Low-Profile Ring-Shaped Core Electric Current Detector

The patent transitions from a vertical-type annular core configuration to a horizontal-type ring-shaped core configuration. This dimensional change allows the magnetic flux detection function to be maintained while the profile height is significantly reduced, as the core now extends horizontally rather than vertically, enabling surface mounting on circuit boards without requiring significant vertical clearance.

The patent integrates the fluxgate-type magnetic sensor IC chip directly into the ring-shaped core structure, with the sensor positioned within the gap between UU-core members. This nesting approach consolidates multiple components (core, sensor, circuit board) into a compact integrated assembly, reducing overall profile height while maintaining detection functionality.

The patent creates a localized high-permeability magnetic path using the ring-shaped core structure with UU-core members. The gap between these members is specifically designed to concentrate and guide magnetic flux, ensuring that despite the horizontal orientation, the local magnetic field conditions at the sensor position remain optimal for detection, thus maintaining measurement precision.

The ring-shaped core acts as an intermediary that channels and concentrates magnetic flux from the primary conductor through the gap region where the fluxgate sensor is positioned. This intermediary structure ensures efficient magnetic coupling between the conductor and sensor, maintaining detection effectiveness despite the changed orientation from vertical to horizontal.