- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
English
Views: 1 Author: Site Editor Publish Time: 2024-05-14 Origin: Site
The inclusion of magnetic shielding plates on wireless charging coils is a well-established practice in the industry, and understanding their purpose is crucial to comprehending the functioning of wireless charging technology. Let's delve into the reasons behind the incorporation of these shielding plates and their significance in wireless charging systems.
Magnetic shielding plates are thin magnetic materials, often produced through high-temperature sintering, placed on both ends of wireless charging coils. These plates serve as auxiliary components to the charging system. Typically, there are two types of shielding plates: soft magnetic plates on the receiving end (which are thin) and hard magnetic plates on the transmitting end (characterized by their sturdy yet fragile nature, with thickness ranging from 0.1 to 0.8 mm).
Wireless charging operates on the principle of electromagnetic wave induction, utilizing electronic components to transfer power. In this process, the transmitting coil generates an electromagnetic signal when connected to a power source, while the receiving coil detects and converts this signal into electrical current to charge the battery.
The primary functions of magnetic shielding plates in wireless charging systems are as follows:
Enhancement of Magnetic Flux Density: The presence of magnetic shielding plates increases the magnetic flux density within the coils. In regions with higher magnetic field strength, there are more magnetic flux lines. Shielding plates possess a magnetic convergence effect, effectively concentrating magnetic flux lines. This concentration leads to higher magnetic induction, resulting in a greater magnetic flux. Ultimately, this maximizes the transmission of magnetic field energy from the transmitting coil to the receiving coil, thereby improving the efficiency of electromagnetic conversion.
Isolation of Metal Objects from Electromagnetic Signals: Metal objects within the magnetic field can absorb and attenuate electromagnetic signals, thereby reducing electromagnetic conversion efficiency. By attaching shielding plates, the contact between metal objects and electromagnetic signals is effectively isolated. This isolation minimizes signal attenuation, effectively acting as a barrier against magnetic interference.
Increase in Heat Dissipation Area: Higher magnetic field intensity corresponds to increased heat generation within the charging coils. If this heat is not efficiently dissipated within the circuit, it can accumulate and potentially damage electronic devices. The heat experienced during wireless charging is a result of this phenomenon. By integrating coils, magnetic plates, and circuit boards into a unified assembly, the contact area of the inductive coils is maximized. This design facilitates effective heat dissipation by dispersing heat and transferring it away from the coils, thereby reducing heat generation per unit area.
In summary, magnetic shielding plates play a vital role in enhancing the efficiency and reliability of wireless charging systems. By optimizing magnetic flux density, isolating electromagnetic signals from metal objects, and facilitating heat dissipation, these plates contribute to the overall performance and safety of wireless charging technology.
