Processing method of electromagnetic shielding magnetic material

Abstract

The invention discloses a processing method of an electromagnetic shielding magnetic material. A soft magnetic alloy magnetic material strip is wound into a soft magnetic alloy magnetic material ring,and the ring is installed a thermal processing furnace; protection gas is injected into the thermal processing furnace and the furnace is heated after the furnace is vacuumized, the furnace temperature is kept, a longitudinal magnetic field and a transverse magnetic field are exerted on the magnetic material through an alternating pulse current A and an alternating pulse current B, and cooling isconducted; after the thermally-processed soft magnetic alloy magnetic material ring is attached to double-sided adhesive tape with a PET base material to form a tape-covered magnetic material strip belt, ultrasonic vibrating, roller pressing and smashing are conducted on the tape-covered magnetic material strip belt to form soft magnetic alloy roller pressing strip belts, and the soft magnetic alloy roller pressing strip belts and multiple pieces of double-sided adhesive tape are overlapped alternately and pressed into a soft magnetic alloy composite overlapped strip belt of a sandwich structure. The magnetic material processed through the method has the advantages of being high and constant in magnetic conductivity, high in frequency and temperature stability, low in high-frequency vortex loss and high in electromagnetic transmission and conversion efficiency.

Description

technical field [0001] The invention belongs to the field of wireless energy transmission and electromagnetic shielding application of magnetic materials in power electronic magnetic components, and in particular relates to a processing method of magnetic materials for electromagnetic shielding. Background technique [0002] In recent years, with the popularity of smartphones, digital cameras, tablet computers, and other small portable mobile devices, people's lives have become more and more enriched. As the functions of these electronic devices become more and more powerful, their power consumption also increases accordingly, so in order to maintain their normal use, they need to be charged frequently. However, the charging process of traditional electronic equipment is completed through a set of chargers and data lines, which leads to the complexity of the charging interface, charger and data lines of the current electronic equipment, and its interface is not uniform, ofte...

AI Technical Summary

Problems solved by technology

This mechanical impact fragmentation process has the advantages of simple process, easy operation, and low processing cost, but most of the fragmented particles are irregular, rough, and uneven in size, and there are a large number of large particles locally. Particles and debris, and even the shortcomings of uncontrollable microstructure such as local chip loss and hole anomalies

Under the condition of high-frequency electromagnetic field, this kind of microstructure abnormality may cause magnetic flux leakage, and the eddy current effect inside the large-scale scale particles is relatively large, the magnetic loss of the entire magnetic material sheet is uneven, and its local heating is serious, and its performance is consistent. Poor performance, the magnetic isolation effect of its electromagnetic shielding may be reduced under application conditions such as wireless charging, and the high-frequency loss is large, which may easily lead to low charging efficiency, and even abnormal heating of the battery and metal electronic components on the back

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