Systeme, Verfahren und Vorrichtungen zur Demodulation der Momentanen Harmonischen Frequenz der Läufernut eines Induktionsmotors

Details

Veröffentlichungs-Nr.

EP2448109

Aktenzeichen

EP10290582

Anmeldetag

28. Oktober 2010

Veröffentlichung

11. September 2019

Erteilung

11. September 2019

Rechtsraum

EP

IPC

G01R31/34H02P21/18H02P23/14

Abstract

A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.

Anmelder

Firma

Schneider Electric USA, Inc.

Land

🇺🇸 USA

Fachgebiete