APPARATUS FOR HIGH BANDWIDTH CURRENT SENSING

摘要

A device for measuring electrical current in a line may include, among other things, a Hall effect sensor wherein a first response is generated by electrical current in the line; a current transformer disposed with the line extending axially therethrough and connected in series to the Hall effect sensor wherein a second response is generated by the electrical current in the line. An equalizer may be connected to the Hall effect sensor and to the current transformer and may be configured to flatten the first and second responses relative to each other. The permeability magnetic path length and cross section of the current transformer is selected such that low frequency roll-off of the current transformer is at a lower frequency than high frequency roll-off of the Hall effect sensor.

主权项

1. A device for measuring electrical current in a line comprising:
a Hall effect sensor disposed with the line extending axially therethrough wherein a first response is generated by electrical current in the line, a current transformer disposed with the line extending axially therethrough and connected in series to the Hall effect sensor, and having a low permeability core, wherein a second response is generated by the electrical current in the line, and an equalizer connected to the Hall effect sensor and to the current transformer configured to flatten the first and second responses relative to each other, wherein a permeability magnetic path length and cross section is selected such that low frequency roll-off of the current transformer is at a lower frequency than high frequency roll-off of the Hall effect sensor.