Exercise 01

An hexapolar synchronous machine has the e.m.f. across phase 1:

e₁ = Ф_m ω sin(ωt)

1. Give the e.m.f. at the terminals of the other phases.

Exercise 02

A three-phase hexapolar synchronous machine rotates at a speed of 1000 rpm. Find its electric angular speed?

Exercise 03

In a three-phase four-pole synchronous machine, two active wires are separated by a real mechanical angle of π/2 rad. What electrical angle separates them?

Exercice 04

In a power plant, a multipole synchronous machine is driven at a rotational speed of 1000 rpm providing a frequency of 50 Hz.

1. Find the number of pole pairs p of this machine.

2. Find the mechanical angle existing between two successive coils.