Abstract:In this paper, to solve the hard-switching operation problem and the lack of existing a bidirectional power flow path from output to the energy storage device of the conventional three-port converter, a new soft-switched bidirectional multi-port converter is proposed. A large number of switches, different power flow paths which vary in each operating mode, and changing the outputs and their power levels are some of the challenges to provide soft-switching conditions in multi-port converters. In the proposed co… Show more
“…Replacing fossil fuel-based power generation with renewable and emission-free resources is exceedingly prevalent in both developed and developing countries [1]. Renewable-based systems require special considerations, systems, and provisions.…”
An ultra-high gain DC-DC converter with single-switch structure is introduced in this paper. Full soft-witching is provided by simultaneous use of quasi-resonant performance of one resonant tank and leakage inductance of a three-winding coupled inductor (CI). Adopting the secondary and tertiary windings of the CI in separated voltage multiplier cells enables the converter to provide ultra-high voltage gain. The reverse recovery problem is resolved thanks to the quasi zero current switching performance of nearly all diodes, especially output diode because of the second resonant tank, so the total electromagnetic interference is significantly reduced. Continuous input current with low ripple expands the application of the proposed converter, especially in renewable energy applications. Steady-state performance and design considerations of the introduced converter are analyzed thoroughly and compared with recently introduced converters to establish its merits. Experimental results of a 200 W prototype are given to validate its analysis and performance.INDEX TERMS DC-DC power converter, Coupled inductor, full soft-switching, single switch structure, ultra-high step-up converter.
“…Replacing fossil fuel-based power generation with renewable and emission-free resources is exceedingly prevalent in both developed and developing countries [1]. Renewable-based systems require special considerations, systems, and provisions.…”
An ultra-high gain DC-DC converter with single-switch structure is introduced in this paper. Full soft-witching is provided by simultaneous use of quasi-resonant performance of one resonant tank and leakage inductance of a three-winding coupled inductor (CI). Adopting the secondary and tertiary windings of the CI in separated voltage multiplier cells enables the converter to provide ultra-high voltage gain. The reverse recovery problem is resolved thanks to the quasi zero current switching performance of nearly all diodes, especially output diode because of the second resonant tank, so the total electromagnetic interference is significantly reduced. Continuous input current with low ripple expands the application of the proposed converter, especially in renewable energy applications. Steady-state performance and design considerations of the introduced converter are analyzed thoroughly and compared with recently introduced converters to establish its merits. Experimental results of a 200 W prototype are given to validate its analysis and performance.INDEX TERMS DC-DC power converter, Coupled inductor, full soft-switching, single switch structure, ultra-high step-up converter.
“…In comparison to other converters, the coupled inductor with a bidirectional converter for a single magnetic core electric vehicle application demands a lower volume of size as shown in Fig. 13 [ 69 ]. The voltage gain can be written as: Fig.…”
Section: Converter Classification Of Battery and Plug-in Hybrid Elect...mentioning
“…Because the suggested topology can independently control the inputs from each other with low normalized voltage stress across power semiconductors. For this reason, the efficiency of the proposed converter is suitable for different power levels [24][25][26].…”
Here, a new bidirectional multi‐input‐multi‐output (B‐MIMO) high step‐up DC/DC converter with lower losses on switch/diode is proposed as suitable for electric vehicles. The proposed topology consists of five inputs and two outputs and the battery (energy storage) is considered one of the inputs. Due to the bidirectional nature of the proposed topology, different scenarios of it are described. In discharging mode, the stored energy of the battery is transferred to the output loads. In charging mode, the surplus energy by regenerative braking will be responsible for charging the battery in the related scenario. Also, each input can charge the battery separately in different scenarios. In general, the proposed topology is capable to work in different scenarios for bypassing/charging/discharging the battery. Other advantages of the proposed topology include continuous current of all the inputs, independent control of inputs from each other and lower normalized voltage stress on semiconductors. These features make the proposed bidirectional MIMO DC/DC converter (B‐MIMO‐C) suitable for electric vehicle applications. The proposed topology operation is provided in the laboratory testing for 870W prototype, and the obtained results confirm the theoretical calculations as well.
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