Patent ID: 11909302
Assignee: GE INFRASTRUCTURE TECHNOLOGY LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The system of claim 15, wherein operating the plurality of switching devices in the plurality of operating states such that current simultaneously flows through the at least two parallel recovery paths of the plurality of switching devices during operation of the power converter further comprises:
transitioning from the third operating state to the fifth operating state by:
turning off the second IGBT switch, thereby allowing a first parasitic inductance between the fifth diode and the second IGBT switch to discharge energy without forcing excessive voltage across the second IGBT switch; and
subsequently turning off the sixth IGBT switch, thereby allowing energy in a second parasitic inductance between the sixth IGBT switch and the third antiparallel diode to remain as-is such that turning off the sixth IGBT does not cause a voltage overshoot across the sixth IGBT; and,

transitioning from the fourth operating state to the second operating state by:
turning off the third IGBT switch, thereby allowing the second parasitic inductance to discharge energy without forcing excessive voltage across the third IGBT switch; and
subsequently turning off the fifth IGBT switch, thereby allowing energy in the first parasitic inductance to remain as-is such that turning off the fifth IGBT does not cause a voltage overshoot across the fifth IGBT.