Battery monitoring current sensors : the fluxgate concept

Azzoni, Davide (LEM SA, Plan-les-Ouates, Switzerland) ; Teppan, Wolfram (LEM SA, Plan-les-Ouates, Switzerland) ; Carpita, Mauro (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

One of the difficulties concerning battery monitoring applications is the current measurement. Typically the measurement range (DC) can vary from 10 mA up to 1000 A. Today's available current transducers are not well adapted to work with good accuracy in this very large domain. In this paper a new measurement principle based on a technology of type ldquofluxgaterdquo [1] is presented, which allows reaching a wide measurement range while guaranteeing an excellent accuracy. The key idea is to use the magnetic field created by the primary (battery) current acting on a saturable inductor. By measuring the intervals to reach inductor saturation and the load current and making use of a suitable microcontroller it is possible to accurately evaluate the value of the primary current for both high and low current levels.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
IESE - Institut d'Energie et Systèmes Electriques
Publisher:
Barcelona, Spain, 8-10 September 2009
Date:
2009-09
Barcelona, Spain
8-10 September 2009
Pagination:
10 p.
Published in:
Proceedings of 2009 13th European Conference on Power Electronics and Applications, 8-10 September 2009, Barcelona, Spain
ISBN:
978-1-4244-4432-8
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2020-03-03, last modified 2020-03-05

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