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Power conversion device

  • US 9,906,158 B2
  • Filed: 06/17/2015
  • Issued: 02/27/2018
  • Est. Priority Date: 07/29/2014
  • Status: Active Grant
First Claim
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1. A power conversion device comprising:

  • a capacitor module that smooths a DC current from a DC power source;

    a power module that converts the DC current into an AC current based on a drive signal from a drive circuit;

    a circuit board that extends up to above the power module and includes a ground layer in a control circuit mounting region of the circuit board, wherein the control circuit mounting region faces the power module;

    a noise shielding plate that extends to the control circuit mounting region and includes an opening for wiring that connects together the power module and the drive circuit, wherein the noise shield plate shields noise from the power module; and

    a metal housing in which the capacitor module and the power module are contained side by side, the circuit board is contained above the capacitor module, and the noise shielding plate is contained at a position which faces the control circuit mounting region between the circuit board and the capacitor module,wherein the noise shielding plate has a plurality of connection parts that are electrically connected to the metal housing,a first end part on a power module side of the noise shielding plate is provided on the power module more than a second end part on the power module side of the ground layer and a particular connection part from the plurality of connection parts that is closest to the first end part among the plurality of connection parts is provided on the power module more than the second end part, in planar view viewed from above a containing part of the metal housing, andan edge on a capacitor modules side of the opening is the first end part.

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