Novel 9-Steps Automatic AC Voltage Regulator based on Two Step-down Transformers

A Novel Dynamic Voltage Regulator with a Multi-level AC/AC Converter

This article proposed a novel topology of dynamic voltage regulator using transformer and PWM multi-level AC/AC converter. In this paper for finding the best value of duty ratio for switches to minimize the THD, the GA algorithm has been used and THD output voltage is assumed to be fitness function. The proposed voltage regulator employs multi-level AC/AC converter to generate compensation volt...

AC-AC Voltage Regulator Conditioning Converter with Three Control Schemes

In this paper, a comparative study of modified phase-angle, extinction-angle, and pulse width modulation control techniques for the purpose of power factor improvement of single-phase AC-AC voltage regulators have been illustrated as applied to a singlephase ac voltage converter by an example of the widely used single-phase induction motor as a dynamic load. Observations on power factor, displa...

A Three-phase AC-Voltage Regulator System

Three-phase AC-voltage regulatior systems using silicon controlled rectifier (SCR) have been broadly applied in industrial field.This paper introduces a novel design of three-phase AC-voltage regulation trigger circuitry with SCR and STM32 microcontroller, and presents its application in an energysaving design of oil extractor control system. This design employs photoelectric isolation techniqu...

AC Circuits with Transformers

A Step-Up/Step-Down Switched-Capacitor AC-AC Converter with Symmetrical Topology

In this paper, a new step-up/step-down AC-AC converter is designed by switched capacitor (SC) techniques. The main features of the proposed SC AC-AC converter are the symmetrical converter topology and the absence of magnetic elements. Owing to the symmetrical converter topology, the number of capacitors in the proposed AC-AC converter is fewer than that in the conventional SC AC-AC converter. ...