Electric power conversion device
AssigneeMitsubishi Electric Corporation
InventorTetsunori KINOSHITA
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Abstract
Provided are a main converter that is connected to an inductor on one end side and in which a DC positive electrode, a DC negative electrode, and a neutral point are set on the other end side, a capacitor circuit having a positive electrode terminal, a negative electrode terminal, and a neutral point that are to be connected to a DC side, a sub-converter including a capacitor and a plurality of elements, being connected between the neutral point of the capacitor circuit and the neutral point of the main converter, and configured such that a capacitor voltage changes in accordance with a combination of open/close settings on the elements, and a controller to control operations of the main converter and the sub-converter.
Claims9
-8. (canceled)
A power conversion device comprising:
- an inductor provided for each of phases on an AC side;
- a main converter that is connected to the inductor on one end side and in which a DC positive electrode, a DC negative electrode, and a neutral point are set on the other end side;
- a capacitor circuit having a positive electrode terminal, a negative electrode terminal, and a neutral point that are to be connected to a DC side;
- a sub-converter including a capacitor and a plurality of semiconductor switching elements, being connected between the neutral point of the capacitor circuit and the neutral point of the main converter, and configured such that a capacitor voltage changes in accordance with a combination of open/close settings on the plurality of semiconductor switching elements;
- and
- a controller to control operations of the main converter and the sub-converter.
Dependencies are inferred from the claim text.