公开(公告)号：US20170170720A1

公开(公告)日：2017-06-15

申请号：US15153608

申请日：2016-05-12

申请人： Noble Corporation

发明人： Bo Gao

IPC分类号： H02M1/42 ,  H05B33/08 ,  H02M3/26

CPC分类号： H02M1/4208 ,  H02M1/4266 ,  H02M3/26 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B70/123

摘要： A power supply circuit includes: an anti-electromagnetic interference circuit configured to receive input alternating current power and to output filtered alternating current power; a rectifier circuit configured to rectify the filtered alternating current power; a current correction circuit configured to perform passive power factor correction on the rectified alternating current power; a single-ended flyback converter circuit coupled to the output of the current correction circuit; and a dimming control circuit coupled between the output of the single-ended flyback converter circuit and a light load, wherein the current correction circuit is configured to control a waveform of the rectified alternating current power to follow a current output to the light load in order to provide passive power factor correction.

公开(公告)号：US20170279369A1

公开(公告)日：2017-09-28

申请号：US15177241

申请日：2016-06-08

申请人： NOBLE CORPORATION

发明人： You Wei Meng ,  Bo Gao

IPC分类号： H02M7/06

CPC分类号： H02M7/06 ,  H02M5/12 ,  H02M2001/0048 ,  Y02B70/1491

摘要： A transformer system includes: a main transformer including a primary winding coupled to AC mains and a secondary winding; a load circuit including a load switch configured to be coupled to a load, the load circuit being coupled to the secondary winding of the main transformer; an auxiliary power supply coupled to AC mains; a controller coupled to an output of the auxiliary power supply; an electronic switch between the AC mains and the primary winding of the main transformer and configured to be controlled by the controller; and a load detector coupled to the load circuit and configured to detect whether the load is connected to the main transformer and to output a load signal to the controller in accordance with whether or not the load is connected to the main transformer, wherein the controller is configured to control the electronic switch in accordance with the load signal.

公开(公告)号：US09735669B2

公开(公告)日：2017-08-15

申请号：US15153608

申请日：2016-05-12

申请人： Noble Corporation

发明人： Bo Gao

IPC分类号： H05B41/36 ,  H05B37/02 ,  H05B33/08 ,  H02M1/42 ,  H02M3/26

CPC分类号： H02M1/4208 ,  H02M1/4266 ,  H02M3/26 ,  H05B33/0815 ,  H05B33/0845 ,  Y02B70/123

摘要： A power supply circuit includes: an anti-electromagnetic interference circuit configured to receive input alternating current power and to output filtered alternating current power; a rectifier circuit configured to rectify the filtered alternating current power; a current correction circuit configured to perform passive power factor correction on the rectified alternating current power; a single-ended flyback converter circuit coupled to the output of the current correction circuit; and a dimming control circuit coupled between the output of the single-ended flyback converter circuit and a light load, wherein the current correction circuit is configured to control a waveform of the rectified alternating current power to follow a current output to the light load in order to provide passive power factor correction.

公开(公告)号：US10014796B2

公开(公告)日：2018-07-03

申请号：US15177241

申请日：2016-06-08

申请人： NOBLE CORPORATION

发明人： You Wei Meng ,  Bo Gao

IPC分类号： H02M3/335 ,  H02M3/325 ,  H02M7/06 ,  H02M7/155 ,  H02M7/162 ,  H02M5/12 ,  H02M1/00

CPC分类号： H02M7/06 ,  H02M5/12 ,  H02M2001/0048 ,  Y02B70/1491

摘要： A transformer system includes: a main transformer including a primary winding coupled to AC mains and a secondary winding; a load circuit including a load switch configured to be coupled to a load, the load circuit being coupled to the secondary winding of the main transformer; an auxiliary power supply coupled to AC mains; a controller coupled to an output of the auxiliary power supply; an electronic switch between the AC mains and the primary winding of the main transformer and configured to be controlled by the controller; and a load detector coupled to the load circuit and configured to detect whether the load is connected to the main transformer and to output a load signal to the controller in accordance with whether or not the load is connected to the main transformer, wherein the controller is configured to control the electronic switch in accordance with the load signal.