Current sensor

Details Current sensor Current sensor

2007-07-31

2007-07-31

Nguyen, Ha Tran (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

Reexamination Certificate

active

11583010

ABSTRACT:
A current sensor includes a first magnetic core that surrounds a portion of a conductor as a current path and has gaps therein, each of which is defined by adjacent ends spaced from each other by a first distance, a magnetic sensing element placed in at least one of the gaps, and a second magnetic core placed near the surrounded portion of the conductor to divide the conductor into channels. The second magnetic core is spaced from the first magnetic core by a second distance smaller than the first distance. Therefore, a magnetic resistance of the second magnetic core is smaller than that of the first magnetic core in a magnetic circuit formed by the first and second magnetic cores. As a result, a disturbance magnetic field mainly passes through the second magnetic core.

REFERENCES:
patent: 4059798 (1977-11-01), Dierker et al.
patent: 4639665 (1987-01-01), Gary
patent: A-08-15321 (1996-01-01), None
patent: A-08-15322 (1996-01-01), None
patent: A-10-73619 (1998-03-01), None
patent: A-11-258275 (1999-09-01), None

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