A circuit configuration of a single-phase nonisolated online uninterruptible power supply (UPS) with 110-V/220-V input–output voltage ratings is proposed, allowing the bypass operation without a transformer even if the input voltage is different from the output voltage. The converter consists of an ac–dc/dc–dc three-level boost converter combined with a double half-bridge inverter. In this type...

We study the steady-state behavior of a damped, driven nonlinear LRC oscillator, where the nonlinearity arises due to voltage-dependent capacitance. The driving or input signal is assumed to be a pure tone. Using an iterative, perturbative solution technique combinedwith an energy conservation argument, we show that the oscillator transfers energy from the fundamental to higher harmonics. We de...

A nonlinear system may be characterized by an orthogonal functional power series (FPS) computed from cross correlations between input and output variables. \Is the response changing over the course of the experiment?" is a fundamental question encountered in the analysis of both FPS and evoked potentials (EP's). Regression on closed-form functions of time produces a time-varying FPS or EP. Eval...

This paper describes the output voltage regulation control for an interleaved connected to a direct current (DC) microgrid considering bidirectional flows. The proposed controller is based on interconnection and damping passivity-based (IDA-PBC) approach with integral action that regulates profile at its assigned reference. designs law via nonlinear feedback ensures asymptotic stability in clos...

the cúk converter, which has voltage buck and boost ability, offers high flexibility as an interface device for solar panels. in addition, current ripple can be more reduced because of two input and output inductors at both sides. this paper presents a new application of current-variable inductors in a cúk converter that reduces the size and capacity of storage elements. because of two inductor...

In this article, a new non-isolated interleaved DC–DC converter is proposed to provide high voltage conversion ratio in renewable energy systems. The configuration composed of two-phase boost integrating voltage-lift capacitor and three-winding coupled inductor-based multiplier modules achieve step-up reduce stresses on the semiconductors (switches diodes). can when working at proper duty ratio...

This article compares the conventional model predictive control (MPC) and active disturbance rejection (ADRC) with a novel MPADRC technique for controlling non-minimum phase behavior in DC–DC boost converter. The of converter is challenging as it nonlinear, shows continuous conduction mode (CCM). Moreover, this article, comparison presented two-phase interleaved using MPC ADRC, effectiveness in...