Title:
AC/DC POWER SUPPLY SYSTEM AND CONTROL METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/151272
Kind Code:
A1
Abstract:
An AC/DC power supply system, comprising an AC power supply, a power factor correction (PFC) circuit, a control circuit, bus capacitance, a switching circuit, a DC/DC isolation power stage and output capacitance and output load. Wherein the input of the PFC module is an AC power supply, the output thereof is a bus voltage, the input of the switching circuit is a bus voltage, the output thereof is four terminals, every two terminals as a group are respectively connected to the input ends of two DC/DC modules, and the output ends of the DC/DC modules are connected in parallel and supply power to the output capacitance and load. The control circuit sets the output voltage of the PFC module according to an effective value or a peak value of a detected input voltage, controls the operation of the PFC circuit according to detected signals Vbus_s and PFC sampling signals to realize the PFC function and stabilize the bus voltage Vbus, at the same time, controls the switching circuit to change the access mode of the DC/DC module according to the effective value or the peak value of the detected input voltage, or directly changes the operating mode of the subsequent-stage DC/DC through a control signal, so that the power supply system operates in the optimal operating state.
Inventors:
YUAN YUAN (CN)
Application Number:
PCT/CN2019/112796
Publication Date:
July 30, 2020
Filing Date:
October 23, 2019
Export Citation:
Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
H02M7/219; H02M1/42; H02M3/335
Foreign References:
| CN109617431A | 2019-04-12 | |||
| CN105226929A | 2016-01-06 | |||
| CN105763065A | 2016-07-13 | |||
| CN105119334A | 2015-12-02 | |||
| US20030090913A1 | 2003-05-15 |
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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