Method for the operation of a bidirectional voltage converter (SW) that comprises an input-side half-bridge circuit (H1) with respectively a positive-voltage-side (S1) and a negative-voltage-side (S2) transistor switch connected in series with one another, an output-side half-bridge circuit (H2) with respectively a positive-voltage-side (S3) and a negative-voltage-side (S4) transistor switch connected in series with one another, and a bridge branch (BZ) with a bridge inductance (L); - wherein an input voltage (U1) at the input-side half-bridge circuit (H1) and an output voltage (U2) at the output-side half-bridge circuit (H2) are measured; - wherein for a respective subsequent switching cycle T1 of the transistor switches (S1, S2, S3, S4) in a respective current switching cycle T0, an actual mean bridge current value IL_avg_mess of a bridge current (IL) flowing through the bridge branch (BZ) is ascertained; - wherein with the actual mean bridge current value IL_avg_mess ascertained switch-on time points and switch-on durations of the respective transistor switches (S1, S2, S3, S4) for the respective subsequent switching cycle T1 are ascertained; - wherein the respective transistor switches (S1, S2, S3, S4) are switched on at the respective ascertained switch-on time points and for the respective ascertained switch-on durations in the respective subsequent switching cycle T1, characterized in that - an instantaneous bridge current value Istart1a, Istart1b; Istart2a, Istart2b; Istart3a, Istart3b of the bridge current (IL) is furthermore ascertained in the respective current switching cycle T0, which bridge current should flow through the bridge branch (BZ) at the time at which one of the transistor switches (S1, S2, S3, S4) is switched over from a switched-on state into a switched-off state; and - the switch-on time points and the switch-on durations are furthermore ascertained with the ascertained instantaneous bridge current value Istart1a, Istart1b; Istart2a, Istart2b; Istart3a, Istart3b on the basis of the input voltage (U1) and the output voltage (U2). - wherein an input voltage (U1) at the input-side half-bridge circuit (H1) and an output voltage (U2) at the output-side half-bridge circuit (H2) are measured; - wherein for a respective subsequent switching cycle T1 of the transistor switches (S1, S2, S3, S4) in a respective current switching cycle T0, an actual mean bridge current value IL_avg_mess of a bridge current (IL) flowing through the bridge branch (BZ) is ascertained; - wherein with the actual mean bridge current value IL_avg_mess ascertained switch-on time points and switch-on durations of the respective transistor switches (S1, S2, S3, S4) for the respective subsequent switching cycle T1 are ascertained; - wherein the respective transistor switches (S1, S2, S3, S4) are switched on at the respective ascertained switch-on time points and for the respective ascertained switch-on durations in the respective subsequent switching cycle T1, characterized in that - an instantaneous bridge current value Istart1a, Istart1b; Istart2a, Istart2b; Istart3a, Istart3b of the bridge current (IL) is furthermore ascertained in the respective current switching cycle T0, which bridge current should flow through the bridge branch (BZ) at the time at which one of the transistor switches (S1, S2, S3, S4) is switched over from a switched-on state into a switched-off state; and - the switch-on time points and the switch-on durations are furthermore ascertained with the ascertained instantaneous bridge current value Istart1a, Istart1b; Istart2a, Istart2b; Istart3a, Istart3b on the basis of the input voltage (U1) and the output voltage (U2). <EOS>