Title:
BUCK-BOOST CONVERTER BY VARIABLE HYSTERESIS CONTROL, CONTROL METHOD THEREOF, AND ELECTRIC VEHICLE CHARGER USING DIRECT CURRENT INPUT
Document Type and Number:
WIPO Patent Application WO/2023/075075
Kind Code:
A1
Abstract:
A buck-boost converter according to the present invention converts power of an input voltage of a direct current power source and provides an output voltage having a predetermined input/output voltage ratio with respect to the input voltage to an output terminal. The buck-boost converter is controlled to operate in an operation mode which is a buck mode in a range where the input/output voltage ratio is less than a first mode change threshold value, operate in an operation mode which is a buck-boost mode in a range where the input/output voltage ratio is between the first mode change threshold value and a second mode change threshold value greater than the first mode change threshold value, and operate in an operation mode which is a boost mode in a range where the input/output voltage ratio is greater than the second mode change threshold value, wherein the first and second mode change threshold values have hysteresis at the time of operation mode change, and a hysteresis gap decreases with the lapse of time after operation mode change. Accordingly, the present invention can maximize the efficiency of a system by maximizing the probability of operating in a buck or boost converter operation mode while stabilizing the system by minimizing a change of the operation mode.
Inventors:
SHIN DONG HEE (KR)
KIM BU SUNG (KR)
KIM BU SUNG (KR)
Application Number:
PCT/KR2022/009588
Publication Date:
May 04, 2023
Filing Date:
July 04, 2022
Export Citation:
Assignee:
EVSIS CO LTD (KR)
International Classes:
H02M3/158; H02J1/00; H02M1/00; H02M1/08; H02S40/00
Foreign References:
| KR20180108114A | 2018-10-04 | |||
| KR102295755B1 | 2021-08-31 | |||
| KR101050733B1 | 2011-07-20 | |||
| US20160105110A1 | 2016-04-14 | |||
| KR102193987B1 | 2020-12-22 | |||
| KR102391263B1 | 2022-04-27 |
Attorney, Agent or Firm:
KIM, Nam In (KR)
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