The principle of electromagnetic heating control temperature field distribution and:
1. Principle: The conductor is in the alternating current and the alternating current causes the alternating magnetic field around the conductor to cause the skin effect, which makes the conductor quickly heat up in the short space of the alternating current. The higher the frequency of the alternating current, the more serious the skin effect.
2. The depth of current penetration should be affected by heating:
Although the metal cylinder is in contact with the coil and the coil itself is low in temperature, the cylindrical surface heats up and even melts. The metal cylinder and the coil current are opposite to the eddy current, and the eddy current Joule heating acts on the metal itself to heat up and cause the metal cylinder to heat up. The surface of the current distribution is strong and radially outward according to the exponential function. The phenomenon of uniform distribution of the current tends to be significant with the increase of the current frequency
3. The temperature cloth of the workpiece should be heated:
The electric energy should be heated, and the metal penetration layer should transform the heat energy, and then rely on the thermal conductivity of the metal itself to transfer the heat energy from the high temperature to the low temperature, that is, the temperature of the current penetration layer transfers the temperature of each point inside the conductor to change the radial temperature and surface power density of the workpiece. And the thermal conductivity of the heating material
2. Technical significance of electromagnetic response heating:
The use of electromagnetic response technology to heat the workpiece has the advantages of high heating efficiency, low energy consumption, pollution, etc., electromagnetic response technology is widely used in industrial heating and smelting products. It is important to measure the temperature of the heated workpiece to control the heating temperature.
