Thin-Film Current Sensor Using a Flux-Saturable Ring Core

Thin-Film Current Sensor Using a Flux-Saturable Ring Core

We developed a thin-film current sensor using a flux-saturable ring core. The sensor consists of a transformer unit composed of a saturable core, primary and secondary coils, and a load coil surrounding the transformer unit. The sensor is suitable for use in a fail-safe system. The chip size is 4mm...

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Veröffentlicht in:Journal of the Magnetics Society of Japan 1998, Vol.22(4_2), pp.705-708
Hauptverfasser: Fujiyama, Y., Yamada, Y., Kikuchi, H., Yamaguchi, M., Arai, K. I.
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
current sensor
fail-safe
flux-saturable core
thin film
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Beschreibung
Zusammenfassung:We developed a thin-film current sensor using a flux-saturable ring core. The sensor consists of a transformer unit composed of a saturable core, primary and secondary coils, and a load coil surrounding the transformer unit. The sensor is suitable for use in a fail-safe system. The chip size is 4mm × 4mm. A transmission efficiency of 60% was obtained when the carrier signal was a 3 Vpp-1 MHz sine wave. The secondary voltage of the sensor dropped by 90% when a 100-mA load current was applied to a 20-turn load coil.
ISSN:0285-0192
1880-4004
DOI:10.3379/jmsjmag.22.705