This paper proposes a new ZCS non-isolated bidirectional buck-boost DC-DC converter for energy storage applications. The conventional bidirectional converter was derived with auxiliary resonant cell to obtain ZCS turn-on/turn-off condition of the main switches. The proposed converter was operated in boost and buck modes with soft-switching operations in order to minimize the current stresses and switching losses, because the resonating current for the zero current switching does not flow through the main switches. The converter has an improved overall efficiency than the hard-switching converter, for high power energy storage applications. This paper mainly describes the operation principles of the proposed topology and experimental verification of theoretical analysis of the simulation results.

A new ZVS-ZCS bidirectional DC-DC converter is proposed, which provides high output voltages 80v-180v. With proposed ZVS-ZCS concept, the MATLAB simulation results of the application to a fuel cell and battery application have been obtained and compared with those of ZVS bidirectional and applications in order to show the excellent performance of the proposed concept. In addition to this experimental setup has been developed. The experimental results are compared with the simulation results.

This paper deals with a new ZCS bidirectional buck-boost converter for the energy storage applications. The conventional buck-boost converter is upgraded with an auxiliary resonant circuit to obtain the zero current switching during commutation of main IGBTs. The key advantage of this proposed topology has the reduced switching losses, as all the switching devices are operated in ZCS soft-switching operation. This paper largely focused on analysis and simulation evaluation of the boost and buck mode operations with soft-switching. This paper describes the operation principles and simulation results of the converter to verify the theoretical assumptions and its performance.

This paper proposes a bidirectional DC–DC converter with soft‐switching capabilities. The main characteristic of this converter is that it can be operated in both boost and buck modes. The major advantages of this converter are high efficiency and reduced switching loss in high‐power and high‐voltage applications. The soft‐switching capability is obtained by additional dual auxiliary resonant circuits connected to the conventional non‐isolated bidirectional DC–DC converter. Except for the auxiliary switches, all main switches turn on with zero‐voltage switching in this proposed bidirectional DC–DC converter. The auxiliary switches turn off with zero current transition. The principle of operation, theoretical analysis and experimental results of a 175 V/385 V bidirectional DC–DC converter at 2 kW output power with switching frequency of 50 kHz are provided. The experimental results verified the zero‐voltage switching operation for boost and buck modes with efficiencies 96.5% and 96%, respectively, at full load.