Title:
PFC AND LLC RESONANCE-BASED SMART FULL BRIDGE CORRECTION WAVE VOLTAGE CONVERSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/107618
Kind Code:
A1
Abstract:
A power-factor correction (PFC) and LLC resonance-based smart full bridge correction wave voltage conversion circuit, comprising: an input rectifying unit (10); a filtering unit (20); a PFC boosting unit (30); an LLC isolating converter unit (40), comprising a first switch tube (Q6), a second switch tube (Q7), a first flyback diode (D6), a second flyback diode (D5), a transformer (T1), a resonant capacitor (C4), and a discharging resistor (R2B); a drain of the first switch tube (Q6) is connected to an output terminal of the PFC boosting unit (30), while a source of the first switch tube (Q6) is connected to a first terminal of the transformer (T1), a second terminal of the transformer (T1) being connected to a front end ground by means of the resonant capacitor (C4); a drain of the second switch tube (Q7) is connected to the source of the first switch tube (Q6), while a source of the second switch tube (Q7) is connected to the front end ground by means of the discharging resistor (R2B), and a center tap of a secondary side winding of the transformer (T1) acts as an output terminal of the LLC isolating converter unit (40). The voltage conversion circuit may increase the power factor (PF) value of a voltage conversion device, improve the quality of output voltage, and achieve the effects of safety, reliability, and the like.
Inventors:
LIAO ZHIGANG (CN)
Application Number:
PCT/CN2017/079184
Publication Date:
June 21, 2018
Filing Date:
April 01, 2017
Export Citation:
Assignee:
GUANGDONG BESTEK E COMMERCE CO LTD (CN)
International Classes:
H02M5/458; H02M1/42
Foreign References:
| CN106533195A | 2017-03-22 | |||
| CN103117642A | 2013-05-22 | |||
| CN101527520A | 2009-09-09 | |||
| CN104578820A | 2015-04-29 | |||
| US20110241430A1 | 2011-10-06 | |||
| CN206332616U | 2017-07-14 |
Attorney, Agent or Firm:
GUANGZHOU NANFENG PATENT AGENCY CO. LTD. (CN)
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