To provide a power measuring device capable of measuring electrical power stably with high accuracy.
In a power measuring device, first through fourth magnetic material components 3a through 3d are composed of a connection body of square tiny elements 3s in a meandrous shape pattern. Accordingly, while having a long pattern as a whole, the first through fourth magnetic material components 3a through 3d are a connection body of squares, so that, without shape anisotropy, a magnetization direction thereof is a direction passing through a center of the square, and parallel to two sides of the square. Accordingly, a magnetization direction P is configured to form an angle of 45° against a current path Q, allowing a current path to be taken in a direction parallel to a primary conductor 200 so that high sensitivity can be achieved.
MIYAMURA YUSUKE
NAKAMURA ATSUSHI
YOSHIDA HIROSHI
Toshimitsu Ichikawa
Kimihide Hashimoto