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The core purpose of insulating Chuma cha silikoni sheets is to reduce eddy current loss. When alternating magnetic fields pass through stacked laminations, uninsulated Chuma cha silikoni sheets form closed-loop circulating currents, and such energy is ultimately dissipated in the form of heat.

I. Insulation and Eddy Current Loss

When Chuma cha silikoni sheets are stacked to form iron cores, direct contact between sheets induces circulating currents within the plane of laminations under alternating magnetic fields — these are eddy currents. Eddy currents not only waste energy but also trigger localized temperature rises.

Insulating coatings create a resistive barrier between sheets, which is equivalent to breaking conductive paths. Actual measurements show that under identical operating conditions, insulated silicon steel sheets cut core loss by 15%–20%. This loss reduction margin expands as frequency increases, hence high-frequency transformers impose stricter insulation standards.

II. Implementation Forms of Insulating Materials

Common insulation solutions apply to distinct working scenarios:

• Insulating coating: Micron-scale inorganic film formed via phosphating or spraying, balancing heat resistance and adhesion.
• Insulating varnish: Continuous film cured from organic resin solutions, suitable for intricately shaped stamped laminations.
• Insulating paper: Cellulose-based material with high mechanical strength, widely adopted in oil-immersed transformers.

All above materials share a volume resistivity above \(10^6\ \Omega\cdot\text{cm}\), which effectively blocks inter-sheet currents. However, excessively thick insulation layers will lower the stacking factor; the coating thickness is generally controlled within 3–15 μm.