Power factor correction device, and controller and THD attenuator used by same
US9124170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2011 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jun 21, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.