Control method for controlling a power converter circuit and respective power converter circuit

A power converter circuit comprising:

• at least one inductive element storing an output energy;
• a charging switch for charging the inductive element;
• a releasing switch for releasing the stored output energy from the inductive element and for charging the inductive element with a compensation energy;
• an output capacitor saving the released output energy;
• a control means for controlling the charging switch and the releasing switch;
• and
• a measuring means for measuring a compensation control variable in said power converter circuit, wherein said control means comprises a closed-loop controller controlling the compensation control variable or a characteristic value derived from this compensation control variable to adjust a turn on time of the releasing switch and said measuring means comprises an auxiliary winding, wherein the measuring means is configured to measure a differential voltage across the auxiliary winding and the control means closed-loop controller is configured to carry out the closed loop control to adjust the turn on time of the releasing switch on a basis of the measured differential voltage across the auxiliary winding or on a basis of a characteristic value derived from this differential voltage.

A power converter circuit comprising:

• at least one inductive element storing an output energy;
• a charging switch for charging the inductive element;
• a releasing switch for releasing the stored output energy from the inductive element and for charging the inductive element with a compensation energy;
• an output capacitor saving the released output energy;
• a measuring means for measuring a differential voltage across the charging switch in the power converter circuit or for measuring a variable representing said differential voltage across the charging switch in the power converter circuit as a compensation control variable, said measuring means comprising an auxiliary winding, wherein the measuring means is configured to measure a differential voltage across the auxiliary winding as the variable voltage representing the differential voltage across the charging switch;
• and
• a control means for controlling the charging switch and the releasing switch, said control means comprising a closed-loop controller configured to carry out a closed loop control to adjust the turn on time of the releasing switch based on the measured differential voltage across the auxiliary winding or based on a characteristic value derived from the differential voltage across the auxiliary winding.