A Low-Cost Current Transducer for Automotive Actuators

JN McNeill, SG Burrow, G Iordanidis, DMJ Holliday, PH Mellor

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)


Electric actuators in automotive systems may require a current transducer for control purposes. A low-cost noninvasive transducer design based around a current transformer is described in this paper. The problem of droop in the output signal is addressed by controlling the current transformer's secondary terminal voltage in response to the rate of core flux change. This is detected using a tertiary flux-change sense winding. The circuit is suited for use in high-temperature automotive environments. The bandwidth of the circuit is high, allowing it to be used in peak current mode or hysteresis control schemes. Operation when sensing a 100A current pulse of 10 ms duration is demonstrated and shows good agreement with the simulated performance.
Translated title of the contributionA Low-Cost Current Transducer for Automotive Actuators
Original languageEnglish
Title of host publicationSAE 2006 World Congress & Exhibition, Detroit, USA, April 2006
PublisherSAE International
Pages990 - 997
Number of pages8
ISBN (Print)9780768018394
Publication statusPublished - 1 Apr 2006

Bibliographical note

Conference Proceedings/Title of Journal: SAE 2006 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Conference Organiser: SAE
Other identifier: 2006-01-1594

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