Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 33, Issue 11, Pages 9459-9469Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2017.2788436
Keywords
Bidirectional dc-dc converter (BDC); electric vehicles (EVs); hybrid energy source system (HESS); switched-capacitor; synchronous rectification; wide voltage-gain range
Categories
Funding
- National Natural Science Foundation of China [51577130]
- Research Program of Application Foundation and Advanced Technology of Tianjin China [15JCQNJC03900]
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A switched-capacitor bidirectional dc-dc converter with a high step-up/step-down voltage gain is proposed for electric vehicles with a hybrid energy source system. The converter presented has the advantages of being a simple circuit, a reduced number of components, a wide voltage-gain range, a low voltage stress, and a common ground. In addition, the synchronous rectifiers allow zero voltage switching turn-on and turn-off without requiring any extra hardware, and the efficiency of the converter is improved. A 300 W prototype has been developed, which validates the wide voltage-gain range of this converter using a variable low-voltage side (40-100 V) and to give a constant high-voltage side (300 V). The maximum efficiency of the converter is 94.45% in step-down mode and 94.39% in step-up mode. The experimental results also validate the feasibility and the effectiveness of the proposed topology.
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