Title:
系統連系インバータ装置
Document Type and Number:
Japanese Patent JP4890247
Kind Code:
B2
Abstract:
A system interconnection inverter interconnected with an AC power system that can protect a switching element for voltage step-up and the like without using an overcurrent protection element and the like such as a fuse, even when a negative voltage is applied to the input side due to misconnection, and that enables normal operation immediately after correcting the misconnection. A system interconnection inverter 2 including a step-up converter 29 and an inverter 14, to interconnect an output of the inverter 14 with the AC power system, wherein the system interconnection inverter 2 comprises: a short-circuit current-interrupting diode 3, whose cathode is connected to an input terminal of a negative bus 35 constituting a pair of DC buses 34 and 35; a semiconductor switch 4 connected to an anode of the short-circuit current-interrupting diode 3; a semiconductor switch drive circuit 5 that drives the semiconductor switch 4; a semiconductor switch-off circuit 7 that turns off the semiconductor switch drive circuit 5 when negative power is applied such that electric current flows from a cathode toward an anode of the input terminal; and a control circuit 21 that controls the semiconductor switch drive circuit 5.
Inventors:
Toba Masahiro
Noriyuki Matsubara
Masanori Kageyama
Koichi Nakabayashi
Noriyuki Matsubara
Masanori Kageyama
Koichi Nakabayashi
Application Number:
JP2006520593A
Publication Date:
March 07, 2012
Filing Date:
March 27, 2006
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02H7/122; H02H11/00; H02J3/38; H02M3/155; H02M7/48
Domestic Patent References:
| JPH1014112A | 1998-01-16 | |||
| JPH0898549A | 1996-04-12 | |||
| JPH06311758A | 1994-11-04 | |||
| JPH06348350A | 1994-12-22 |
Attorney, Agent or Firm:
Hiroaki Sakai