| 摘要 |
PROBLEM TO BE SOLVED: To provide the structure and the usage of a three-point converter. SOLUTION: This three-point converter is provided with a decoupling network 1 in which the first input of a decoupling network is connected to the positive pole of an intermediate circuit, the first output is connected to the negative pole of the three-point converter and is used for an upper-half bridge, and a decoupling network 2 in which the second input of the decoupling network is connected to the negative pole of the intermediate circuit, the second output of the decoupling network is connected to the negative pole of the three-point converter for a lower-half bridge. The remaining inputs of the decoupling networks 1, 2 are connected to the center tap 3 of the intermediate circuit, the remaining outputs of the decoupling networks 1, 2 are connected to the half of the bridge through an NPC diode, and commutating voltage in the main switches T11,..., T34 of the upper and lower halves of respective bridges are separated from the one of the decoupling networks 1, 2 to be decoupled from 1/2(Vdc) of intermediate circuit voltage.
|
