NDLI: Analysis of a tunnelling magneto-resistance-based angle transducer

Content Provider	IET Digital Library
Author	Sreekantan, Anoop Chandrika George, Boby Kumar, Varadarajan Jagadeesh
Abstract	An angle transducer that utilises tunnelling magneto-resistance (TMR) type sensor elements is presented and its performance is analysed. The signal conditioning circuit of the proposed angle transducer translates the sine-cosine outputs of a TMR sensor integrated circuit into an output that varies linearly with the sensing angle. An added advantage of the proposed scheme is that the output of the angle sensor is dictated, apart from the angle being sensed, only by a dc reference voltage. Thus good performance characteristics can be obtained from the proposed transducer very easily by using a precision dc voltage as the reference. Possible sources of errors that may affect the performance of the transducer are identified and their effects are quantified. Simulation studies conducted using SPICE demonstrates the ability of the scheme in providing a linear output across the entire 360° range. Experimental results obtained from a prototype unit built and tested, portray a worst-case error of < ±1.05%.
Starting Page	301
Ending Page	310
Page Count	10
ISSN	1751858X
Volume Number	8
e-ISSN	17518598
Issue Number	Issue 4, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cds/8/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cds.2013.0399
Journal	IET Circuits, Devices & Systems
Publisher Date	2014-03-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Angular Measurement Dc Reference Voltage Magnetic Sonsor Magneto-acoustic Wave Device Magnetoresistive Device Magnetoresistive Wave Device Magnetostrictive And Magnetostatic Wave Device Precision Dc Voltage Sensing Device And Transducers Signal Conditioning Circuit Sine-cosine Output Spatial Variables Measurement Spice TMR Sensor Integrated Circuit TMR Type Sensor Element Transducers Tunnelling Magnetoresistance Tunnelling Magnetoresistance-based Angle Transducer Analysis
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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