Introduction of induction heating method of electric heater

Since it was discovered that power can produce thermal effects through wires, many inventors in the world have been engaged in the research and manufacture of various electric heaters. The development and popularization of electric heaters are the same as other industries. The outlet of the electric heater is equipped with a temperature sensor, and the thermocouple is a temperature measuring element, and the temperature can reach 800 degrees. The process adjusts the heating power mainly by controlling the conduction angle of the bidirectional thyristor in the voltage regulator module to achieve the output voltage of the voltage regulator module, thereby changing the power of the heater. When the process needs to start the heater, first turn on the power switch and ensure that the emergency stop point is in a closed state. Under the premise of no fault alarm, press the start button and the contactor is closed, and the upper end of the voltage regulator module is energized.
The industrial frequency power supply is the AC power supply usually used in industry. Most of the industrial frequencies in the world are 50 Hz. The voltage of the industrial frequency power supply used in induction heating added to the induction device must be adjustable. According to the power size of the heating equipment and the capacity of the power supply network, a high-voltage power supply (6-10 kV) can be used to supply power through a transformer; or the heating equipment can be directly connected to a 380-volt low-voltage power grid.
The medium-frequency power supply of the electric heater uses a thyristor inverter. This medium frequency power supply uses thyristors to convert industrial frequency AC into DC, and then converts DC into AC of the required frequency. This frequency conversion equipment is small in size, light in weight, noiseless, and reliable in operation. The object to be inductively heated must be a conductor. When high-frequency AC current passes through a conductor, the conductor produces a skin effect, that is, the current density on the surface of the conductor is large and the current density in the center of the conductor is small.