Abstract
The DC/DC converters and DC/AC inverters based on silicon carbide (SiC) devices as battery interfaces, motor drives, etc., in electric vehicles (EVs) benefit from their low resistances, fast switching speed, high temperature tolerance, etc. Such advantages could improve the power density and efficiency of the converter and inverter systems in EVs. Furthermore, the total powertrain system in EVs is also affected by the converter and inverter system based on SiC, especially the capacity of the battery and the overall system efficiency. Therefore, this paper investigates the impact of SiC on the powertrain systems in EVs. First, the characteristics of SiC are evaluated by a double pulse test (DPT). Then, the power losses of the DC/DC converter, DC/AC inverter, and motor are measured. The measured results are assigned into a powertrain model built in the Advanced Vehicle Simulator (ADVISOR) software in order to explore a direct correlation between the SiC and the performance of the powertrain system in EVs, which are then compared with the conventional powertrain system based on silicon (Si). The test and simulation results demonstrate that the efficiency of the overall powertrain is significantly improved and the capacity of the battery can be remarkably reduced if the Si is replaced by SiC in the powertrain system.
Highlights
Because of the global energy crisis and environmental pollution, the past decade has witnessed the rapid development of new energy vehicle technologies, such as Electric Vehicles (EVs), Hybrid ElectricVehicles (HEVs), Plug-in Hybrid Electric Vehicles (PHEVs), etc
The main challenge of EVs/Hybrid ElectricVehicles (HEVs)/PHEVs development remains the limited cruising range due to the small battery capacity and the long charging times according to the available battery charging technologies, especially for pure electric vehicles [3,4,5,6,7]
This paper comprehensively investigated the impact of silicon carbide (SiC) power devices on the powertrain of EVs
Summary
Because of the global energy crisis and environmental pollution, the past decade has witnessed the rapid development of new energy vehicle technologies, such as Electric Vehicles (EVs), Hybrid Electric. Plussystem, an inverter, onin devices provide higher efficiency and consists higher power conductivity, etc., which arebased shown. This paper comprehensively investigates the impact of SiC on the powertrain systems the efficiency of the Si-inverter is 97.1%. The impact of SiC on the overall-powertrain system has not been losses of the DC/DC converter, DC/AC inverter, and motor are tested. SiC results are compared with the conventional powertrain system losses ofsystem the DC/DC converter, inverter, and motor are tested.
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