Title:
POWER CONVERSION DEVICE AND CONTROL METHOD
Document Type and Number:
Japanese Patent JP2022117647
Kind Code:
A
Abstract:
To suppress a voltage fluctuation caused by variation of component parameters, and improve the stability in a multilevel power conversion device using a flying capacitor.SOLUTION: A power conversion device includes a DC capacitor circuit, a first capacitor circuit having a first flying capacitor, and a second capacitor circuit having a second flying capacitor. A control unit increases or reduces a time period related to charging/discharging a first DC capacitor and a second DC capacitor on the basis of a deviation between a voltage detection value of the first flying capacitor and a voltage command value and a deviation between a voltage detection value of the second flying capacitor and the voltage command value, and outputs AC power from a second output terminal that is connected to a connection point between a source terminal of a second switch element and a drain terminal of a third switch in the first capacitor circuit, and a first output terminal that is connected to a connection point between a source terminal of a sixth switch element and a drain terminal of a seventh switch in the second capacitor circuit.SELECTED DRAWING: Figure 11
Inventors:
MURATA AYA
ISHII TAKAAKI
TAWARAGI TAKAYOSHI
ISHII TAKAAKI
TAWARAGI TAKAYOSHI
Application Number:
JP2021014260A
Publication Date:
August 12, 2022
Filing Date:
February 01, 2021
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO
International Classes:
H02M7/487; H02M7/48
Attorney, Agent or Firm:
Hidewa Patent Office