| 摘要 |
A switched voltage converter built up asymmetrically or symmetrically with one (S1) or two controlled semiconductor switches, respectively, present in a series arrangement, which is further formed with a first coil (L1) and a first semiconductor switching element (D1) in the form of, for example, a diode. A coil connection is connected to a terminal of a first (C1) and a second (C2) capacitor, respectively. Arranged in parallel with the switch (S1) there is a series arrangement of the first capacitor (C1) and of the parallel arrangement consisting of a second coil (L2) and a second diode (D2) in series and of a third diode (D3) and a third capacitor (C3) in series. The junction point of the third diode (D3) and the third capacitor (C3) is connected to the first diode (D1) via a d.c. connection formed with a fourth (D4) and a fifth (D5) diode. The junction point of the fourth (D4) and the fifth (D5) diode is connected via the second capacitor (C2) to the junction point of the first coil (L1) and the first diode (D1) which coil (L1) also has an inductive load (LD) connected to it. The converter operates with a snubber circuit for voltage changes at the switch (S1) by the use of the third diode (D3) and the third capacitor (C3). If this circuit can be, dispensed with. the converter is used without the third capacitor (C3) and the fifth diode (D5), with the third diode (D3) being connected to the junction point of the second capacitor (C2) and the fourth diode (D4). The converter then operates only with a snubber circuit for current changes. |
