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ECWAY TECHNOLOGIES 
IEEE PROJECTS & SOFTWARE DEVELOPMENTS 
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE 
BANGALORE / HYDRABAD 
CELL: 9894917187 | 875487 1111/2222/3333 | 8754872111 / 3111 / 4111 / 5111 / 6111 
Visit: www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com 
A HIGH-DENSITY, HIGH-EFFICIENCY, ISOLATED ON-BOARD VEHICLE 
BATTERY CHARGER UTILIZING SILICON CARBIDE POWER DEVICES 
ABSTRACT: 
This paper presents an isolated on-board vehicular battery charger that utilizes silicon carbide 
(SiC) power devices to achieve high density and high efficiency for application in electric 
vehicles (EVs) and plug-in hybrid EVs (PHEVs). The proposed level 2 charger has a two-stage 
architecture where the first stage is a bridgeless boost ac–dc converter and the second stage is a 
phaseshifted full-bridge isolated dc–dc converter. The operation of both topologies is presented 
and the specific advantages gained through the use of SiC power devices are discussed. The 
design of power stage components, the packaging of the multichip power module, and the 
system-level packaging is presented with a primary focus on system density and a secondary 
focus on system efficiency. In this work, a hardware prototype is developed and a peak system 
efficiency of 95% is measured while operating both power stages with a switching frequency of 
200 kHz. A maximum output power of 6.1 kW results in a volumetric power density of 5.0 kW/L 
and a gravimetric power density of 3.8 kW/kg when considering the volume and mass of the 
system including a case.

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A high density, high-efficiency, isolated on-board vehicle battery charger utilizing silicon carbide power devices

  • 1. ECWAY TECHNOLOGIES IEEE PROJECTS & SOFTWARE DEVELOPMENTS OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111/2222/3333 | 8754872111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com A HIGH-DENSITY, HIGH-EFFICIENCY, ISOLATED ON-BOARD VEHICLE BATTERY CHARGER UTILIZING SILICON CARBIDE POWER DEVICES ABSTRACT: This paper presents an isolated on-board vehicular battery charger that utilizes silicon carbide (SiC) power devices to achieve high density and high efficiency for application in electric vehicles (EVs) and plug-in hybrid EVs (PHEVs). The proposed level 2 charger has a two-stage architecture where the first stage is a bridgeless boost ac–dc converter and the second stage is a phaseshifted full-bridge isolated dc–dc converter. The operation of both topologies is presented and the specific advantages gained through the use of SiC power devices are discussed. The design of power stage components, the packaging of the multichip power module, and the system-level packaging is presented with a primary focus on system density and a secondary focus on system efficiency. In this work, a hardware prototype is developed and a peak system efficiency of 95% is measured while operating both power stages with a switching frequency of 200 kHz. A maximum output power of 6.1 kW results in a volumetric power density of 5.0 kW/L and a gravimetric power density of 3.8 kW/kg when considering the volume and mass of the system including a case.