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DUAL-ELEMENT POWER MODULE AND THREE-LEVEL POWER CONVERTER USING THE SAME

  • US 20150222201A1
  • Filed: 08/10/2012
  • Published: 08/06/2015
  • Est. Priority Date: 08/10/2012
  • Status: Abandoned Application
First Claim
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1. A three-level power converter comprising a power-conversion circuit unit for one phase that selects any of potentials of a higher-side DC terminal, an intermediate-potential terminal, and a lower-side DC terminal, and that outputs the selected potential to an AC terminal, where the power-conversion circuit unit includes a first dual-element power module that includes an outer switching element on a higher potential side and a clamp element on the higher potential side, a second dual-element power module that includes an inner switching element on the higher potential side and an inner switching element on a lower potential side, and a third dual-element power module that includes an outer switching element on the lower potential side and a clamp element on the lower potential side, whereinthe first to third dual-element power modules are dual-element triple-terminal power modules with a same configuration, each of which includes a first electrode that is connected to a higher-side potential portion of one of elements, a second electrode that is connected to a connection portion between a lower-side potential portion of the one of the elements and a higher-side potential portion of the other element, and a third electrode that is connected to a lower-side potential portion of the other element, andthe first electrode in the first dual-element power module is connected to the higher-side DC terminal, the second electrode in the first dual-element power module and the first electrode in the second dual-element power module are connected, the third electrode in the first dual-element power module is connected to the intermediate-potential terminal, the first electrode in the third dual-element power module is connected to the intermediate-potential terminal, the second electrode in the second dual-element power module is connected to the AC terminal, the third electrode in the second dual-element power module and the second electrode in the third dual-element power module are connected, and the third electrode in the third dual-element power module is connected to the lower-side DC terminal.

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