A Flexible Voltage Bus Converter for the 48-/12-V Dual Supply System in Electrified Vehicles
- Authors
- Kim, Taehyung; Kwak, Sangshin
- Issue Date
- Mar-2017
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Dual supply net; more electric vehicles; 48-V power supply
- Citation
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.66, no.3, pp 2010 - 2018
- Pages
- 9
- Journal Title
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
- Volume
- 66
- Number
- 3
- Start Page
- 2010
- End Page
- 2018
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/4720
- DOI
- 10.1109/TVT.2016.2570817
- ISSN
- 0018-9545
1939-9359
- Abstract
- Due to an increasing in-vehicle electric load demand, a new 48-V electric system architecture proposed by German premier car manufacturers has been gaining increasing attention recently for electrified vehicles. In this paper, a multiple-voltage bus converter for the 48-V and existing 12-V dual supply system, providing additional flexible dc bus voltages, is proposed. The proposed converter can provide a dual flexible dc voltage bus and an additional dependent voltage bus while simultaneously managing the 12-V supply net using only one single-leg switch pole and a diode. The additional dc voltage buses will provide more options to accommodate variable electric load components in a vehicle, improving their power density. Due to themultiple control objectives, the single-leg pole requires a multimode switching strategy to regulate the additional bus voltages. To improve the onboard vehicle system reliability and performance, an impedance network structure is implemented in the converter to obtain a dead-time-free pulsewidth modulation (PWM). Simulation and experimental results are presented to verify the feasibility and effectiveness of the proposed structure and control method.
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