Non-isolated Bidirectional DC-DC Research Articles

A novel non-isolated three-port bidirectional DC-DC converter for off-grid solar-powered charging for electric and hydrogen vehicles using STM32 microcontroller

A novel non-isolated three-port bidirectional DC-DC converter for off-grid solar-powered charging for electric and hydrogen vehicles using STM32 microcontroller

Non-isolated stacked bidirectional soft-switching DC-DC converter with PWM plus phase-shift control scheme

In this paper, a non-isolated stacked bidirectional DC-DC converter with zero-voltage-switching (ZVS) is introduced for the high step-up/step-down conversion systems. The extremely narrow turn-on and/or turn-off duty cycle existing in the conventional bidirectional buck-boost converters can be extended due to the stacked module configuration for large voltage conversion ratio applications. Furthermore, the switch voltage stress is halved because of the series connection of half bridge modules. The PWM plus phase-shift control strategy is employed, where the duty cycle is adopted to regulate the voltages between the input and output sides and the phase-shift angle is applied to achieve the power flow regulation. This decoupled control scheme can not only realize seam-less bidirectional transition operation, but also achieve adaptive voltage balance for the power switches. In addition, ZVS soft-switching operation for all active switches is realized to minimize the switching losses. Finally, a prototype of 1 kW operating at 100 kHz is built and tested to demonstrate the effectiveness of the proposed converter and the control strategy.

Analysis of Non-Isolated Bidirectional Active Clamped DC-DC Converter for PV and Battery Integrated Systems

Analysis of Non-Isolated Bidirectional Active Clamped DC-DC Converter for PV and Battery Integrated Systems

Analysis of Non-Isolated Bidirectional Active Clamped DC-DC Converter for PV and Battery Integrated Systems

Background/Objective: A novel soft switching technique is implemented in a Bidirectional DC-DC converter by using an Active clamped Auxiliary switch and in turn it achieves continuous current of inductor and operates at constant frequency is used to turn ON and turn OFF the switches. Methods/Statistical Analysis: The Power electronics converter systems have DC bus voltages they are connected to batteries or supercapacitors. Bidirectional converters which are connected to battery, supercapacitor allows them to charge or discharge. A new soft switching Bi-directional direct current to direct current converter is presented in this paper. This converter is operated in zero voltage and zero current switching, continuous inductor current and constant frequency that frequency is used to turn ON and turn OFF the switches. The switching stresses are reduced in this proposed method by auxiliary switches compared to traditional methods. The simulation results are obtained by using MATLAB software in this paper. Findings: The proposed converter is implemented by using an Auxiliary switch with soft switching technique. The output is ripple free DC voltage of 63.5V. Improvements: The Bidirectional Converter will operate at continuous inductor current also with less ripples in output voltage.