Increasing the voltage gain by means of Z-source network will provide some features such as low-voltage stress semiconductor devices, low duty cycle switch and reverse recovery problem output diode that leads to improve converter performance efficiency. The proposed in this paper employs a with coupled inductors integrated flyback make it appropriate for high step-up applications. One magnetic ...

This paper proposes a single stage alternating current/direct current (AC/DC) flyback converter which contains three output windings with synchronous rectification (SR) function to achieve better cross-regulation and efficiency. Because the are stacked in series structure use instead of diode rectification, forward conduction loss can be eliminated, each winding flow bilaterally. Therefore, ene...

A new family of ac–dc converters is derived which integrate the functions of low-harmonic rectification, low-frequency energy storage, and wide-bandwidth output voltage control into a single converter containing one, two, or four active switches. These converters utilize a discontinuous conduction mode input inductor, an internal energy storage capacitor, and transformer secondary circuits whic...

The NCL30001 is a highly integrated controller for implementing power factor correction (PFC) and isolated step down ac−dc power conversion in a single stage, resulting in a lower cost and reduced part count solution. This controller is ideal for LED Driver power supplies with power requirements between 40 W and 150 W. The single stage is based on the flyback converter and it is designed to ope...

In this paper, a QR flyback converter using self-driven active snubber (SDAS) was proposed to solve the problem of voltage surge in switch converters. converter, SDAS consisting clamping capacitor and an can be configured parallel with main or transformer reduce switch. To confirm steady-state characteristics which is applied, equivalent circuits for each state were constructed, equations deter...

Starting strategies were investigated for a three-phase single-stage power factor correction (PFC) converter. Starting process and mechanism of input over current was analyzed in detail. A lossy method was proposed and designed in which a resistor was connected in series with the filter capacitor to increase effective value of output voltage. Based on them, the boost inductors were replaced by ...