Title :
Low-cost high-bandwidth current transducer for automotive applications
Author :
McNeill, Neville ; Iordanidis, George ; Holliday, Derrick ; Mellor, Philip
Author_Institution :
Dept. of Electr. & Electron. Eng., Bristol Univ.
fDate :
5/1/2006 12:00:00 AM
Abstract :
Electric actuators in automotive systems may require a current transducer for control purposes. A low-cost non-invasive transducer design based around a current transformer (CT) is described in this letter. The problem of droop in the output signal is addressed by controlling the CT´s secondary terminal voltage in response to the 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 100-A current pulse of 10-ms duration is demonstrated
Keywords :
automotive engineering; current transformers; electric actuators; electric sensing devices; power convertors; transducers; transformer cores; transformer windings; 100 A; core flux change; current transformer secondary terminal voltage; electric actuators; high-temperature automotive environments; hysteresis control schemes; low-cost high-bandwidth current transducer; noninvasive transducer design; peak current mode; tertiary flux-change sense winding; Actuators; Automotive applications; Automotive engineering; Bandwidth; Circuits; Control systems; Current transformers; Transducers; Transformer cores; Voltage control; Automotive actuator; current transformer (CT);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2006.875564
