Power conversion device
AssigneeHitachi, Ltd.
InventorsShoya Akazawa, Hiroyuki Ozawa
Life of this patent
Estimating the term…
Abstract
In order to reduce noise current leaking out from a frame to which semiconductor devices constituting a three-level power conversion circuit are attached to the outside of a power conversion device, the frame to which the semiconductor devices constituting the three-level power conversion circuit with which the power conversion device is equipped are attached is configured to be electrically connected to a neutral point of the three-level power conversion circuit. The noise current leaking out from the frame is thereby drawn back to the neutral point of the three-level power conversion circuit to suppress the flowing out of the noise current to the outside of the power conversion device and reduce the noise current.
Claims9
A power converter comprising:
- a three-level power conversion circuit, wherein
- a frame to which a semiconductor device constituting the three-level power conversion circuit is attached is electrically connected to a neutral point of the three-level power conversion circuit;
- wherein
- a noise absorbing core is provided in a path of a wiring that electrically connects the frame to the neutral point of the three-level power conversion circuit.
A power converter comprising:
- a three-level power conversion circuit, wherein
- a frame to which a semiconductor device constituting the three-level power conversion circuit is attached is electrically connected to a neutral point of the three-level power conversion circuit, wherein
- a noise absorbing capacitor is provided in a path of a wiring that electrically connects the frame to the neutral point of the three-level power conversion circuit.
Dependencies are inferred from the claim text.