Title:
POWER CONVERSION SYSTEM, POWER CONVERSION APPARATUS, AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/242135
Kind Code:
A1
Abstract:
The present application provides a power conversion system, a power conversion apparatus, and a control method therefor. In the power conversion apparatus, input terminals of each DC/DC conversion circuit inside the power conversion apparatus are respectively connected to corresponding input power supplies, and the output terminals are connected in parallel. At least one DC/DC conversion circuit has a common positive electrode structure for input and output. Furthermore, at least one other DC/DC conversion circuit has a common negative electrode structure for input and output. Moreover, at least one input terminal negative electrode of the DC/DC conversion circuit which has a common positive electrode structure for input and output is connected, by means of a corresponding switch unit, to at least one input terminal positive electrode of the DC/DC conversion circuit which has a common negative electrode structure for input and output. Therefore, when the voltage of the input power supply is low, the switch unit can be conducted, so that input power supplies at two sides of the switch unit are connected in series. In addition, due to the structural configuration of the DC/DC conversion circuits at two sides of the switch unit, the two are bypassed, thereby increasing the conversion efficiency of the apparatus and reducing the heat generated by the circuit.
Inventors:
CHEN PENG (CN)
SUN SHUAI (CN)
SUN SHUAI (CN)
Application Number:
PCT/CN2021/138257
Publication Date:
November 24, 2022
Filing Date:
December 15, 2021
Export Citation:
Assignee:
SUNGROW POWER SUPPLY CO LTD (CN)
International Classes:
H02M3/158; H02M1/42
Domestic Patent References:
| WO2020133351A1 | 2020-07-02 |
Foreign References:
| CN113258773A | 2021-08-13 | |||
| DE102006023563A1 | 2007-11-22 | |||
| CN104953945A | 2015-09-30 | |||
| CN103269157A | 2013-08-28 | |||
| CN104104248A | 2014-10-15 | |||
| US20050254272A1 | 2005-11-17 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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