Gate drive power supply for multilevel converter
AssigneeOtis Elevator Company
InventorsMarinko Kovacic, Shashank Krishnamurthy
Life of this patent
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Abstract
A neutral point clamped, multilevel level converter including a DC voltage link having a positive rail and a negative rail; a phase leg coupled to an AC node, the phase leg having a first switch and a second switch in series between the negative rail and the AC node, the phase leg having a third switch and a fourth switch in series between the positive rail and the AC node; and a gate drive power supply having a charge pump section, the charge pump section generating a first gate drive voltage for the first switch and a second gate drive voltage for the second switch.
Claims13
A neutral point clamped, multilevel level converter, comprising:
- a DC voltage link having a positive rail and a negative rail;
- a phase leg coupled to an AC node, the phase leg having a first switch and a second switch in series between the negative rail and the AC node, the phase leg having a third switch and a fourth switch in series between the positive rail and the AC node;
- and
- a gate drive power supply having a charge pump section, the charge pump section generating a first gate drive voltage for the first switch and a second gate drive voltage for the second switch.
Dependencies are inferred from the claim text.