| 摘要 |
<p>The multilevel convertor includes capacitors (C1,C2...,Cn) for each of its cells. The capacitors have nominally charge voltages proportional to their row in the convertor. The convertor also includes control devices (BT, DA1...,DAn, pe2...,pen) designed to evaluate the voltage source (VECn) of the convertor. As soon as the voltage source (VECn) of the convertor is less than a set value, to suspend the nominal function of the convertor (sd) and to operate switches (T1,T`1,T2,T`2...,Tn,T`n) so that when the voltage (VE) of the voltage source (SE) has a value between zero and a least high nominal charge voltage, it charges all the capacitors of the convertor. When the voltage of the voltage source exceeds the least high nominal charge voltage, the capacitor (C1), nominally charged by this last voltage, is switched out of circuit. The voltage of the voltage source continues to charge the capacitors (C2...,Cn) demanding higher nominal charge voltages until the voltage exceeds that next least high voltage (C2), capacitor (C2) is then switched out, this continues until all the capacitors are charged to their nominal charge voltages. At the end of the complete charging sequence the control device restores the nominal operation of the convertor.</p> |
