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Harmonic Silence | Phaseback Drive Voltage Stabilizer | Phaseback Surge Suppressing Voltage Stabilizer
PHASEBACK VOLTAGE STABILIZATION TO ELIMINATE THE NEED FOR TVSS
Patent # 6,888,709
The Laws of Physics do not change, however due to the constant advances in technology it is obvious that our understanding of those laws is constantly changing. Phaseback starts as a zero sequence circuit with the primary side configured in three separate windings in a wye configuration with the neutral point connected to ground. When any phase impedance to ground lowers it allows current to flow to ground. Current also flows to the neutral connection of Phaseback’s primary winding. The neutral connection to ground acts as a potential to ground sensor. When current flows to the neutral point it causes the electromagnetic interaction between the primary and the secondary of each independent transformer. Due to Phaseback’s operating at the speed of current flow transients and surges are dissipated in the same manner. Note: All graphs are from an automotive component Manufacturing Plant with a 2000KVA power transformer with a 480V Delta secondary feeding a 1600amp breaker with 800 amp connected load
The current flows back to the primary side in the path of least resistance. This can only happen with independent cores for each transformer, a single core would prevent this interaction. In order to understand the phaseback flow to the primary you have to see which phase provides the least impedance to current flow as shown in the waveform below: Phase B that offers the least resistance to flow and allows the current to bring the phase back to stabilization thus the product name Phaseback.
There is no other product on the market capable of stabilizing voltage on ungrounded power distribution systems like PHASEBACK can, and it will also do it even with intermittent faults on two phases
The last operation of Phaseback is the elimination of noise. Due to the fact the Phaseback circuit is a 60 hertz circuit and given that the selected Resistor provides resistance with very little inductance to cause a phase shift, mostly 60 hertz frequency flows to the primary side, the rest of the noise is dissipated through the resistor as heat energy as shown in the last graphs. The harmonic filtering is the square of the frequency. Phaseback filters third harmonic nine times better than 60 hertz noise, twenty five times better with fifth harmonic and forty nine times better with the seventh harmonic and so on.
Before 28% THD
After 2% THD Benefits of Phaseback
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Available In: Single Phase, 600Volt, 5 KV and 15 KV Class [Click here for our presentation of this product] Harmonic SilencerPATENT PENDING What the Harmonic Silencer Is and How It Works The Harmonic Silencer is a filter for WYE power systems. It is self protected and runs in parallel with other loads allowing installation without shutting down running equipment. The Silencers design includes a continuous duty positive temperature coefficient system that is self regulating. Any facility powered from a WYE power transformer will benefit from multiple units as necessary to lower harmonics to a level enabling trouble free operation. Typically only one Silencer will be needed to protect all loads on an entire power circuit from the effects of line harmonics. The Silencer is a harmonic reducing and surge suppression device based on a configuration of three power filters all designed to use little or no power when no noise energy is present. The Harmonic Silencer, like other Applied Energy LLC products, uses noise energy to cancel itself. The larger the noise the more the Silencer will react and apply a correction. The response time is not like other types of surge suppression. The Silencer reacts instantaneously limited only by the inductive charging rate. Solid state components are not used in the design. The Silencer differs from other types of suppression in other ways. There are no circuits converting high voltage spike to high current surges and the Silencer does not increase the magnitude of ground current in any machinery or facility circuit. [Click here for our presentation of this product] Phaseback Drive Voltage StabilizerThere are many brands, sizes and versions of Variable Frequency Drives (VFD's). Each type has drawbacks. They cause harmonics back onto the line and cause facility wide control problems when the facility is powered from a WYE connected power transformer. VFD's generate harmonics which develop additional heat in the motor windings. An increase of only 20 Degrees Celsius may shorten the motor life between 50 and 75%. VFD generated harmonics also cause shaft currents which damage the motor bearings. VFD's also degrade the windings of motors due to voltage spikes created by the switch mode power supplies and square wave power being supplied to the motor. Though inverter duty motors are designed to handle the heat caused by harmonics created in VFD's they do nothing to eliminate the harmonics or stabilize voltage or power factor. This harmonic reduction, improved power factor and voltage stabilization can be accomplished by placing a Phaseback Drive Voltage Stabilizer in between the drive and motor. Adding a Silencer on the line side of the drive the harmonics can be reduced by 50% or more. The installation of a Phaseback Drive Voltage Stabilizer connected in parallel with the motor can remove over 50% of the harmonics and voltage spikes from the phase voltages and also stabilizes them with respect to ground (Percentage may vary due to drive operation). Finally there is a way to enjoy the benefits produced by VFD's, tighter control of your process and longer drive and motor life while eliminating the drawbacks caused by the switching frequency, harmonics or spikes. The Applied Energy LLC website link is: www.phaseback.com Variable Frequency Drive Voltage Stabilization and Harmonic Filtering With the addition of a Phaseback DVS many of the old concerns become a thing of the past like adding line reactors at the input power connection for each drive and chokes at the output connection of each drive. The cable length issue between each drive and its associated motor will no longer be a great concern because Phaseback removes the noise that caused the problem. Drive manufacturers should not dictate where you mount your drive and some applications would be better having the drives indoors, not outside to be within a specified distance from the motor. The enclosed graphs clearly show the voltage stabilization and harmonic filtering of Phaseback connected between the drive and motor. Phaseback connects in parallel with the motor so it can not cause a surge in current. It contains no solid state components to degrade over time and can not be the source of noise because it beats the noise back against itself to cancel it. Several Sizes Available Unit Size based on Motor Size Voltage tappable thru 600 Volts [Click here for our presentation of this product]
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