Generally, power electronic converters are designed to obtain the highest efficiency at rated while they most often operated under partial loading conditions. For dual active bridge converters, zero-voltage-switching (ZVS) conditions can be impaired light load situations. While depending ZVS operation has been introduced by prior-art approaches, nonlinear characteristic of output capacitance in...

We have developed a new isolated AC/DC converter for electric vehicle on-board chargers. It consists of an AC/DC converter with Gradationally Controlled Voltage Inverter (GCVI AC/DC converter) and an isolated Zero-Voltage-Switching (ZVS) DC/DC converter, each of which is optimally controlled to convert in a highly efficient means. As a result, the new on-board charger has achieved a power conve...

In this article, a three winding coupled inductor-based dual active bridge (TWCI DAB) dc-dc converter is proposed. Similar to the current-fed DAB converter, proposed TWCI has small input current ripple and wide voltage range. addition, zero-voltage switching (ZVS) of all switches in full load range under variation can be realized. With magnetic integration structure, size total magnetics reduce...

This paper presents a novel high step-down DC-DC converter based on switched-capacitor resonant topology. It is presented in 48/8 V version, which was verified by simulations and experiments. The most notable features specific to this are an almost non-iductive design relatively low voltage stress across switching devices. proposed topology allows for zero-current-switching (ZCS) zero-voltage-s...

This paper aims to design a PID compensator for the control of Synchronous Rectifier (SR) Buck Converter to improve its conversion efficiency under different load conditions. Since the diode rectifier is replaced by a high frequency MOSFET switch, the SR control method itself will be sufficient under heavy load condition, to attain better normal mode performance. However, this technique does no...

In this paper, a novel zero voltage transition (ZVT) pulse width modulation (PWM) DC-DC interleaved boost converter with an active snubber cell is proposed. All of the semiconductor devices in the converter turn on and off with soft switching to reduce the switching power losses and improve the overall efficiency. Due to interleaved approach, the current stresses of main devices, the ripple of ...

A self core reset and zero voltage switching (ZVS) forward converter topology is presented in this paper. By employing a simple auxiliary circuit, the proposed topology is able to achieve self reset of the power transformer without the use of the conventional tertiary reset winding, and its main switch can be turned on and turned off under ZVS independent of line and load conditions. This simpl...