发明名称 |
POWER CONVERTER WITH DISTRIBUTED CELL CONTROL |
摘要 |
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).
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申请公布号 |
US2011222323(A1) |
申请公布日期 |
2011.09.15 |
申请号 |
US20080811930 |
申请日期 |
2008.12.23 |
申请人 |
DOFNAS LARS;HARNEFORS LENNART;PETTERSSON ANDERS J;SILJESTROEM ROLAND;ASPLUND GUNNAR |
发明人 |
DOFNAS LARS;HARNEFORS LENNART;PETTERSSON ANDERS J.;SILJESTROEM ROLAND;ASPLUND GUNNAR |
分类号 |
H02M7/72 |
主分类号 |
H02M7/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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