Improved power converter with reduced common mode voltage and corresponding method

Improved power converter with reduced common mode voltage and corresponding method

  • CN 101,030,735 B
  • Filed: 02/28/2007
  • Issued: 07/17/2013
  • Est. Priority Date: 03/01/2006
  • Status: Active Grant
First Claim
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1. three phase mains converter comprises:

  • The rectifier part, first, second, and third input in described rectifier part receives first, second, and third ac input voltage respectively;

    Inverter section has at least one the input node that is coupled to described rectifier at least one output node partly, and wherein said inverter section generates first, second, and third output AC voltage at its first, second, and third output respectively;

    AndAt least one additional links, it is not coupled to described first, second, and third input via the load of supply convertor with described first, second, and third output, and therefore the grounded neutral that is associated with described first, second, and third ac input voltage is connected with described first, second, and third output thus;

    It is one of following that each of wherein said at least one additional links comprises;

    (a) be coupling in first, second, and third capacitor between described first, second, and third output and first intermediate node respectively, be coupling in first, second, and third resistance between described first, second, and third input and second intermediate node respectively, and the 4th resistance of described first and second intermediate nodes that are coupled;

    And(b) be coupling in first, second, and third resistance between described first, second, and third output and first intermediate node respectively, be coupling in first, second, and third capacitor between described first, second, and third input and second intermediate node respectively, and the 4th resistance of described first and second intermediate nodes that are coupledWherein said three phase mains converter also comprises output inductor device and at least one common mode filtering element, described at least one common mode filtering element forms the part of described inverter section, wherein said common mode filtering element is connected between the output of described output inductor device and described inverter section, and is configured at least a portion of filtering common-mode voltage.

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