Current detector

摘要

A current detector includes a magnetic core that is molded by sintering powder made from a magnetic material, and a current detection busbar. The current detection busbar is a conductor including a penetrating portion that penetrates a hole portion of the magnetic core in a first direction in which a current flows, and terminal portions that are in connection with the penetrating portion on both sides in the first direction. The width of the terminal portions is larger than the maximum width of the hole portion, and the minimum width of the cross-sectional contour of the penetrating portion is larger than the thickness of the terminal portions. An insulating casing holds the magnetic core, the current detection busbar, and the Hall element, while keeping them from coming into contact with each other.

主权项

1. A current detector for detecting a current that flows through a busbar, comprising:
a magnetic core configured to be molded by sintering powder made from a magnetic material,
the magnetic core having at least two ends facing each other across a gap portion, andthe magnetic core being formed in one piece so as to surround a hole portion; a magneto-electric conversion element being disposed in the gap portion of the magnetic core and detecting a magnetic flux that changes in accordance with a current that passes through the hole portion of the magnetic core; and a current detection busbar made of a conductor;
the current detection busbar including a penetrating portion that penetrates the hole portion of the magnetic core and terminal portions that are in connection with the penetrating portion on both sides in a direction in which the penetrating portion penetrates the hole portion;the terminal portions being configured to be joined with an upstream connection end and a downstream connection end respectively of a current transmission path,a width of the terminal portion being larger than a width of the hole portion, wherein at least one of the terminal portions of the current detection busbar is in a shape of a flat plate, and a minimum width of a cross-sectional contour of the penetrating portion is configured to be larger than a thickness of the terminal portion in the shape of the flat plate.