| 摘要 |
The blocking transducer has a transformer (TRA) with at least one primary winding and at least one secondary winding (WSE), whereby the primary winding is connected in series with a controlled switch to an input d.c. voltage and a rectifier (GLR) and charging capacitor (LAC) are connected after the secondary winding. A switch drive circuit, which receives a control signal derived from the flux change in the demagnetization phase, opens the switch at the end of the magnetization phase and closes it after demagnetization of the core. The transformer has first and second primary windings (WP1,WP2), each connected via one of two switches (CS1,CS2) controlled by one of two drive circuits (AS1,AS2) to one of two input d.c. voltages (UE1,UE2). |
