This paper summarizes the functions and application fields of magnetic separators, hoping to help those in need. First of all, we should understand the concept of magnetic separators: magnetic separators are materials that absorb electromagnetic wave energy and convert them into heat energy by using the scattering of electrons caused by thermal motion of lattice electric field of functional components and the interaction between electrons and electrons. In order to achieve different shielding effect under different conditions, we can choose different thickness materials and different properties of magnetic sheet.
The manufacturing requirements of magnetic separators are described by the absorbing material factory
1) The requirements of magnetic sheet are: excellent magnetic properties, high permeability;
2) The magnetic loss of magnetic sheet in AC magnetic field is small;
3) The magnetic sheet has good flexibility, and it will not break when it fits, otherwise it will cause magnetic leakage.
The main functions of the magnetic separator are described by the absorbing material factory
1) EMC (shielding, absorption, suppression)
Absorbing material is a kind of functional composite material mainly absorbing electromagnetic wave. It can eliminate the back and forth reflection of electromagnetic wave in shielding cavity, reduce the interference of clutter on its own equipment, and effectively prevent electromagnetic radiation from disturbing and harming surrounding equipment and personnel. It is an advanced means to eliminate electromagnetic wave pollution. The application of absorbing materials in electronic equipment can absorb the leakage of electromagnetic radiation, which can achieve the purpose of eliminating electromagnetic interference. According to the law of electromagnetic wave propagating from the direction of low magnetism to high permeability in medium, high permeability ferrite is used to guide electromagnetic wave. Through resonance, a large amount of radiation energy of electromagnetic wave is absorbed, and then the energy of electromagnetic wave is transformed into heat energy through coupling.
2) Metal resistance (payment)
In RFID equipment, the electronic tag should be integrated or attached to the product. As a part of the equipment, the magnetic separator often has limited space, so it is inevitable to stick the electronic tag (usually passive) on the surface of metal and other conductive objects or near the place with metal devices. In this way, the tag under the action of the signal from the reader, the induced alternating electromagnetic field is easy to be attenuated by the eddy current of the metal, and the signal strength is greatly weakened, resulting in the failure of the reading process. Therefore, it is necessary to add metal resistant absorbing materials to improve the card reading sensitivity.
3) Magnetic isolation (Wireless charger)
The wireless charger changes from 220 V power supply to a sympathetic electromagnetic field, and then the sympathetic electromagnetic field generates a sympathetic electromagnetic field, and then the sympathetic electromagnetic field turns into current charging; when the sympathetic electromagnetic field encounters metal, it will produce electronic eddy current, which will produce skin effect on the metal, generate heat energy on the metal, reduce the charging efficiency and waste electric energy. And the interference to the main board of the line affects the normal operation of the whole charger. The efficiency can be improved by providing a circuit for the sympathetic magnetic field with a high magnetic flux by using a magnetic absorbing material.
Wireless filling and isolating disk
Shenzhen Jingju microwave absorbing material manufacturers focus on the R & D, production and sales of microwave absorbing materials, EMI shielding materials, digital plate magnetic separator, hand-painted board magnetic separator, anti magnetic sheet, NFC magnetic separator. The products are widely used in wireless charger / mobile phone / tablet / digital board, etc., welcome to patronize!!!
Absorbing material: www.goodsmaterial.com