Filter network for motor control systems

Details Filter network for motor control systems Filter network for motor control systems

2006-10-03

2006-10-03

Duda, Rina (Department: 2837)

Electricity: motive power systems

Induction motor systems

C318S811000, C318S254100, C318S611000, C363S040000, C363S052000

Reexamination Certificate

active

07116076

ABSTRACT:
Filter network for the reduction of the voltage switching speed between an electrical motor drive and an electrical motor and/or between an electrical distribution network and a motor drive, comprising for each electrical phase a self-damped inductor having a complex impedance determined by a magnitude (Z) and a phase (φ), the phase (φ) of the complex impedance being comprised between 80 and 90 degrees in the frequency range of the motor's current, and being less than 60 degrees in the frequency range of the overvoltage oscillations. Using the inventive filter network, it is possible to manufacture low cost and small size du/dt-filters generating low voltage overshoot and low losses.

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A.F. Moreira, T.A. Lipo, G. Venkataramanan, S. Bernet, “Modeling and Evaluation of dv/dt Filters for AC Drives with High Switching Speed”, EPE 2001—Graz, pp. 1-14, XP-001052038.

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