Abstract— This paper extends the traditional family of PWM DC-DC converters. By employing voltage capacitor-multipliers, converters provide high voltage gains. The capacitor multiplier of each converter is driven by the same transistor of the well-known basic topology. The main features of these new converters are: (i) high-voltage gain without extreme duty cycles and transformerless. Therefor...

Many class B designs can be operated in class A at low power levels if the quiescent current is increased. However, this often worsens the distortion characteristics of the output stage, particularly at intermediate (and audibly important) power levels, by displacing the crossover point to a region where the transfer slope is much steeper, and the crossover discontinuity therefore much more pro...

Multilevel voltage source inverters offer several advantages compared to their conventional counterparts. By synthesising the AC output terminal voltage from several levels of voltages, staircase waveforms can be produced, which approach the sinusoidal waveform with low harmonic distortion, thus reducing filter requirements. The need of several sources on the DC side of the converter makes mult...

A new transformerless buck–boost converterwith simple structure is proposed in this study. Comparedwith the traditional buck–boost converter, the proposedbuck–boost converter’s voltage gain is squared times of theformer’s and its output voltage polarity is positive. Theseadvantages enable it to work in a wider range of positiveoutput. The two power switches of the proposed buck–boost converter ...

A novel procedure for explicit construction of the entries of real symmetric matrices with assigned spectrum and the entries of the corresponding orthogonal modal matrices is presented. The inverse eigenvalue problem of symmetric matrices with some specific sign patterns including hyperdominant one is explicitly solved too. It has been shown to arise thereof a possibility of straightforward sol...

This paper discusses the design of controller for transformerless uninterruptible power supply (UPS), with simultaneous ac and dc loading. The objective of the design is to maintain good regulation of the ac and dc voltages and sinusoidal inductor currents simultaneously. The volt-second balance across the output filter inductor is used to maintain the current in sinusoidal form which is the un...

In today’s and future’s electrical power grid system, regenerative energy sources like photovoltaic (PV) power systems consisting of PV panels and grid-connected inverters are very popular in domestic as well as in commercial power plants. High competitive pressure among PV power system providers due to cut inverter’s costs can be observed. Therefore different technical approaches have to be ev...

To eliminate the common-mode leakage current in the transformerless photovoltaic system, an improved high efficiency inverter H6 type configuration with Z-source is presented. The Z-source network can perform boost as well as sustained shoot through operation. Also, the improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to complet...

A proprietary data monitoring receiver has been integrated into the single phase solar inverter and aggregates the power optimizer performance data from each. single phase solar inverter price A single-phase grid connected transformerless photovoltaic PV inverter for. ABSTRACT In this paper the issue of control strategies for single-stage photovoltaic PV inverter is addressed. single phase pv i...