This paper proposes a sliding-mode controller to ensure both the global stability and maximum power generation of photovoltaic system based on flyback converter. The is an adaptive sliding-surface, which designed impose constant frequency switching converter, thus simplifying selection passive active elements device. Moreover, analyzed using transversality, reachability equivalent control condi...

The inconsistency of the battery pack will cause “barrel effect“ when is working. with lower power first reach discharge cut-off condition, resulting in not being fully discharged, reducing utilization rate. This paper uses state charge (SOC) as an equilibrium variable and forgetting factor recursive least square–extended Kalman filter (FFRLS-EKF) method to estimate SOC. Using a balanced topolo...

This paper proposes a novel high-efficiency isolated three-port bidirectional DC/DC device for photovoltaic (PV) systems. The device contains a high step-up converter for PV modules to supply power to the DC bus, and a bidirectional charge/discharge control circuit for the battery with an improved boost-flyback converter. When the PV modules supply sufficient energy, their output can be stepped...

An active clamped forward-flyback converter comprizing a current doubler scheme, which allows to boost the application range of MOSFETs for efficient rectification in low-voltage power supplies, is investigated first approximatively and second incl. commutations. Design equations and issues are given for the magnetical integration of filter inductors on the outer core legs of the transformer . ...

The design and development of a synchronous pulse-width modulation (PWM) generator suitable for the three-phase flyback converter is presented. The design is based on the Xilinx chip XC4005E field programmable gate array (FPGA). Two 30" of sine waveforms with two different carrier waveforms are used to generate the PWM. The PWM pattern proposed occupies less FPGA block cell, hence more space ca...

Yoshihiro Konishi, Member (Fuji Electric Co., Ltd.) Mutsuo Nakaoka, Member (Yamaguchi University) This paper presents a novel type flyback DC-DC converter using snubber energy regenerative circuit. The proposed snubber regenerative circuit consists of passive circuit components such as auxiliary transformers, inductors, capacitors and diodes, and has a high reliability. The operation principle ...

A novel asymmetrical interleaved dc/dc switching converters family intended for photovoltaic and fuel cell applications is presented in this paper. The main requirements on such applications are small ripples in the generator and load, as well as high voltage conversion ratio. Therefore, interleaved structures and voltage multiplier cells have been asymmetrically combined to generate new conver...