Invention Grant
US09124170B2 Power factor correction device, and controller and THD attenuator used by same
有权
功率因数校正装置，以及由其使用的控制器和THD衰减器
- Patent Title: Power factor correction device, and controller and THD attenuator used by same
- Patent Title (中): 功率因数校正装置，以及由其使用的控制器和THD衰减器
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Application No.: US13878757Application Date: 2011-10-11
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Publication No.: US09124170B2Publication Date: 2015-09-01
- Inventor: Wenhao Gu , Runqin Tan , Lifang Guo
- Applicant: Wenhao Gu , Runqin Tan , Lifang Guo
- Applicant Address: CN Shenzhen
- Assignee: FREMONT MICRO DEVICES (SHENZHEN) LIMITED
- Current Assignee: FREMONT MICRO DEVICES (SHENZHEN) LIMITED
- Current Assignee Address: CN Shenzhen
- Priority: CN201010501504 20101011
- International Application: PCT/CN2011/080630 WO 20111011
- International Announcement: WO2012/048630 WO 20120419
- Main IPC: H02M1/12
- IPC: H02M1/12 ; H02M1/42 ; H02M3/335
Abstract:
A power factor correction device, and a controller and a total harmonic distortion (THD) attenuator used by same. The power factor correction device comprises a converter and a controller (320) connected to the converter to obtain an input voltage. The controller (320) comprises a THD attenuator (407) for automatic THD optimization. The converter comprises an input current detection resistor (3R8), a power switch tube (3NMOS) and an output circuit. The input current detection resistor (3R8), the power switch tube (3NMOS) and the output circuit form a feedback control loop to maintain a constant output voltage. A THD optimization function is built in the device so that the entire device is capable of being accurately offset to a designed voltage so as to be used for THD optimization, thereby dispensing with external manual adjustment and overcoming internal technical deviations while achieving high consistency.
Public/Granted literature
- US20130201731A1 POWER FACTOR CORRECTION DEVICE, AND CONTROLLER AND THD ATTENUATOR USED BY SAME Public/Granted day:2013-08-08
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