阅读说明：本技术 同步反激式转换器电路 (Synchronous flyback converter circuit ) 是由 R·克洛茨 于 2020-03-20 设计创作，主要内容包括：本发明涉及一种反激式转换器电路(3),所述反激式转换器电路具有：可控制的第一开关(8),具有电容(14)；可控制的第二开关(11)；变压器(7),具有初级绕组(6),所述初级绕组与所述第一开关(8)耦合,和次级绕组(10),所述次级绕组与所述第二开关(11)耦合；控制设备(13),所述控制设备设计用于在通过所述第二开关(11)的电流在降至零之后达到负值时关断所述第二开关(11),其中使所述电容(14)在关断所述第一开关(8)后充电并且在关断所述第二开关(11)后放电,以及用于确定所述电容(14)的放电速度的量度的装置(1),用于确定在关断所述第二开关的时间点流过所述第二开关(11)的电流。(The invention relates to a flyback converter circuit (3) having: a controllable first switch (8) having a capacitance (14); a controllable second switch (11); a transformer (7) having a primary winding (6) coupled to the first switch (8), and a secondary winding (10) coupled to the second switch (11); a control device (13) which is designed to switch off the second switch (11) when the current through the second switch (11) reaches a negative value after having fallen to zero, wherein the capacitor (14) is charged after the first switch (8) has been switched off and discharged after the second switch (11) has been switched off, and means (1) for determining a measure of the discharge speed of the capacitor (14) for determining the current flowing through the second switch (11) at the point in time when the second switch is switched off.)