Three phase rectifier circuit with virtual neutral

A rectifier circuit for powering three power conversion modules using a three phase AC input without a neutral connection, said rectifier circuit comprising:

• a first bridge rectifier that is connected to a first phase of said three phase AC input and that produces a first rectified waveform;
• a second bridge rectifier that is connected to a second phase of said three phase AC input and that produces a second rectified waveform;
• a third bridge rectifier that is connected to a third phase of said three phase AC input and that produces a third rectified waveform;
• a first inductor having one end that is connected to said first bridge rectifier;
• a second inductor having one end that is connected to said second bridge rectifier;
• a third inductor having one end that is connected to said third bridge rectifier, wherein opposite ends of said first, second and third inductors are connected to form a virtual neutral;
• a first capacitor that is connected across said first bridge rectifier that filters said first rectified waveform and that creates a first DC rail voltage;
• a second capacitor that is connected across said second bridge rectifier that filters said second rectified waveform and that creates a second DC rail voltage;
• and
• a third capacitor that is connected across said third bridge rectifier that filters said third rectified waveform and that creates a third DC rail voltage.

A rectifier circuit for powering three power conversion modules using a three phase AC input without a neutral connection, said rectifier circuit comprising:

• a first bridge rectifier that is connected to a first phase of said three phase AC input, that has a first DC output that produces a first rectified waveform;
• a second bridge rectifier that is connected to a second phase of said three phase AC input, that has a second DC output that produces a second rectified waveform;
• a third bridge rectifier that is connected to a third phase of said three phase AC input, that has a third DC output that produces a third rectified waveform;
• a connection between said first, second, and third bridge rectifiers that forms a virtual neutral;
• and
• a first protection circuit that is connected to at least one of said first, second and third DC outputs that prevents overvoltage when at least one of said first, second and third DC outputs is shorted.

A radio frequency (RF) power amplifier circuit comprising:

• a virtual neutral circuit that forms a virtual neutral and that receives a three-phase AC input voltage;
• a first RF power amplifier that communicates with said virtual neutral circuit and that generates a first RF output;
• a second RF power amplifier that communicates with said virtual neutral circuit and that generates a second RF output;
• a third RF power amplifier that communicates with said virtual neutral circuit and that generates a third RF output;
• and
• a combiner that combines said first, second and third RF outputs into a combined RF output.