Parametric Rotary Speed Sensor of Robust Motor Control

Emenike C. EJIOGU  Kazuhiko ONO  Yorimoto TANNO  

IEICE TRANSACTIONS on Electronics   Vol.E77-C    No.6    pp.1012-1017
Publication Date: 1994/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Instrumentation and Control
parametric oscillation,  parametric sensor,  sliding mode control,  induction motor,  

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If one of the R, L, or C Parameter of an RLC parallel circuit is changed periodically, under certain conditions, an oscillation called Parametric oscillation occurs. If one of remaining circuit elements is made to change due to an external cause (e.g. an external electric or magnetic field), then the parametric oscillation will experience some modulation. This modulation process and the subsequent demodulation can be exploited to create several types of sensors. In this letter, we describe the features of a new parametric magnetic speed sensor and its application in Induction motor robust control.