US 11,964,577 B2
Low voltage DC-DC converter of environmentally friendly vehicle, and method for outputting constant voltage using the same
KwangKyu Park, Whasung-Si (KR); Ui Jung Jung, Whasung-Si (KR); and Seungchan Lee, Whasung-Si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on May 19, 2022, as Appl. No. 17/748,652.
Claims priority of application No. 10-2021-0097055 (KR), filed on Jul. 23, 2021.
Prior Publication US 2023/0027762 A1, Jan. 26, 2023
Int. Cl. B60L 53/20 (2019.01); B60L 3/00 (2019.01); H02M 1/00 (2006.01); H02M 3/158 (2006.01)
CPC B60L 53/20 (2019.02) [B60L 3/0046 (2013.01); H02M 1/0045 (2021.05); H02M 1/0067 (2021.05); H02M 3/158 (2013.01); B60L 2210/10 (2013.01); B60L 2240/527 (2013.01); B60L 2240/547 (2013.01); H02M 1/007 (2021.05)] 17 Claims
OG exemplary drawing
 
1. A low voltage DC-DC converter of a vehicle, the low voltage DC-DC converter comprising:
a first DC-DC converter configured to drop a second voltage lower than a first voltage supplied to a drive motor of the vehicle to a third voltage;
a voltage regulator configured to regulate the third voltage to output a fourth voltage lower than the third voltage;
a controller configured to operate in response to the fourth voltage; and
a second DC-DC converter configured to convert and output the first voltage into the third voltage in response to an output signal of the controller,
wherein an output voltage of the second DC-DC converter is supplied to the voltage regulator.