Composite gradient magnetic conduction material structure for electromagnetic coil

Abstract

The invention belongs to the technical field of electromagnetic heating coil equipment and relates to a composite gradient magnetic conduction material structure for an electromagnetic coil. The magnetic conduction material structure comprises an aluminum plate, a magnetic body, a mica bottom sheet and a coil winding; the magnetic body is arranged on the aluminum plate; the mica bottom sheet is arranged at the upper end of the magnetic body; the coil winding is fixedly wound on the mica bottom sheet; the magnetic body consists of L-shaped ferrites and an annular ferrite; the L-shaped ferritesare symmetrically distributed on the aluminum plate along the central point of the aluminum plate; and the annular ferrite is coaxially arranged above the symmetrical center of the L-shaped ferrites.According to the composite gradient magnetic conduction material structure for the electromagnetic coil of the invention, the L-shaped ferrites and the annular ferrite form the composite gradient magnetic conduction structure; the ferrite materials with gradient magnetic conductivity are adopted so as to be compounded into the composite gradient magnetic conduction structure. Thus, with a gradientmagnetic conduction method adopted, the problem that the magnetic conductivity of a traditional magnetic strip is insufficient or prone to saturation is solved; a magnetic field leakage level can bedecreased; magnetic field uniform distribution can be improved; the inductance value of the magnetic strips for the coil panel is enhanced; the use of non-ferrous metal can be reduced under the same requirement; and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of electromagnetic heating coil equipment, in particular to a composite gradient magnetic-permeable material structure used for electromagnetic coils. Background technique [0002] Induction cooker is a kind of high-efficiency and energy-saving kitchen utensils, which is the development trend of heating cookers in the future. It is mainly composed of coil disks, control circuits, magnetic strips and other structures. The induction cooker is an electric kitchen utensil made by the principle of electromagnetic induction heating. It mainly generates a high-frequency alternating magnetic field through a high-frequency alternating current through a coil plate, and then uses the eddy current generated by the high-frequency alternating magnetic field in the ferromagnetic cooker to heat the food. , high efficiency and easy to use. [0003] The magnetic strip is one of the core components of the electromagnetic coil...

AI Technical Summary

Problems solved by technology

However, it is proved by simulation and experiments that the existing magnetic strip design cannot well shield the electromagnetic radiation generated by the coil disk, especially at the position of the longitudinal edge of the coil disk, and the electromagnetic leakage is relatively serious

Although the U-shaped magnetic strip is better than the strip-shaped magnetic strip, the effect on the longitudinal edge is still not ideal, and it will cause uneven heating.

Moreover, the existing magnetic strips only have a single magnetic permeability. In places where the magnetic induction lines are relatively dense or when the current power is large, it is easy to cause the magnetic strip to be saturated, thereby reducing the magnetic permeability of the magnetic strip and reducing the working efficiency.

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