Current-fed half bridge converter with bidirectional switches on ac side and a full dc of high frequency transformer is an optimal topology for single stage galvanically isolated ac-dc onboard vehicle charging application. AC are actively commutated to achieve zero current switching (ZCS) using phase shift modulation (SPSM) discontinuous (DCPSM). Furthermore, voltage turn-on (ZVS) achieved swit...

A Fuzzy controlled DC-DC buck converters which maintains the load for various load and line conditions is presented in this paper. Processors exhibit variation in load current dynamically from few mA to Amps during operation. In this paper efficiency optimization is carried out for light and heavy load scenarios for variations in supply by varying the duty cycle of switching device. The primary...

Light-emitting diodes (LEDs) have been widely used for various lighting applications. A high power factor single-stage single-switch driver can be used to supply LEDs without using an electrolytic capacitor. By integrating the single-ended primary inductor converter (SEPIC) and flyback converter, LED driver could achieve nearly a unity power factor and low total harmonic distortion (THD). Since...

This article presents a novel structure for high step-up DC-DC converter. The proposed converter offers several advantages, including simple structure, voltage gain, efficiency, reduced stress on the semiconductors, and fewer components. A two-winding coupled inductor has been employed to enhance output level in this topology. suggested only one power switch with low ON-state resistance (RDS-ON...

MODULARIZED MULTILEVEL AND Z-SOURCE POWER CONVERTER AS RENEWABLE ENERGY INTERFACE FOR VEHICLE AND GRID-CONNECTED APPLICATIONS By Dong Cao Due the energy crisis and increased oil price, renewable energy sources such as photovoltaic panel, wind turbine, or thermoelectric generation module, are used more and more widely for vehicle and grid-connected applications. However, the output of these rene...

This paper presents an integrated power factor correction (PFC) buck-boost buck converter based voltage source inverter (VSI) fed brushless DC motor (BLDC) drive using a single voltage sensor. The speed is controlled by controlling the DC bus voltage of the VSI. An electronic commutation of the BLDC motor is used which utilizes a fundamental frequency switching (FFS) of VSI which in-turn offers...

In this paper, the analysis and design method for suboptimum Class- $\text{E}_{\mathrm {M}}/\text{F}_{3}$ inverter (i.e., only zero-voltage switching (ZVS), zero-voltage-derivative (ZVDS), zero-current (ZCS) conditions are satisfied) ...

The trend in power converters is towards increasing power densities. To achieve this goal, it is necessary to reduce power losses, overall system size, and weight by increasing the switching frequency. High reliability is also very important for today’s switched-mode power supplies (SMPS). The zero-voltage-switching (ZVS) or zero-currentswitching (ZCS) topologies that allow for high-frequency s...

With reference to a recently published paper, the realization of line and load regulation in switched-capacitor-based converters is discussed. We point out that achieving zero-current switching at the expense of losing line and load regulation is not practically feasible. In [1], a way of realizing zero-current-switching (ZCS) in step-up switched-capacitor (SC) converters has been presented. Th...

A novel topology, Current-Fed MultiResonant DC-DC Converter (CF-MRC) was studied theoretically and experimentally. The main features of the proposed converter are an inherent protection against a short circuit at the output, a high voltage gain and zero voltage switching over a iarge range of output voitage. These characteristics make it a viable choice for the implementation of a high voltage ...