The electromagnetic induction heater utilizes electronic technology to directly convert electrical energy into heat by a high-frequency induction coil acting on the metal cylinder, achieving an efficiency of up to 90%. Additionally, based on actual usage, a certain thickness of thermal insulation material is wrapped around the cylinder's exterior to lower the surface temperature to a touchable level, effectively preventing heat loss. There will also be some heat dissipation, usually not very high, with normal temperatures around 50℃ to 60℃; it is safe to touch with bare hands. If the coil temperature of the electromagnetic induction heater becomes too high during operation, the following reasons should be considered:

1. The high-temperature cable of the electromagnetic heater has a small diameter.

The wire diameter of high-temperature cables equipped with electromagnetic heating controllers of different power ratings varies due to the differing amounts they need to transmit. If the channel is too narrow and the amount carried per unit space exceeds its capacity, the heat emitted will naturally be higher than normal.

2. Insulation material for electromagnetic heating controllers is thin.

To fully utilize the insulating effect of thermal insulation cotton, its thickness is typically around 15-25mm. If it's too thin, more heat from the extruder will be lost, resulting in higher temperatures for the high-temperature cables. Conversely, if the insulation cotton is too thick, it can impair the electromagnetic induction effect of the high-temperature cables, leading to a lower electrical to thermal conversion rate and affecting the equipment's efficiency.

3. The coil winding count of the electromagnetic heater is reduced.

The number of turns in the surface coil of an electromagnetic heater is directly proportional to the inductance size. If the coil is smaller, the inductance is also smaller. Therefore, the electromagnetic heating controller needs to output more current to achieve the heating effect, resulting in a higher load carried by the high-temperature cable and more heat dissipated.

The primary reasons for excessive coil temperature during the operation of electromagnetic induction heaters are the three points mentioned above. These are also the aspects to be mindful of during the installation of the electromagnetic heater, ensuring the equipment's use. Attention to detail is crucial in order to maintain proper operation.

When using an electromagnetic heater, attention to detail is crucial to ensure the proper operation of the equipment.