Supply of load with variable DC from AC mains - has capacitor in bridge connected to AC terminals through controlled diodes

摘要

A rectifier bridge is connected to the ac mains (6) its output being connected to the load, and its diodes (13a,14a, 21, 22) are connected in a bridge, with at least the diodes in one bridge half being controllable and forcibly extinguished. It has further a being connected to the load, and its diodes (13a,14a,21,22) filter capacitor in parallel with the rectifier ac input terminals. The filter capacitor (20) is connected to the mains side terminals (8, 9) through non-controlled diodes (21, 22) in the bridge series arms. In another arrangement, a filter capacitor is also connected in the other half of the rectifier bridge.