SEKUNDAERSEITIG SCHALTBARES NETZGERAET.

摘要

The power supply has a three-phase transformer with three secondary windings and a rectifier followed by a lowpass filter to smooth the dc voltage. The second connections of the secondaries (S1-3) are connected to two e-phase star rectifier circuits (11 etc.) that produce two dc voltages of opposite polarity w.r.t. neutral. Each dc voltage is smoothed using an LC filter (SL1, SC1 etc.) whose filtering capacitors ahve a shared point (F) connected via an extra inductor (ZL) to neutral (St). The extra inductor has an inductance chosen so that the load current flows through the extra inductor with independently operated switches (NS).