Electricity: motive power systems – Positional servo systems – With compensating features
Reexamination Certificate
2007-10-31
2010-06-29
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Positional servo systems
With compensating features
C318S611000, C318S629000, C333S178000
Reexamination Certificate
active
07746020
ABSTRACT:
Systems and methods for improved Variable Speed Drives having active inverters include an input filter for filtering common mode and differential mode currents. A three-phase inductor has three windings, each winding of the three-phase inductor having a center tap dividing each winding into a pair of inductor sections; and a three-phase input capacitor bank connected in a wye configuration to the three center taps at one end, and to a common point at the opposite end. The three-phase input capacitor bank provides a short circuit for frequencies above a predetermined fundamental frequency for shunting such frequencies through the three phase capacitor bank, while passing the predetermined fundamental frequency to an input AC power source.
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Adiga Manoor Shreesha
Jadric Ivan
Schnetzka Harold R.
Duda Rina I
Johnson Controls Technology Company
McNees Wallace & Nurick LLC
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