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The two key conditions for demagnetization are: alternating magnetic poles and decreasing magnetic field strength. To demagnetize a ferromagnetic material, the uniformity of its magnetic domain alignment must be disrupted, making the arrangement of the magnetic domains completely random so that no magnetism is exhibited externally. Read More

The core should be flat with intact insulation varnish film and tightly stacked laminations. The silicon steel sheets on the edges should not be curled up or wavy. The surface of all core parts should be free of oil sludge and impurities. There should be no short circuits or (lapping) between laminations, and the joint gaps must meet the required specifications. Read More