Patent ID: 6314006
Filing Date: 2001-11-06
Classification: H02M

Abstract:
A DC/DC converter for producing a DC voltage from a supplied DC voltage with a reversible direction of action, a transformer operating in push-pull on primary and secondary sides, wherein respective center taps are connected to a first terminal (A1, A2) for the respective DC voltage and further winding terminals are each connected via a semiconductor switch (Q1 to Q4) to a second terminal for the respective DC voltage, the semiconductor switches (Q1 to Q4) being controlled synchronously in pairs, wherein a transformation ratio can be changed over in order to change over the direction of action, wherein one of the windings is in each case lengthened symmetrically over the further winding terminals, wherein end terminals f the lengthened windings are connected via further semiconductor switches (Q5 to Q8) to the second terminal for the respective DC voltage, and wherein driving of the further semiconductor switches (Q5 to Q8) is carried out alternatively with driving of the semiconductor switches (Q1, Q3) for the same DC voltage as a function of the direction of action.