Magnetic suspension type packaging method for dry-type transformer core

Abstract

The invention discloses a magnetic suspension type packaging method for a dry-type transformer core, and belongs to the field of electronic device packaging. During glue sealing, a magnetic floating ball is put first, then molten epoxy resin is injected, the magnetic floating ball is gradually disintegrated, constraint on an internal magnetic wrapping wrinkled ball is relieved, the volume of the magnetic wrapping wrinkled ball is increased after the magnetic wrapping wrinkled ball is heated to expand, then the whole magnetic floating ball is in a state that the mass is reduced and the volume is increased in the molten epoxy resin, so that the density of the magnetic floating ball is obviously reduced, the buoyancy of the magnetic floating ball in the molten epoxy resin is increased, the magnetic floating ball gradually floats upwards, bubbles in the epoxy resin are continuously broken during floating, the bubbles overflow upwards, and when the magnetic wrapping wrinkled ball expands, the magnetic powder in the magnetic wrapping wrinkled ball is gathered, so that the local magnetic field is stronger, and the sinking and floating of the ball are better controlled when the magnetic field is externally applied, so that the bubble removal effect is remarkably improved, the cracking of a glue sealing layer in the transformer is effectively avoided, and the potential safety hazard is reduced.

Description

technical field [0001] The invention relates to the field of packaging of electronic devices, in particular to a magnetic floating packaging method for a dry-type transformer core. Background technique [0002] Electronic devices refer to devices made by utilizing and controlling the laws of electron motion in vacuum, gas or solid. Divided into electric vacuum devices, gas-filled tube devices and solid-state electronic devices. In analog circuits, it is used for rectification, amplification, modulation, oscillation, frequency conversion, phase locking, control, correlation, etc.; in digital circuits, it is used for sampling, limiting, logic, storage, counting, delay, etc. The gas-filled tube device is mainly used for rectification, voltage stabilization and display. Solid-state electronic devices mainly include: resistors, capacitors, crystal diodes, Zener diodes, inductors, varactor diodes, transistors, field effect transistors, sensors, and transformers. [0003] Tradit...

AI Technical Summary

Problems solved by technology

[0003] Traditional dry-type transformers usually use epoxy resin, electronic potting glue or asphalt to directly pot the transformer core and electronic circuit board in the plastic shell to achieve the purposes of molding, insulation, heat dissipation and waterproof. When epoxy resin is sealed, air bubbles are likely to exist inside, resulting in the formation of inch-sized gaps inside the epoxy resin layer. During long-term use, it is easy to crack, affecting its insulation and waterproof functions, and posing a safety hazard

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