What is excitation voltage and current?

An excitation voltage or current is the amount of electric energy ( D.C ) feed into the field winding of an alternator rotor to produce magnetic flux / field. The output voltage of an alternator depends upon the magnetic field and so the excitation voltage.

How is excitation voltage generated in a generator?

As the speed of the engine the generator increases, the voltage produced also increases. The excitation system monitors the generator output and regulates the magnetic field to maintain the desired voltage. As the load on the generator is increased, an increase in current flow causes the voltage to drop.

What is exciter current?

A transformer exciting current is the current or amperes required to energize the core. The excitation current is made up of two components. The real component in the form of losses that are commonly referred to as no-load losses. The second form is reactive power measured in KVAR.

How is voltage generated calculated?

Generated voltage = emf = Velocity x B-field x Length the generated voltage is V = x 10^ V. the generated voltage is V = x 10^ V.

How do you measure exciting current?

the exciting current measurement is performed by applying an aC (60hz) Voltage (typically at 10kV) across a primary winding of the transformer while simultaneously measuring the current flowing through the same primary winding (while the secondary and ter- tiary winding(s) of the transformer are open-circuited).

What is the excitation current of a circuit?

The excitation current is the current that generates the terminal voltage. Rating of excitation current controls the terminal voltage level. Thus, to keep the terminal voltage constant or fixed, the excitation current is to be variable and adjustable. So, excitation current has to be adjustable.

What is the excitation voltage of alternator?

An excitation voltage or current is the amount of electric energy ( D.C ) feed into the field winding of an alternator rotor to produce magnetic flux / field. The output voltage of an alternator depends upon the magnetic field and so the excitation voltage.

Why do we use excitation voltage below the maximum excitation voltage?

Since the heat to be dissipated increases quadratically with the excitation voltage, an excitation voltage below the maximum excitation voltage very quickly results in a significant minimization of the measurement error.

How is the excitation voltage of a rotary motor controlled?

The direct current produced by the exciter upon shaft rotation is then feed to the rotor windings through brushes and slip rings. This excitation voltage is then controlled by varying field current of main exciter through a pilot exciter.