Mechanical degrees: The degree of mechanical or physical rotation one conductor within an alternator.

Electric degrees, the amount or cycle of emf that is induced

one conductor in an alternator

Think about a Two Pole Alternator, where the conductor is rotated around

the field that the emf generated in the conductor is the highest

When the conductor is located at the middle of the pole. Emf is in the middle

The amount of energy induced will be minimal in the case of conductors situated in the middle

of the of the. So when we look at the

diagram of the induced emf against the degree or position of

rotation. One entire rotation of the condutor within the

Field – One full cycle of emf can be generated during the

Conductor (Positive half-cycle at the south pole and negative

halfcycle at the north pole).

Similar to when we think of a four pole alternator to be a single

conductors when they complete one mechanical turn will

Cross the four poles by displaying the graph of induced emf

With two positive half cycles as well as two negative half cycles

This will give us that gives us two cycles total of EMF induced.

That’s why for one Mechanical turn (360 360 degrees) the force is induced.

Emf completes the cycle of two (360 + 2 equals 720 degrees ) in terms of

The sine wave)

Therefore, the relationship between mechanical and electrical degrees

is possible to write as

Elect. Degrees = (N0. of Poles + 2) * Mechanical. Degrees

Source: Elecrical Machinery by P.S.Bimbhra

Hope this will answer your query, and thanks for reading the A2A.