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    • 5. 发明授权
    • Power converter with distributed cell control
    • 具有分布式电池控制的功率转换器
    • US08400796B2
    • 2013-03-19
    • US12811930
    • 2008-12-23
    • Lars DöfnäsLennart HarneforsAnders J. PetterssonGunnar AsplundErika Siljestrom
    • Lars DöfnäsLennart HarneforsAnders J. PetterssonRoland SiljeströmGunnar Asplund
    • H02M7/00H02M1/14
    • H02M7/483H02M7/5395H02M2007/4835
    • 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).
    • 用于将DC电压转换为AC电压的装置反之亦然包括控制系统,用于控制电压转换和至少一个相位支路(1),其中第一(Uvp1)电压源串联连接在第一直流端子(4) )和第一AC端子(6)以及串联连接在第一AC端子(6)和第二DC端子(5)之间的第二(Uvn1)电压源。 每个电压源包括串联连接的至少第一和第二子模块(15),其中每个子模块(15)包括与至少一个电容器(17)并联连接的至少两个电力电子开关(16)。 控制系统包括中央控制单元(19)和至少两个子单元(20),其中中央控制单元(19)向每个子单元(20)传输参考AC电压(ua_ref)和开关载波信号(s_sw) 并且其中每个子单元(20)根据PWM模式控制子模块(15)之一的功率电子开关(16)的切换,使得每当切换载波信号(s_sw)与参考AC电压(ua_ref)交叉时, 电容器(17)两端的电压或零电压都被施加到相应的子模块(15)的输出端子(26,27)。