Analysis and Design of a Non-Isolated Bidirectional ZVS-PWM Active Clamped DC-DC Converter

Abstract

A new soft-switched bidirectional dc-dc converter is proposed in the paper. The proposed converter can operate with soft-switching, a continuous inductor current, fixed switching frequency, and the switch stresses of a conventional PWM converter regardless of the direction of power flow. These features are due to a very simple auxiliary circuit that is operational regardless of the direction of power flow. In the paper, the operation and design of the converter are discussed and its feasibility is confirmed with experimental results obtained from a prototype.

Bidirectional Resonant DC-DC Converter for Microgrid applications

“…The converter [10] mentioned has a high-frequency operation, but the use of coupled inductors leads to complications in design. For a broad range of load demands, the suggested topology is used in [11]. A high performance and step-up / step-down ratio converter is suggested in [15], but limitations include the use of coupling inductor and restricted frequency difficult switching.…”

“…To achieve high-frequency switching, high power density of the DC-DC converter is crucial. Reported previously, the bidirectional converter topologies have a high operating frequency along with high switching capacity and high effectiveness but have constraints in either step-up or step-down ratios [10][11][12][13][14].…”

A control method to improve the efficiency of a soft-switching non-isolated bidirectional DC-DC converter for hybrid and plug-in electric vehicle applications

“…In many previous papers (Das et al, 2009;Chau et al, 1998;Aamir and Kim, 2011), adding auxiliary switches, inductors and capacitors is used to achieve ZVS and ZCS conditions, but high voltage and current stresses of power switches are also generated. Zhang et al (2007) and Ni et al (2010) adopted interleaved structures to achieve ZVS conditions.…”

Bidirectional Resonant DC-DC converter for Microgrid Applications

“…1549 changing isolated transformer turn ratios, such as flyback-type, forward-flyback-type [19][20]. Non isolated converters operating at extreme duty cycle in either direction to achieve high step up/step down ratio leads to extreme stress on devices, resulting in large reverse recovery loss and high EMI issues.…”