Non Invasive Sensors for Monitoring the Efficiency of AC Electrical Rotating Machines

Sensors

Farid Zidat²  Jean-Philippe Lecointe²  Fabrice Morganti²  Jean-François Brudny²  Thierry Jacq¹ 

[1] EDF-R&D-Département THEMIS Groupe R25, F-92141 Clamart Cedex, France; E-Mail:;Univ Lille Nord de France, F-59000 Lille, France; E-Mails:

关键词: magnetic field sensors;    efficiency diagnosis;    AC electrical motors;   

DOI  :  10.3390/s100807874

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.