Reasons for high coil temperature of electromagnetic heater

Electromagnetic induction heaters use electronic technology to apply electrical energy directly to the metal barrel via a high-frequency induction heating coil, achieving a self-heating efficiency of up to 90%. Depending on actual usage, the barrel is wrapped with a certain thickness of thermal insulation material to keep the outer surface temperature down to a touchable level, effectively preventing heat loss. While the induction heater itself dissipates a certain amount of heat, it's usually not very high, typically around 50°C to 60°C, which is comfortable to touch. However, if the coil temperature of the electromagnetic induction heater becomes excessively high during use, the following factors should be considered:

1. The high-temperature cable used in the electromagnetic heater is too small.

Electromagnetic heating controllers of different power require high-temperature cables of varying diameters due to the varying loads they must transport. If the channel is too narrow, exceeding the load capacity per unit area, the heat dissipated will naturally be higher than normal.

2. The electromagnetic heating controller's insulation is thin.

To maximize the thermal insulation and heat-insulating properties of the insulation, the thickness of the insulation is typically around 15-25mm. If the thickness is too thin, more heat will be lost from the barrel, resulting in higher temperatures in the high-temperature cable. Conversely, if the insulation is too thick, it will affect the electromagnetic induction effect of the high-temperature cable, resulting in a low heat conversion rate and reduced equipment efficiency.

3. The electromagnetic heater has too few coils.

The number of coils on the surface of an electromagnetic heater is proportional to its inductance. A smaller coil size results in lower inductance, requiring the electromagnetic heating controller to output more current to achieve the desired heating effect. This, in turn, places greater load on the high-temperature cable and generates more heat.

The three main reasons for excessive coil temperatures during use in an electromagnetic induction heater are the above three points, which are important considerations when installing the electromagnetic heater. To ensure the most efficient use of the equipment, meticulous attention to detail is essential.