A Modular-Designed Three-Phase High-Efficiency High-Power-Density EV Battery Charger Using Dual/Triple-Phase-Shift Control
By Juncheng Lu, K. Bai, A. Taylor, Guanliang Liu, Alan Brown, Philip Michael Johnson, Matt Mcammond. IEEE transactions on power electronics, 2018
155 citations recorded by the source corpus.
In this paper, an enhancement-mode GaN high-electron mobility transistor (HEMT)-based 7.2-kW single-phase charger was built. Connecting three such single-phase modules to the three-phase grid, respectively, generates a three-phase ∼22-kW charger with the <inline-formula><tex-math notation="LaTeX">$>{\text{97}}\% $</tex-math></inline-formula> efficiency and <inline-formula><tex-math notation="LaTeX">$>{\text{3.3}}-{\rm{kW}/ \rm{L}}$</tex-math> </inline-formula> power density, superior to present Si-device-based chargers. In addition to GaN HEMTs with fast-switching transitions yielding high efficiency, the proposed charger employs the dc/dc stage to control the power factor and power delivery simultaneously, yielding little dc-bus capacitance and thereby high power density. To secure the soft switching for all switches within full voltage and power ranges, a variable switching frequency control with dual phase shifts was adopted at high power, and a triple phase shift was employed to improve the power factor at low power. Both control strategies accommodated the wide input range (80–260 VAC) and output range (200–450 VDC). A closed-loop control for the three-phase charger was realized to minimize the output current ripple and balance the power among three single-phase modules. Experimental results validated this design.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/498d2aaa209940c40ed5e0dabdd0c86a2b832e8b
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In Automotive Engineering
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Citations in the corpus
- A Review of Bidirectional On-Board Chargers for Electric Vehicles (2021, background): “Therefore, it can use components with a lower current ratings [40], [41].”