| 摘要 |
The power section (LT) of an invertor is connected at the upper and lower end (B, C) respectively to the positive and negative potential respectively of a DC voltage source (uP), in each case via a stepped inductor (LS1, LS2) which can be saturated. A circuitry network (BN) is used for switch balancing of the semiconductor switches (T1, T2) of each phase. In this arrangement, a section consisting of a switch-off balancing capacitor (CA), two storage capacitors (CSP1, CSP2) and two switch-off balancing diodes (D10, D20) produces an even switch-off balancing, and a section consisting of two current-rise limiting inductors (L1, L2) and four feedback diodes (D12, D11, D22, D21) produces even switch-on balancing on the upper and lower semiconductor switches (T1, T2) respectively. With the aid of the stepped inductors (LS1, LS2), the power section (LT) and the circuitry network (BN) are temporarily decoupled from the DC voltage source, particularly during the switch-on process of one of the semiconductor switches, such that the buffer-stored circuitry energies are supplied into the load virtually without losses and without any reactive power. …<IMAGE>… |
