Title:
PFC AND LLC RESONANCE-BASED INTELLIGENT FULL-BRIDGE SINE-WAVE VOLTAGE CONVERSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/107619
Kind Code:
A1
Abstract:
A PFC and LLC resonance-based intelligent full-bridge sine-wave voltage conversion circuit, comprising: an input rectification unit (10), a filtering unit (20), a PFC voltage boosting unit (30), and an LLC isolation converter unit (40), a DC voltage filtering unit (50), and an inverter unit (70). The LLC isolation converter unit comprises a first switching transistor (Q6), a second switching transistor (Q7), a first freewheeling diode (D6), a second freewheeling diode (D5), a transformer (T1), a resonant capacitor (C4), and a discharge resistor (R2B). The inverter unit comprises an inverter bridge consisting of a fourth switching transistor (Q1), a fifth switching transistor (Q2), a sixth switching transistor (Q3), and a seventh switching transistor (Q4) and a filtering inductor (L3), the output end of the inverter bridge being connected to the front end of the filtering inductor, the back end of the filtering inductor being connected to a load, and the filtering inductor being used for filtering out a high-frequency pulse in alternating current and supplying power frequency sine-wave alternating current to the load. The voltage conversion circuit can improve a power factor value and can also filter out a high-frequency pulse at an output side, so as to provide high-quality power frequency sine-wave alternating current for a load.
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Inventors:
HOU TAO (CN)
Application Number:
PCT/CN2017/079185
Publication Date:
June 21, 2018
Filing Date:
April 01, 2017
Export Citation:
Assignee:
GUANGDONG BESTEK E COMMERCE CO LTD (CN)
International Classes:
H02M1/12; H02M1/42; H02M3/335; H02M5/458; H02M7/5395
Foreign References:
| CN101505107A | 2009-08-12 | |||
| CN105006957A | 2015-10-28 | |||
| CN106533193A | 2017-03-22 | |||
| CN106533195A | 2017-03-22 |
Attorney, Agent or Firm:
GUANGZHOU NANFENG PATENT AGENCY CO. LTD. (CN)
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