Generates magnetic flux perpendicular to the silicon surface and cause increased noise

Each level of the iron yoke and the sheet width ratio of the stem, they should be equal to the ratio of the cross-sectional area. This prevents the magnetic flux from the stem into the yoke, because the generated magnetic flux perpendicular to the silicon surface and cause  electric meter  noise. Core using 45 ° miter joints, can reduce the corner  Circuit breaker  core, so that the core noise reduction 4dB. To ensure the mechanical  Electric energy meter  of the core of the premise, the seam area should be smaller overlap area, so that the corner of the magnetic flux through the non-silicon area is reduced in the rolling direction, in order to reduce noise.