SYSTEMS AND METHODS FOR SUPPRESSING RESONANCES IN POWER CONVERTERS

摘要

Systems and methods for suppressing resonances in power converters are provided. A power converter (100) includes an input stage (101) configured to receive alternating current (AC), an output stage (102) configured to output alternating current (AC), a first direct current (DC) bus (106) coupling the input stage (101) to the output stage (102), a second DC bus (108) coupling the input stage (101) to the output stage (102), a first capacitor leg (110) coupling the first DC bus (106) to the second DC bus (108) and a second capacitor leg (112) coupling the first DC bus (106) to the second DC bus (108). The first DC bus (106), the second DC bus (108), the first capacitor leg (110), and the second capacitor leg (112) form a current loop (130) having an effective inductance, and at least one resistor (140,142) configured to suppress a resonance of the power converter (100), wherein the resonance is based at least in part on the effective inductance of the current loop.

主权项

1. A 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 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.