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3. Case of a tri phased inverter

Lecture's plan

Introduction

Principle

Single-phase inverter

Tri phased inverter

Alternating voltage amplitude

If we have a tri phased inverter (figure 4), we'll command the arms with a third of a period delay one in relation to the other.

Figure 4

  • the command of the arm B is delayed with in relation to the one of the arm A
  • the command of the arm C is delayed with in relation to the one of the arm A.

The voltages u¢A, u¢B, u¢C can be deduced from the potentials PA, PB, PC by (see structure) :

We therefore have the associated waveforms (figure 5).

Figure 5

from to :
from to :
from to :

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Last update: 2005, September, 30 | Translation: Sergiu Ivanov