This article studies the new benefits that partial power processing (PPP) brings to silicon (Si) devices compared to wide bandgap (WBG) technologies. To prove this, the proposed case study consists of an onboard charger (OBC) application in which a Si-based partial power converter (PPC) is compared with a silicon carbide (SiC)-based full power converter (FPC). The OBC application considers three different technologies of lithium-ion batteries and the main comparison metrics are: semiconductor switching, temperature rise of semiconductors, volume, and device losses (efficiency). This last one is oriented to energy losses (Wh) and not to power losses (W) as classical design. An analytical model is used to compute switching and conduction losses. Depending on the operating point, switching events are segregated into zero voltage switching (ZVS), incomplete ZVS (iZVS), and hard switching. It is shown that the Si-based PPC may enter non-ZVS in certain operating conditions. However, its efficiency remains above 99%, producing up to five times lower energy losses than the SiC-based FPC. Also, the case temperature of the semiconductors is halved and a reduction in the volume and electrical stress of the devices is achieved. This permits a global multiobjective optimization. The results are experimentally validated using a 3-kW prototype of SiC-based FPC and Si-based PPC.
Performance Improvement of a Silicon Partial Power Converter Over a Silicon Carbide Full Power Converter
IEEE Transactions on Transportation Electrification ; 10 , 1 ; 1680-1691
2024-03-01
11505078 byte
Article (Journal)
Electronic Resource
English
Mobile charging pile adopting silicon carbide dual-active full-bridge direct-current converter
European Patent Office | 2024
|Efficiency Improvement of Boost Converter for Fuel Cell Bus by Silicon Carbide Diodes
SAE Technical Papers | 2016
|Efficiency Improvement of Boost Converter for Fuel Cell Bus by Silicon Carbide Diodes
British Library Conference Proceedings | 2016
|POWER CONVERTER ARRANGEMENT WITH PARTIAL POWER CONVERSION
European Patent Office | 2024
|