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CONVERTER SUBMODULE WITH SHORT-CIRCUIT DEVICE AND POWER CONVERTER HAVING SAME

  • US 20160365787A1
  • Filed: 06/15/2016
  • Published: 12/15/2016
  • Est. Priority Date: 06/15/2015
  • Status: Active Grant
First Claim
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1. A submodule for a power converter, comprising:

  • a bridge circuit comprising at least one power semiconductor branch which extends between a first and a second DC voltage node and having a controllable power semiconductor switch arranged therein, with a freewheeling diode connected in anti-parallel thereto;

    a capacitor connected in parallel to the bridge circuit between the first and second DC voltage nodes; and

    a short circuit device comprising at least one selected of the freewheeling diodes anti-parallel to the power semiconductor switches of the bridge circuit, wherein the at least one selected freewheeling diode is manufactured in press pack design and rated such that, when a fault occurs in the submodule, the at least one selected freewheeling diode breaks down due to fault conditions and provides a low-impedance short-circuit path between a first and a second AC voltage connection of the submodule.

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