26-07-2014, 11:32 AM
Single Phase to Three Phase Converter
Single Phase to.doc (Size: 27.5 KB / Downloads: 9)
Abstract
A new single phase to three phase converter topology for small industries is presented in this paper: Phase converter, include this paper, is a new technology that supplies three phase
power from a single phase source to power inductive, resistive and capacitive loads with distinct advantages over any existing converter technology. The converter consists of DC power supply, a MOSFET Hex-bridge, integrated gate drive IC, and a DSP to generate the switching signals. The switching signals generated are a unique version of selective harmonic elimination, which produces a consistent starting point for the switching functions, independent of the number of harmonics eliminated This converter covers the basis of induction motors and different types of other motors. They are ideal for farms, workshops, garages
and large building etc.
Introduction
A wide variety of commercial and industrial electrical equipment requires three-phase power. Electric utilities do not install three-phase power as a matter of course because
it costs significantly more than single-phase installation. As an alternative to utility installed three-phase, rotary phase converters, static phase converters and phase converting
Variable frequency drives (VFD) have been used for decades to generate three-phase power from a single-phase source. Construction of three-phase power lines can cost as much as
$50,000 per mile and can have an undesirable environmental impact. Even when three-phase lines are nearby, the cost of installation is considerable. Based on anticipated electricity
demand for the three-phase application, the utility mayor may not charge the customer for the cost of installation. Continuing monthly surcharges for the service are also common. Phase
Converters have historically been employed where utility three-phase power was unavailable, or where the electricity demand did not justify the cost of utility three-phase installation. Reduced motor life caused by voltage and current imbalance, harmonics that pollute the power grid and damage equipment, or the inability to operate sensitive equipment or
multiple loads are just some of the problems that have limited the use of phase converters. This phase converter is a new, patented technology that supplies three-phase power from a
single phase source to power inductive, resistive and capacitive loads with distinct advantages over any existing converter technology.