The working principle of bearing heater is to use the eddy current produced by metal in alternating magnetic field to heat itself, which is usually used in metal heat treatment, etc. The principle is that when a thick metal is in an alternating magnetic field, current will be generated due to electromagnetic induction. When the thicker metal generates current, the current will form a spiral flow path inside the metal, so that the heat generated by the current flow will be absorbed by the metal itself, which will cause the metal to heat up quickly.<br>
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