Let's learn about the principle and advantages of medium frequency induction heating power supply

The working principle of medium frequency induction heating power supply

The workpiece is placed in the inductor, which is generally a hollow copper tube that inputs medium-frequency or high-frequency alternating current (1000-300000Hz or higher). The alternating magnetic field is generated to produce an induced current of the same frequency in the workpiece. This induced current is unevenly distributed in the workpiece. It is strong on the surface, but weak inside, and close to 0 in the center. This skin effect is used , can quickly heat the surface of the workpiece, and the surface temperature rises to 800-1000 degrees in a few seconds while the core temperature rises very little.

Advantages of medium frequency induction heating power supply

1) There is no need for overall heating of the workpiece, and local heating can be performed selectively, so the power consumption is low and the deformation of the workpiece is small.

2) The surface hardened layer can be controlled by adjusting the operating frequency and power of the equipment as needed. As a result, the martensite structure of the hardened layer is finer, and the hardness, strength and toughness are relatively high.

3) After heat treatment by induction heating, the workpiece has a thicker toughness area under the surface hard layer and has better compressive internal stress, which makes the workpiece have higher fatigue resistance and breaking ability.

4) The heating speed is fast, which can make the workpiece reach the required temperature in a short time and the heating speed is uniform. As a result, the surface oxidation and decarburization of the workpiece are lighter, and most workpieces do not require gas protection.

5) One machine can be used for multiple purposes. It can complete heat treatment processes such as quenching, annealing, tempering, normalizing, and quenching and tempering, as well as welding, smelting, thermal assembly, thermal disassembly, and thermal forming.

6) Heating equipment is easy to install on the production line, easy to implement mechanization and automation, and easy to manage. It can effectively reduce transportation, save manpower, and improve production efficiency.

7) It can be operated manually, semi-automatically and fully automatically; it can work continuously for a long time, or it can be used at random. It is conducive to the use of equipment during the period of low power supply and electricity price discount.

8) Easy to use, simple to operate, and can be started or stopped at any time. And no preheating is required.

9) It has high power utilization rate, is environmentally friendly and energy-saving, safe and reliable, and has good working conditions for workers, and is advocated by the state.