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NewsFebruary 24, 2004: TEAL Awarded Patent On Filter That Improves System Performance And Reliability TEAL Electronics Corporation (San Diego, CA) was recently awarded a patent for an advanced electrical noise filtering circuit that helps improve an OEM customer’s system performance and reliability by significantly reducing damaging and disruptive power disturbances on the AC line. U.S. Patent No. 6,624,997 was awarded to Rey Llanos, Randy Redding, and Victor Soto for "Electrical Power Conditioner", which is a high performance scalable shunt filtering circuit with a very low series impedance designed to provide high purity electrical power to the load. "TEAL continues to advance the technology in the power quality arena, and the technology in this patent can be found in the TEALwave® family of electrical filters available in our power subsystem and power conditioning products," said Jim Taylor, President of TEAL Electronics and SL Industries Power Electronics Group.
TEAL’s patented TEALwave® power line filter system solves the above mentioned problems by means of an improved power conditioner circuit that includes a special type of power line filter system having a low series impedance at both 60 Hz and at high frequencies when compared to conventional filters. "This low impedance filter, coupled with a low impedance isolation transformer, provides superior electrical power filtering for loads with high peak power requirements," Taylor said. "The power line filter system can also be cascaded to increase performance in a cost-effective manner while maintaining a very low series impedance." TEAL Electronics is the leading provider
of custom power subsystems for the technology sector, primarily serving the medical
imaging and semiconductor production/testing markets. Its mission is to help customers
make products that are more competitive and reliable by engineering and manufacturing
innovative custom power solutions. |
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Electrical filter devices are typically employed
on the AC power mains to help protect electronic equipment from spikes, surges,
and other electrical high speed noise transients that could disrupt or damage
downstream electronic equipment. There are several ways to filter electrical
power to provide downstream equipment with clean and pure electrical power,
including traditional LC filtering and Surge Suppression devices. A weakness
of many of these types of electrical filters are that they typically shunt
the electrical noise to the neutral conductor of the mains, often creating
excessive common-mode noise that can be as damaging and disruptive as the
original noise. Also, very careful installation (specifically wire length,
sizing, and routing) is required to minimize added inductance and maximize
filter performance of typical filters, which is often impractical.
Series-connected filter devices can often address these issues, but
series-connected filters can often introduce drawbacks of their own,
specifically added series impedance to the mains.