Invention Grant
US09531257B2 Power factor corrector with high power factor at low road or high mains voltage conditions
有权
功率因数校正器,在低路或高电源电压条件下具有高功率因数
- Patent Title: Power factor corrector with high power factor at low road or high mains voltage conditions
- Patent Title (中): 功率因数校正器,在低路或高电源电压条件下具有高功率因数
-
Application No.: US13513992Application Date: 2010-12-28
-
Publication No.: US09531257B2Publication Date: 2016-12-27
- Inventor: Cheng Zhang , Hans Halberstadt
- Applicant: Cheng Zhang , Hans Halberstadt
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- International Application: PCT/IB2010/056097 WO 20101228
- International Announcement: WO2011/080702 WO 20110707
- Main IPC: H02M1/42
- IPC: H02M1/42 ; G05F5/00 ; H02M3/156 ; H02M1/00

Abstract:
A power factor corrector raises power factor at low loads or high mains voltages by modifying the switch timing or the current received by the power converter. It achieves this by increasing the switch-on time of a control switch during the falling time so that the majority of the switch-on time during a mains period occurs during the falling time, to thereby control the current received by the converter to compensate for current received by the intermediate filter. Some embodiments may employ a feedback system to produce one or more error signals that modify the control signal used to control the operation of the converter. Various embodiments may also include additional stages that limit the compensation range of the error signal.
Public/Granted literature
- US20120300517A1 POWER FACTOR CORRECTOR WITH HIGH POWER FACTOR AT LOW LOAD OR HIGH MAINS VOLTAGE CONDITIONS Public/Granted day:2012-11-29
Information query