Air-core reactor

The utility model provides an air-core reactor which comprises an air-core coil assembly which comprises a first air-core coil, a second air-core coil and a third air-core coil. The central axis direction of the first air-core coil, the central axis direction of the second air-core coil and the central axis direction of the third air-core coil are parallel to one another, and the first air-core coil, the second air-core coil and the third air-core coil are distributed in a triangular shape on the section perpendicular to the central axis direction of the first air-core coil; the iron yoke assembly comprises a first iron yoke and a second iron yoke; the first iron yoke and the second iron yoke are located at the two ends of the hollow coil assembly in the center axis direction of the first hollow coil. The clamping mechanism penetrates through the first iron yoke and the second iron yoke and fixes the hollow coil assembly and the iron yoke assembly; and the clamping mechanism is a detachable clamping mechanism