Current probe

Details Current probe Current probe

2005-04-26

2005-04-26

Zarneke, David (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

Reexamination Certificate

active

06885183

ABSTRACT:
A current probe suitable for detecting a large current from DC to high frequency has first and second current detecting means. The first current detecting means detects a current under test from DC to a predetermined intermediate frequency band. It has an orthogonal flux gate element, an induced voltage detecting circuit46for detecting an induced voltage of the orthogonal fluxgate element, and a feedback coil50receiving the output voltage of the induced voltage detecting circuit46for generating magnetic flux to cancel the magnetic flux generated by the current under test. The second current detecting means has a Rogowski coil12and an integration circuit and detects said current under test higher than the predetermined intermediate frequency band.

REFERENCES:
patent: 4912396 (1990-03-01), Groenenboom
patent: 5015945 (1991-05-01), Radun
patent: 6366076 (2002-04-01), Karrer et al.
patent: 6563296 (2003-05-01), Cooke
patent: 6680608 (2004-01-01), Kojovic
patent: 09-023085 (1997-01-01), None

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