This paper proposes an improved control method based on modified Delta-Sigma Modulator (DSM) to enhance transient response and improve harmonic contents of buck DC-DC converter. The main advantages of the proposed method are improving the output voltage frequency spectrum, correction of the output voltage harmonic contents and sideband harmonics, reduction of switching noise peaks at the output...

This paper designs a novel smooth super-twisting extended-state observer (SSTESO)-based sliding-mode control (SSTSMC) scheme to promote the robust ability and voltage-tracking performance of DC-DC buck converters. First, an SSTESO is proposed estimate unknown lumped disturbance compensate for estimation voltage controller. The realized by constructing function replace nonlinear sign in STESO, w...

In this paper, we provide an analytical insight into the observed nonlinear behaviour of the buck converter and link this with the study of a wider class of piecewise-smooth systems. After introducing the buck converter model and background, we describe the most fascinating features of its dynamical behaviour. We then introduce the so-called grazing and sliding solutions and discuss their role ...

In recent years, power converters are used to get high power factor for low power applications. In this work, the design and development of a DC-DC Converter using two stage buck–boost converter with isolation operation as high-power-factor offline power supply for power-LED lamps is discussed. This converter is suitable for low power application such as a matrix LED lighting system. The advant...

This paper describes a new design for direct sliding mode method with a high switching frequency using the PD-PI type sliding surface applied to a negative output Luo converter worked in continuous current mode for applications required constant power source such as aerospace applications, medical equipment and etc. Because of the output power and line changes, the converter model is also nonli...

Most mobile equipments use battery as power source. The increasing use of low voltage portable devices and growing requirements of functionalities embedded into such devices. Thus an efficient power management technique is needed for longer battery life for them. Given the highly variable nature of batteries systems often require supply voltages to be both higher and lower than the battery. Thi...

This paper describes the design and development of a novel controller for a non-linear power electronic converter. Neuro-Fuzzy controller is proposed to improve the performance of the buck &boost converters. The duty cycle of the buck & boost converters are controlled by NeuroFuzzy controller. The conventional PI controllers for such converters, designed under the worst case condition of maximu...

This paper addresses the new method for output voltage regulation of DC–DC buck converter nonlinear systems by a sampled-data linear parameter varying (LPV) controller. For this purpose, an output-error state-space affine LPV model is presented systems. The structure controller considered as time delay in input, and stabilization conditions are obtained with dependence on using parameter-depend...

The DC transfer functions for the buck, boost, and Cuk PWM DC-DC converters in continuous conductionmodearell, l / ( l D ) , and-D/( l -D) respectively, ,where D is the duty cycle. Therefore. it is reasonable to expect that the Cuk PWh4 DC-DC converter circuit [l] can be synthesized by cascading boost and buck converter circuits. The purpose of this paper is to present a systematic and rigorous...

A Power Factor Correction Using singleinductor dual-output buck-boost converter operating in critical conduction mode is proposed in this paper. Each output of the SingleInductor Dual-Output buck-boost converter can be regulated independently by multiplexing a single inductor, Compared with a conventional two-stage multiple-output converter, the singleinductor dual-output buck-boost converter b...