. Although small, this field current strengthens the magnetic field and allows the armature to generate a higher voltage. The higher voltage increases the field strength, and so on. This process continues until the output voltage reaches the rated output of the generator."
Reference: **broken link removed**
Hope it help you Or if anyone has better explanations, please enlighten me. Thank you.
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Or if anyone has better explanations, please enlighten me. Thank you.