摘要:
A multilevel converter including, in particular, a voltage source, a current source, and a capacitor for each of its cells, and a controller. The controller evaluates any current difference between an observed current through the current source and a current requested by the current source. The controller also includes ON-time controller for taking into account the current difference, if any, and altering accordingly a duration of the first conduction state of all of the cells in the converter in a direction suitable for reducing the current difference. The controller also maintains all of the floating capacitors at their equilibrium voltage values.
摘要:
A multilevel converter including, in particular, a capacitor (C1, C2, . . . , Cn) for each of its cells, and control means comprising means (VMO1, VMO2, . . . , VMOn) for evaluating the mean voltage across the terminals of each of the capacitors (C1, C2, . . . , Cn), means (VE1, VE2, . . . , VEn) for measuring any difference on each of said capacitors (C1, C2, . . . , Cn) between the evaluated mean charge voltage and the nominal mean charge voltage of the capacitor, and additional control means (MCC1, MCC2, . . . , MCCn) changing the duration of said first conduction state of the cell associated with said capacitor in a direction such that the measured difference is reduced.
摘要:
A multilevel converter including, in particular, a capacitor for each of its cells, and control means comprising means for evaluating the mean voltage across the terminals of each of the capacitors, means for measuring any difference on each of said capacitors between the evaluated mean charge voltage and the nominal mean charge voltage of the capacitor, and additional control means changing the time positions of the converter control signals in a direction such that the measured difference is reduced.
摘要:
A multilevel converter comprising, in particular, one capacitor (C1, C2, . . . , Cn) and two switches (T1, T'1; for example) in each of its cells. The cells operate successively in a period that repeats at a converter frequency. In parallel with the load (C), a filter circuit (CF) is provided to dissipate the energy of any component having a fundamental frequency that corresponds to said converter period. The filter comprises one or more RLC type series circuits.
摘要:
A multilevel converter including, in particular, a capacitor (C1, C2, . . . , Cn) for each of its cells. The capacitors have nominal charge voltages proportional to their respective ranks in the converter. It also includes control means (BT, DA1, . . . , DAn, pe2, . . . , pen) organized to evaluate said voltage of the voltage source (VECn), and whenever it is insufficient, to suspend said nominal operation of the converter (SE) and to act on said switches (T1, T'1; T2; T'2; . . . ; Tn, T'n) in such a manner that initially, while said voltage of the voltage source is being established, it begins by charging all of the capacitors of the converter (C1, C2, . . . , Cn), after which said control means establish said nominal operation of the converter.
摘要翻译:PCT No.PCT / FR95 / 01748 Sec。 371日期:1996年7月23日 102(e)日期1996年7月23日PCT 1995年12月28日PCT PCT。 WO96 / 21267 PCT出版物 日期1996年7月11日一种多电平转换器,特别包括其每个电池的电容器(C1,C2,...,Cn)。 电容器具有与其在转换器中的相应等级成比例的标称充电电压。 它还包括组织以评估电压源(VECn)的所述电压的控制装置(BT,DA1,...,DAn,+ E,uns pe + EE 2,...,+ E,uns pe + EE n) ,并且每当不足时,暂停转换器(SE)的所述标称操作并且在这样的状态下作用于所述开关(T1,T'1; T2; T'2; ... Tn,T'n) 最初,当电压源的所述电压正在建立时,它开始对转换器(C1,C2,...,Cn)的所有电容器充电,之后所述控制装置建立转换器的所述标称操作 。