The Design Of The Inductor Used In High-frequency Induction Heating Equipment

With the popularity of induction heating technology, more and more kinds of shape of the induction heating of the workpiece have been invented. As the workpiece is generally used in the interior of the inductor for heating, it has to be adapted to the different sectional rough design for heating inductor. Typically, the shape for the induction heating of the inductor can be made into spiral-shaped inductor, Slit-like inductor, Slit-like inductor, Shaped inductor, inductor with a magnetic conductor, etc. While, it is difficult for us to find a selected theoretical calculation method to design the inductor of induction heating, and the traditional methods usually relies on "experience" or use of existing formulas, because the traditional method of making larger error, its will cause the workpiece is heated not achieve the desired heating effect, then it is a waste of human and financial resources. To avoid the drawbacks of it, this paper line with low cost, high efficiency, safety and reliability of the guiding ideology, the combination of theoretical and experimental research methods,using the experimentally measured inductance value to correct theoretical value, in order to improve the heating efficiency of the inductor. The main contents of this paper include:First, through the establishment of the mathematical model of the induction heating inductors (spiral) and the workpiece, deriving a general inductor inductance formula, and combine the results of experimental measurements to analyze a variety of factors affect the inductance values of the sensor. Then, using the Spiral-shaped coil element experimental verification of the general relationship of the monolayer helical coil element" section inductor value "and the" overall inductance value, as well as the impact of workpieces of different materials (magnetic and non-magnetic material) on the relationship between "part" and "whole". Finally, based on the principles of the induced electromotive force, increase the number of induction coil element in order to get n finite-length multi-layer solenoid coil inductance element in series, linking and reverse the formula. Putting some different sizes spiral coil element of the same name connection, as the current flows in a direction consistent, so the magnetic field generated has the same direction and the new inductance greater than the single-layer coil inductance. Thus, we can utilize the multi-layer spiral coil elements in series to combining in order to get the required inductance value.