Systems and methods for suppressing resonances in power converters

A system for suppressing resonances in a power converter, said system comprising:

• an alternating current (AC) source;
• an AC load;
• and
• a power converter comprising:
• an input stage configured to receive AC, said input stage coupled to said AC source;
• an output stage configured to output AC, said output stage coupled to said AC load;
• a first direct current (DC) bus coupling said input stage to said output stage;
• a second DC bus coupling said input stage to said output stage;
• a first capacitor leg coupling said first DC bus to said second DC bus;
• a second capacitor leg coupling said first DC bus to said second DC bus, said first DC bus, said second DC bus, said first capacitor leg, and said second capacitor leg form a current loop having an effective inductance;
• and
• at least one resistor configured to suppress a resonance of said power converter, wherein the resonance is based at least in part on the effective inductance of the current loop.

A method of suppressing resonances in a power converter, said method comprising:

• providing a power converter, the power converter comprising an input stage configured to receive alternating current (AC), an output stage configured to output AC, a first direct current (DC) bus coupling the input stage to the output stage, a second DC bus coupling the input stage to the output stage, a first capacitor leg coupling the first DC bus to the second DC bus, and a second capacitor leg coupling the first DC bus to the second DC bus, the first DC bus, the second DC bus, the first capacitor leg, and the second capacitor leg form a current loop having an effective inductance;
• coupling at least one resistor within the power converter;
• and
• suppressing a resonance of the power converter using the at least one resistor, the resonance based at least in part on the effective inductance of the current loop.