Procedure for the operation of an inverter-controlled bridge and bridge connection for the implementation of the procedure.

摘要

The method is used for operating an invertor-controlled bridge circuit for pulse-width modulation, especially for regulating a load connected in the diagonal branch of the bridge circuit via an inductive transformer. Electronic switches (transistors), controlled by the invertor, are provided in the bridge branches. These switches are opened and closed in pairs and in an alternating sequence. Of the two pairs of electronic switches (5, 6; 7, 8), which are in each case activated in pairs, the one pair (6; 8) are operated at a duty cycle of barely 50%. The other electronic switches (5; 7) are used for the pulse-width modulation. The two electronic switches (6; 8) which are operated with a duty cycle of barely 50% are connected to a single inductive transformer (14). This transformer has two secondary windings (15, 16) which are arranged in a balanced manner and are connected in opposite polarity. One of the two electronic switches (6; 8) which is operated with a duty cycle of barely 50% is connected to each of the two secondary windings. IMAGE