公开(公告)号：EP0262739A3

公开(公告)日：1988-10-12

申请号：EP87201858

申请日：1987-09-29

申请人： Philips Patentverwaltung GmbH ,  N.V. Philips' Gloeilampenfabrieken

发明人： Lösel, Walter

IPC分类号： H02M03/155 ,  H02M03/10

CPC分类号： H02M3/33561

公开(公告)号：EP0199903A3

公开(公告)日：1987-10-07

申请号：EP86101424

申请日：1986-02-04

申请人： HITACHI, LTD.

发明人： Muto, Nobuyoshi ,  Sakai, Keijiro ,  Suzuki, Toshio ,  Ueda, Akiteru ,  Nando, Kenji ,  Okajima, Ikuo

IPC分类号： H02M03/10

CPC分类号： H02M3/157

摘要： A single phase, full wave diode bridge circuit (20) is connected with a chopper (30) on its DC output side. The output voltage of the chopper (30) is smoothed by a smoothing capacitor (40) and thereafter supplied to a load (50). A current control apparatus (80-100) forms a current reference signal which is synchronized with an AC voltage applied to the bridge circuit (20) and has a magnitude corresponding to the current flowing through the load (50) and produces a deviation signal between the current reference signal and an actual AC input current of the bridge circuit (20). The chopper (30) is controlled in accordance with the deviation signal so that the AC input current follows the current reference signal, whereby the power factor and the waveform of the AC input current is improved.