1. A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC-DC Converter for V2G Application
- Author
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Kaushik Basu, Ned Mohan, Nathan Weise, Rohit Baranwal, and Dibakar Das
- Subjects
Electrolytic capacitor ,Materials science ,business.industry ,020208 electrical & electronic engineering ,Electrical engineering ,Energy Engineering and Power Technology ,020302 automobile design & engineering ,Transportation ,High voltage ,02 engineering and technology ,Power factor ,AC power ,Battery charger ,0203 mechanical engineering ,Three-phase ,Automotive Engineering ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,business ,Galvanic isolation ,Electrical Engineering ,Power density - Abstract
In vehicle-to-grid applications, the battery charger of the electric vehicle (EV) needs to have a bidirectional power flow capability. Galvanic isolation is necessary for safety. An ac-dc bidirectional power converter with high-frequency isolation results in high power density, a key requirement for an on-board charger of an EV. Dual-active-bridge (DAB) converters are preferred in medium power and high voltage isolated dc-dc converters clue to high power density and better efficiency. This paper presents a DAB-based three-phase ac-dc isolated converter with a novel modulation strategy that results in: 1) single stage power conversion with no electrolytic capacitor, improving the reliability and power density; 2) open-loop power factor correction; 3) soft-switching of all semiconductor devices; and 4) a simple linear relationship between the control variable and the transferred active power. This paper presents a detailed analysis of the proposed operation, along with simulation results and experimental verification.
- Published
- 2019