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2. Sine wave modulation

In a steady state regime we want to supply the load with voltages that form a balanced tri phased system of sinusoidal voltages:

In the case of the sine wave modulation we consider:

As we must have

the voltages must have a peak amplitude U0 so that

We can write

which leads to:

The coefficient r is called the amplitude modulation factor

If we normalize the amplitude of the reference voltages, that means if , we'll obtain:

 

Figure 2

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