A device for voltage regulation in the case of direct current - on-board networks

摘要

A direct current regulator for motor vehicles and the like gives a constant output voltage in the case of a greatly variable input voltage, even when the throughput power is high. It comprises a blocking converter circuit in which a by-pass connection (1), optionally controllable, leads to the secondary winding of the converter transformer (20) from the input (23). In the step-up regulation mode, the transistor (2) is repeatedly switched on and off in the manner of a blocking converter but a proportion of the power to be transmitted is fed to the secondary side by way of this by-pass connection (transistor 1), whilst, in the step-down regulation mode, the blocking transistor (2) is kept off while the by-pass connection (transistor 1) is repeatedly interrupted, the decay current through the secondary winding (5) flowing through a free-running diode (4). IMAGE