| 摘要 |
PCT No. PCT/IB95/00730 Sec. 371 Date Apr. 30, 1996 Sec. 102(e) Date Apr. 30, 1996 PCT Filed Sep. 5, 1995 PCT Pub. No. WO96/08071 PCT Pub. Date Mar. 14, 1996A switched-mode power supply includes a transformer (Lp, N), having its primary winding arranged to receive electric energy from an energy source (Uin) in periodically recurring time intervals (t0 to t1), and having at least one secondary winding enabling the energy to be taken from the transformer (Lp, N), and to be applied to a storage inductance (Lo) and a load impedance (Co, RL) by a rectifier arrangement (D1 to D4). An improved efficiency is obtained with a circuit of low complexity in that the rectifier arrangement (D1 to D4) includes three current paths, of which a first current path is adapted to supply energy to the storage inductance (Lo) and to the load impedance (Co, RL) during the time intervals (t0-t1), a second current path is adapted to demagnetize the transformer (Lp, N) via its secondary winding and the load impedance (Co, RL), and the third current path is adapted to demagnetize the storage inductance (Lo) via the load impedance (Co, RL), the second and the third current path being formed in such a manner that the demagnetizations of the transformer (Lp, N) and the storage inductance (Lo) are effected outside the time intervals (t0-t1) and, simultaneously, are not influenced by one another.
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