title: Non invasive sensors for monitoring the efficiency of AC electrical rotating machines.
abstract: This paper presents a non invasive method for estimating the energy efficiency of induction motors used in industrial applications. This method is innovative because it is only based on the measurement of the external field emitted by the motor. The paper describes the sensors used, how they should be placed around the machine in order to decouple the external field components generated by both the air gap flux and the winding end-windings. The study emphasizes the influence of the eddy currents flowing in the yoke frame on the sensor position. A method to estimate the torque from the external field use is proposed. The measurements are transmitted by a wireless module (Zig-Bee) and they are centralized and stored on a PC computer.
authors.affiliation: Univ Lille Nord de France, F-59000 Lille, France. zidat.farid@yahoo.fr
authors.forename: Farid
authors.initials: F
authors.lastname: Zidat
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Lecointe
authors.forename: Fabrice
authors.initials: F
authors.lastname: Morganti
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Brudny
authors.forename: Thierry
authors.initials: T
authors.lastname: Jacq
authors.forename: Frédéric
authors.initials: F
authors.lastname: Streiff
mesh_terms: D000465:Algorithms; D055615:Electrical Equipment and Supplies; D004560:Electricity; D004574:Electromagnetic Fields; D007221:Industry; D008962:Models, Theoretical; D015203:Reproducibility of Results; D019415:Torque