By attached to the coil, increase the coil inductance,reduce the metal caused by vortex flow resistance of heat, metal coil in magnetic interference, improve the charging efficiency.
WLS120 series of ferrite sheet for wireless charging products as a Shenzhen Penghui high-end used in consumer electronics wireless charging module of magnetic, this series of products without glue have 0.05mm, 0.10mm, 0.20mm, 0.30mm, 0.50mm thickness (such as large customer usage, can customize other special thickness), can meet the customer demand of all kinds of wireless charging application, moderate price, excellent performance, favored by customers.
At present, most ferrite sheet for wireless charging products on the market are based on QI standards, and the principle of QI standards is that electromagnetic induction generates electric current, so in all wireless charging products, an indispensable accessory is the diaphragm.
The processing and assembly of magnetic diaphragm is very important, which is directly related to the performance and user experience of the entire wireless charging product, so both manufacturers and consumers should pay great attention to this. First, let’s understand the relevant knowledge of magnetic diaphragm:
In general, the role of the diaphragm usually has three points: magnetic conduction, magnetic conduction, heat conduction.
As we all know, the principle of QI wireless charging standard is electromagnetic induction. The primary coil (wireless charging transmitter) generates an interactive magnetic field (the strength direction is constantly changing). In order to apply the magnetic field energy emitted by the primary coil on the secondary coil (wireless charging receiver) as much as possible, the magnetic field of the primary coil needs to be guided.
After adding the magnetic diaphragm at the receiving end, the magnetic line is obviously concentrated, while without the magnetic plate guide, the magnetic line is relatively scattered.Here the receiving end magnetic sheet plays a magnetic conductive role, providing a magnetic force line circuit to the transmitting end magnetic field, thus gathering the magnetic field so that it can act as much as possible on the coil of the receiving end to achieve the maximum power generation efficiency.
The magnetic diaphragm should not only effectively conduct magnetic conduction, but also play the role of magnetic resistance. Why the magnetic blocking? It is known that when a changing magnetic field encounters a conductor such as a metal, a current current is generated if the metal is a closed wire, and if the metal has an eddy current effect on a non-closed wire, especially a whole metal.
Eddy currents generate a lot of heat, like induction cookers, using the vortex effect to convert electricity into heat.
But in wireless charging products, we need to prevent the device from heating up as much as possible, because the heat not only consumes too much electricity, but also causes damage to the electronic devices. To avoid heating, it is necessary to constrain the magnetic field generated by the transmitting end, so that the magnetic field can only act on the receiving end coil, but not on any other device than the coil.
The magnetic field acts on the coil to produce a high-frequency current, in which the coil itself generates heat, which accumulates if not effectively emitted. Sometimes we feel the heat when charging. It is generally caused by coil heating or circuit board heating.
In order to effectively transmit the heat of the coil and the circuit board, the packaging method is generally adopted:
The coil, magnetic diaphragm, circuit board through the low temperature and low pressure IC packaging process with heat-conductive resin material complete packaging, so as to effectively disperse the heat and achieve good heat dissipation effect.
At present, ferrite sheet for wireless charging is widely used in the research and application of wireless charging industry. This is mainly due to the advantages of ferrite sheet for wireless charging. First of all, the structure of ferrite sheet for wireless charging is very stable, to ensure the durability of the charging equipment, in fact, the ferrite sheet for wireless charging can be mass-produced, ensuring that the wireless charging technology can be mass-produced. In addition, ferrite sheet for wireless charging also has a good cost advantage, because its manufacturing and design costs are very low, so it also has a price advantage when using it.
Ferrite sheet for wireless charging materials, materials that are easy to magnetize and easy to demagnetize under weak magnetic fields. There are mainly zinc-chromium ferrite and nickel-zinc ferrite. It is a ferrite material with wide application, variety, large quantity and high output value. It is mainly used to make various inductive components, such as filter cores, transformer cores, wireless electromagnetic cores, and tape recording and video heads, etc. It is also a key material for magnetic recording components.
The ferrite sheet for wireless charging produced by our company are all made of high-quality raw materials, and the product quality is guaranteed. If you have any questions about our products, you are welcome to consult us.
PH mainly produces absorbing sheet, EMI suppression sheet, sintered ferrite sheet, electromagnetic shielding coating and other electromagnetic functional materials. It is the first national high-tech enterprise in China that focuses on the R&D, production and sales of sheet absorbing materials and electromagnetic shielding coatings. The products are sold to all over the world and are well received by the industry.
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