Title:
NON-ISOLATED POWER CONVERSION DEVICE AND NON-ISOLATED POWER CONVERSION SYSTEM
Document Type and Number:
Japanese Patent JP2017069996
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive non-isolated power conversion device capable of effectively suppressing a leakage current even in a system power source of any ground system such as a three-phase four-wire type O(N) phase ground system.SOLUTION: A power conversion device comprises: a three-phase inverter 3; a plurality of input-side capacitors connected in series between DC input terminals of the three-phase inverter; an LC filter 4 consisting of a reactor and capacitors connected to AC output terminals of the three-phase inverter; and a control part 30 for controlling the three-phase inverter. A node between the input-side capacitors and a node of some of a plurality of capacitors constituting the LC filter are connected as a virtual ground point so as to match with a ground phase of a system power source at an interconnection destination. A common mode filter is further connected on a post-stage of the LC filter, and the control part 30 controls the three-phase inverter so as to match with the ground phase of the system power source at the interconnection destination with the virtual ground point defined as a reference.SELECTED DRAWING: Figure 1
Inventors:
SUGIMOTO HIDEHIKO
OTA JUNJI
YOSHIDA MORITO
OTA JUNJI
YOSHIDA MORITO
Application Number:
JP2015189216A
Publication Date:
April 06, 2017
Filing Date:
September 28, 2015
Export Citation:
Assignee:
TABUCHI DENKI KK
International Classes:
H02M7/48
Attorney, Agent or Firm:
Kaoru Hashimoto