公开(公告)号：HK1151635A1

公开(公告)日：2012-02-03

申请号：HK11105560

申请日：2011-06-02

Applicant: ABB TECHNOLOGY AG

Inventor： DOEFNAES LARS ,  HARNEFORS LENNART ,  PETTERSSON ANDERS J ,  SILJESTROEM ROLAND ,  ASPLUND GUNNAR

IPC: H02M20060101

Abstract: A device for converting a DC voltage into an AC voltage and vice versa comprises a control system to control the voltage conversion and at least one phase leg (1) with a first (Uvp1) voltage source connected in series between a first DC terminal (4) and a first AC terminal (6) and with a second (Uvn1) voltage source connected in series between the first AC terminal (6) and a second DC terminal (5). Each of the voltage sources comprises at least a first and a second submodule (15) in series-connection, where each submodule (15) comprises at least two power electronic switches (16) connected in parallel with at least one capacitor (17). The control system comprises a central control unit (19) and at least two subunits (20), where the central control unit (19) transmits to each subunit (20) a reference AC voltage (ua_ref) and a switching carrier signal (s_sw) and where each subunit (20) controls the switching of the power electronic switches (16) of one of the submodules (15) according to a PWM pattern so that each time the switching carrier signal (s_sw) crosses the reference AC voltage (ua_ref) either the voltage across the capacitor (17) or a zero voltage are applied to output terminals (26, 27) of the corresponding submodule (15).

公开(公告)号：CA2709699A1

公开(公告)日：2009-07-16

申请号：CA2709699

申请日：2008-12-23

Applicant: ABB TECHNOLOGY AG

Inventor： DOEFNAES LARS ,  HARNEFORS LENNART ,  PETTERSSON ANDERS J ,  SILJESTROEM ROLAND ,  ASPLUND GUNNAR

IPC: H02M7/483

Abstract: A device for converting a DC voltage into an AC voltage and vice versa comprises a control system to control the voltage conversion and at least one phase leg (1 ) with a first (Uvp1 ) voltage source connected in series between a first DC terminal (4) and a first AC terminal (6) and with a second (Uvn1 ) voltage source connected in series between the first AC terminal (6) and a second DC terminal (5). Each of the voltage sources comprises at least a first and a second submodule (15) in series-connection, where each submodule (15) comprises at least two power electronic switches (16) connected in parallel with at least one capacitor (17). The control system comprises a central control unit (19) and at least two subunits (20), where the central control unit (19) transmits to each subunit (20) a reference AC voltage (ua_ref) and a switching carrier signal (s_sw) and where each subunit (20) controls the switching of the power electronic switches (16) of one of the submodules (15) according to a PWM pattern so that each time the switching carrier signal (s_sw) crosses the reference AC voltage (ua_ref) either the voltage across the capacitor (17) or a zero voltage are applied to output terminals (26, 27) of the corresponding submodule (15).

公开(公告)号：CA2709699C

公开(公告)日：2016-01-26

申请号：CA2709699

申请日：2008-12-23

Applicant: ABB TECHNOLOGY AG

Inventor： DOEFNAES LARS ,  HARNEFORS LENNART ,  PETTERSSON ANDERS J ,  SILJESTROEM ROLAND ,  ASPLUND GUNNAR

IPC: H02M7/483

Abstract: A device for converting a DC voltage into an AC voltage and vice versa comprises a control system to control the voltage conversion and at least one phase leg (1) with a first (Uvp1) voltage source connected in series between a first DC terminal (4) and a first AC terminal (6) and with a second (Uvn1) voltage source connected in series between the first AC terminal (6) and a second DC terminal (5). Each of the voltage sources comprises at least a first and a second submodule (15) in series-connection, where each submodule (15) comprises at least two power electronic switches (16) connected in parallel with at least one capacitor (17). The control system comprises a central control unit (19) and at least two subunits (20), where the central control unit (19) transmits to each subunit (20) a reference AC voltage (ua_ref) and a switching carrier signal (s_sw) and where each subunit (20) controls the switching of the power electronic switches (16) of one of the submodules (15) according to a PWM pattern so that each time the switching carrier signal (s_sw) crosses the reference AC voltage (ua_ref) either the voltage across the capacitor (17) or a zero voltage are applied to output terminals (26, 27) of the corresponding submodule (15).