NDLI: Analytical Magnetic Field and Driving Force Models Based on Measured Boundary Conditions for Industrial Coriolis Mass Flowmeters

Content Provider	IEEE Xplore Digital Library
Author	Li-Jun Wang Liang Hu Kok-Meng Lee Xiao-Dong Ruan Xin Fu
Copyright Year	1982
Abstract	Coriolis mass flowmeters (CMFs) have been widely used in industry because of its high precision (up to 0.1% on flow rig). A precondition to ensure the excellent performance of a CMF is that its measuring tube must vibrate with proper amplitude under different operating conditions. It is thus necessary to modify the driving force of its electromagnetic actuator (EMA), which however cannot be measured directly by means of a traditional force sensor. This paper presents an analytical model for calculating the EMA force of a CMF providing a means to predict some parametric effects on its performance. Specifically, the analytical model of a curved-tube CMF has been derived in closed forms for reconstructing the magnetic field from measured boundary conditions, and for calculating the Lorentz force of a permanent-magnet (PM)-based EMA in this paper. This novel coupled measurement-calculation approach, which relaxes the assumption of known magnetic property of the PM, has been validated through a series of experiments and applied to actual CMF offering insightful findings for designing EMA in CMF applications. Two sets of results are presented. The first set investigates the effect of two different loads on the vibration amplitude. The second set reveals the influence of vibration amplitudes on the Lorentz force of the EMA.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	4753
Ending Page	4760
Page Count	8
File Size	859457
File Format	PDF
ISSN	02780046
Volume Number	59
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Actuators Lorentz covariance Vibrations Electromagnetic devices Magnetic fields Force measurement Electron tubes reconstruction Analytical model coriolis mass flowmeter driving force electromagnetic actuator (EMA) Lorentz force magnetic field
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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