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    • 6. 发明授权
    • Switched-mode power supply
    • 开关电源
    • US5729447A
    • 1998-03-17
    • US637704
    • 1996-04-30
    • Manfred AlbachThomas Durbaum
    • Manfred AlbachThomas Durbaum
    • H02M3/28H02M3/335H02H7/122H02M7/00
    • H02M3/33507
    • A switched-mode power supply includes a transformer (L.sub.p, N), having its primary winding arranged to receive electric energy from an energy source (U.sub.in) in periodically recurring time intervals (t0 to t1), and having at least one secondary winding enabling the energy to be taken from the transformer (L.sub.p, N), and to be applied to a storage inductance (L.sub.o) and a load impedance (C.sub.o, R.sub.L) 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 (L.sub.o) and to the load impedance (C.sub.o, R.sub.L) during the time intervals (t0-t1), a second current path is adapted to demagnetize the transformer (L.sub.p, N) via its secondary winding and the load impedance (C.sub.o, R.sub.L), and the third current path is adapted to demagnetize the storage inductance (L.sub.o) via the load impedance (C.sub.o, R.sub.L), the second and the third current path being formed in such a manner that the demagnetizations of the transformer (L.sub.p, N) and the storage inductance (L.sub.o) are effected outside the time intervals (t0-t1) and, simultaneously, are not influenced by one another.
    • PCT No.PCT / IB95 / 00730 Sec。 371日期:1996年04月30日 102(e)日期1996年4月30日PCT 1995年9月5日PCT公布。 公开号WO96 / 08071 日期1996年3月14日一种开关电源包括一个变压器(Lp,N),其初级绕组被布置为以周期性循环时间间隔(t0至t1)从能量源(Uin)接收电能,并具有 至少一个次级绕组使得能够从变压器(Lp,N)获取能量,并通过整流器装置(D1至D4)施加到存储电感(Lo)和负载阻抗(Co,RL)。 由于整流器装置(D1至D4)包括三个电流路径,其中第一电流路径适于向存储电感(Lo)和负载阻抗(Lo)供应能量,因此利用低复杂度的电路获得了改善的效率 Co,RL),第二电流路径适于通过其次级绕组和负载阻抗(Co,RL)去除变压器(Lp,N),并且适配第三电流路径 通过负载阻抗(Co,RL)使存储电感(Lo)消磁,第二和第三电流路径形成为使得变压器(Lp,N)和存储电感(Lo)的退磁是 在时间间隔(t0-t1)之外实现,同时不受彼此影响。