Title :
Investigation of direct flux measurements in switched reluctance motors
Author :
McCann, Roy ; Traore, Wendyam
Author_Institution :
Dept. of Electr. Eng., Univ. of Arkansas, Fayetteville, AR
Abstract :
This paper investigates the use embedded magnetic field sensors in estimating the torque produced by a switched reluctance motor. Recent advances in nanomaterials have enabled the development of very compact magnetic field sensors based on the giant magneto resistive (GMR) effect. This provides a direct measurement of internal magnetic flux levels of an electric machine during operation. With this capability, results are applied analytically to a switched reluctance motor to measure the flux distribution across the surface of a stator tooth. This data is then used in a discrete form of the Maxwell stress tensor to approximate the net torque at the motor shaft. Detailed results are given from a finite element study of a commercially produced switched reluctance motor.
Keywords :
magnetic field measurement; magnetic flux; magnetic sensors; magnetoresistive devices; reluctance motors; GMR; Maxwell stress tensor; direct flux measurements; embedded magnetic field sensors; finite element study; magnetic flux level measurement; magneto resistive effect; nanomaterials; switched reluctance motors; Electric machines; Electric variables measurement; Magnetic analysis; Magnetic field measurement; Magnetic flux; Magnetic sensors; Magnetic switching; Nanomaterials; Reluctance motors; Torque; Switched reluctance motor; magnetoresistive sensors;
Conference_Titel :
Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century, 2008 IEEE
Conference_Location :
Pittsburgh, PA
Print_ISBN :
978-1-4244-1905-0
Electronic_ISBN :
1932-5517
DOI :
10.1109/PES.2008.4596841