This article proposes a sinusoidal phase shift modulation for a single-stage (1-S) L-L type, electrolytic capacitorless, current-fed bidirectional converter during vehicle-to-home (V2H) operation. On the ac side, there is a current-fed half-bridge converter (CFHB), and on the dc side, there is a voltage-fed full-bridge converter (VFFB). The ac and dc side converters are isolated by a high-frequency transformer (HFT). DC-side bulky electrolytic capacitors have been replaced with small film capacitors to filter out switching frequency current ripple and allow sinusoidal ripple current (SRC) charging. A simple control architecture regulates the output ac voltage for residential loads in V2H operational mode. The proposed modulation, along with a seamless transition to V2H operational mode in the event of a grid outage, is experimentally validated in a developed 1.5 kW laboratory prototype. Furthermore, with the proposed modulation technique, the presented 1-S onboard charger (OBC) can achieve zero voltage switching (ZVS) and zero current switching (ZCS) under wide ac and battery voltage ranges resulting in high efficiency across loading conditions.
Sinusoidal Phase Shift Modulation for V2H Operational Mode in Current-Fed Bidirectional Onboard Charger
IEEE Transactions on Transportation Electrification ; 10 , 2 ; 3181-3191
2024-06-01
15784648 byte
Article (Journal)
Electronic Resource
English