generator dc (separately excited)

this is the picture when i practicum in electric machine laboratory room and this is a set of separate amplifier dc generator. the working principle of seperate amplifier dc generator is as follows

work principle

The working principle of a DC generator is based on a right-hand rule. A pair of north-south permanent magnets produces a magnetic field line Ф, the wire on top of the right hand palm is pierced by a magnetic Ф line. If the wire is moved toward the thumb, then in the wire is produced an electric current I in the direction of the four fingers. What if the north-south position of a permanent magnet is reversed? Where is the direction of the resulting induced electric current?

A simple experiment can be done using a pair of permanent U-shaped magnets, a wire hung on both sides of the end, on the end of a wire paired with a Voltmeter. The wire rod is moved towards the arrow, on the wire generated emf induction with the measured voltage on the Voltmeter.

The magnitude of the raised induced emf

ui = B.L.v.z Volt

ui = Induced voltage on the wire, V

B = Magnetic field density, Tesla

L = effective wire length, meters

v = Speed ​​of motion, m / sec

z = Number of turns of wire

thanks for this application eSteem @good-karma ✊👍
and friends
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