7.3 Classical Control: The Venturini Method
The sinusoidal voltages of the three-phase power supply can be expressed as
The desired voltages generated at the load, which are the low-frequency components, can be expressed as
7.16 
Neglecting the presence of the input filter, the relation between the amplitude of the input voltage and the amplitude of the output voltage is
7.17 
where q is the voltage gain.
Considering that the typical load of a MC will have low-pass characteristics, the output current is
7.18 
To operate with unity power factor, the switches must be controlled to generate the following input currents (the fundamental components):
7.19 
The MC does not store energy and, for this reason, the active power at the input (Pi) and at the output (Po) must be equal at all times, as expressed by the equation
With all these fundamental definitions, the task of the modulator ...
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