4 principles followed in the design of the inductor of induction heating furnace

1. Select the lower limit of the current frequency

When the blank is heated by induction, two current frequencies can be used for the same blank diameter. A lower current frequency should be used, because the current frequency is high and the power supply cost is high.

2. Choose rated voltage

Select the rated voltage for the terminal voltage of the inductor in order to make full use of the capacity of the power supply, especially when the power frequency induction heating, if the terminal voltage of the inductor is lower than the rated voltage of the power supply, the number of capacitors used to improve the power factor cos<p will increase greatly. Large, it also increases the equipment cost of the power supply.

3. Control the power per unit area

When the blank is inductively heated, due to the requirements of the temperature difference between the surface and the center of the blank and the heating time, the unit area power of the blank is 0.2-0. 05kW/cm2o when designing the inductor.

4. Selection of rough resistivity

When the blank adopts sequential and continuous induction heating, the heating temperature of the blank in the inductor changes continuously from low to high along the axial direction. The resistance of the blank should be selected as 100 ~ 200℃ lower than the heating temperature in the calculation of the inductor. Rate, the calculation result will be more accurate.