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US 6,486,570 B1Granted
Waveform correction filters
AssigneeEnvironmental Potentials, Inc.
InventorsEdward G. Price, Theodore Thibault, Andrew Pickett
Life of this patent
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AssigneeEnvironmental Potentials, Inc.
InventorsEdward G. Price, Theodore Thibault, Andrew Pickett
Estimating the term…
A waveform correction filter is connected into an alternating current power line to absorb and remove various forms of power pollution, including high-frequency spikes, surges and other forms of high-frequency oscillations, such as those which result from switching inductive loads on and off. The waveform correction filter of the invention includes a fuse and a coaxial amorphous toroidal inductor connected between a power line and neutral with a low-pass filter connected in series with the fuse and coaxial amorphous toroidal inductor. The filter includes a capacitor, a varistor connected in parallel with said capacitor, and a magnetic core inductor connected in series with each other and in parallel with the capacitor and said varistor. A lamp may be connected in series with the resistor and the magnetic core inductor or across the resistor. Various arrangements are shown for connecting a plurality of the waveform correction filters into single phase or three-phase Wine or delta circuits.
A waveform correction filter to be connected to an alternating current power source comprising:
A waveform correction filter to be connected to an alternating current power source comprising:
A waveform correction filter network system connected to an alternating current power source including two power lines and a neutral line comprising:
A waveform correction filter network system to be connected to an alternating current power source comprising a first filter network connected between one side of said source and a neutral line, and a second filter network connected to the opposite side of said source and said neutral line, each of said first and second filter networks comprising a fuse and a coaxial amorphous toroidal inductor of soft magnetic material in series, and a filter connected in series with said fuse and said coaxial amorphous toroidal inductor comprising a capacitor, a varistor in parallel with said capacitor, and a magnetic core inductor and a resistor in series with each other and in parallel with said capacitor and said varistor.
A waveform correction filter network system connected between a three-phase, Y-connected alternating current source having three phase lines and a neutral line comprising first, second and third filter networks, each of which is connected between one of said phase lines and said neutral line, each of said filter networks including a coaxial amorphous toroidal inductor of soft magnetic material connected to one of said phase lines, and a filter connected in series with said coaxial amorphous toroidal inductor comprising a capacitor, a varistor in parallel with said capacitor, and a magnetic core inductor and a resistor in series with each other and in parallel with said capacitor and said resistor.
A waveform correction filter system connected to a three phase delta connected alternating current source having three-phase lines, said system comprising first, second and third filter networks, the first filter network being connected between a first phase line and a second phase line, the second filter being connected between said second phase line and said third phase line, and the third filter network being connected between said third phase line and said first phase line, each of said suppression networks including a coaxial amorphous toroidal inductor of soft magnetic material connected to one of said phase lines, and a filter connected in series with said coaxial amorphous toroidal inductor comprising a capacitor, a varistor in parallel with said capacitor, and a magnetic core inductive member and a resistor in series with each other and in parallel with said capacitor and said resistor.
Dependencies are inferred from the claim text.