In May, Apple submitted a "wireless power system" patent displayThis innovative idea. Unlike previous battery cases, this new design does away with the lightning protection connector in favor of two-way wireless charging technology. According to the patent, the new battery case will be equipped with two sophisticated "switching circuit" wireless charging coils, which means that it will not only charge itself, but also power a connected iPhone or other wireless device, enabling true wireless interaction.
Apple's new patent reveals new possibilities for wireless charging Recently, a new patent submitted by Apple has aroused wide attention in the industry. Unlike the common NFC technology on the market, Apple's patent seems to be aimed at wireless chargingPractical application and efficiency improvement of electrical technology.
The patent doesn't detail specific application scenarios, and we can only expect Apple to reveal how it actually works in a future release. Apple has always been, even after the iPhone 5 was questioned by the outside world lack of innovation, but its actual actions still show the pursuit of practicality and perfection. Wireless charging is not new to Apple, and the introduction of panoramic photography is not new, but Apple has always been able to optimize the technology to the best.
Verdict: A new Apple patent reveals a revolutionary wireless charging technology that will leave the shackles of contact charging behind,Use it to ensure the integrity of communication. ZigBee does not require the synchronization mechanism of Bluetooth, so the power requirements are significantly reduced. 2, Legal analysis: The so-called standard contract refers to those parties for future reuse in advance, and in the actual conclusion of the contract without individual consultation with the other party. For example, common standard contracts include insurance contracts and auction sale confirmations. These contracts often need to be reviewed or filed by a specific department, such as labor contracts. Standard contracts are usually named contracts that exist in writing and are explicitly listed in the contract law.
3. [Difference 1] WIFI is included in WLAN, and the power of the transmitted signal is different, and the coverage is different. (1) From the perspective of inclusion relationship, WIFI is a standard of WLAN, WIFI is included in WLAN, which is a new technology in the WLAN protocol. (2) The coverage range of WiFi can reach about 300 feet (about 90 meters), and the maximum WLAN (plus antenna) can reach 5KM. [Difference 2] The range of wireless signals covered is different.
4, literally means there is no standardized protocol. Now the protocols in the field of communication are basicIt has been standardized by international TIA/EIA and other relevant agencies, and has been recognized and followed globally.
What are the components of wireless charging? The left side is TX, that is, the transmitter, and the corresponding product is the wireless charging transmitter. On the right is Rx, that is, the receiving end, and the corresponding product is a mobile phone with wireless charging function. TX end: MCU, power full bridge, and LC resonant Tank composed of inductor and capacitor, where inductor is the emissionThe end coil.
There are two kinds of power supply for the radio energy transmission unit: 220V AC and 24V DC (such as automotive power supply), which is selected by relay J. In accordance with the principle of AC priority, the normally closed contact of relay J in the figure is connected to DC (battery BT1). Normally, S3 is connected.
This circuit diagram uses the chip sl1052 as the control, the structure is simple and the function is complete. Pin function 1 Power end. 2 Temperature monitoring input. 3 Charging status indicator. 4 Grounding terminal. 5 Adjust the tube driver. With the base of the external regulating tube. 6 ChargingTake control. 7 Current sampling input. The charging current is determined by the voltage difference between the power supply and this pin.
Electromagnetic induction type primary coil A certain frequency of alternating current, through electromagnetic induction in the secondary coil to produce a certain current, thereby transferring energy from the transmission end to the receiving end.
However, the load is generally designed for 2x U input. The larger the filter capacitance, the higher the output voltage, and the lower the vice versa. In a single-phase bridge rectifier circuit, if there is no filter capacitor, the output voltage is 0.9 times of the AC input voltage when the load is open, that is, U output =0.9*U input. When carrying a load, maleThe formula remains unchanged, still: U output =0.9*U input. This conclusion is applicable to both bridge and full wave rectifier circuits.
It's not high-tech, it's using magnetic fields! The charger has a coil, the battery has a coil, and when you put it close, it forms something like a transformer. But it's very inefficient, and it's very radioactive. The following picture is intel's wireless power transmission, which can light bulbs, but the efficiency is not more than 50%, and the radiation is huge. Wireless chargers are not yet popular and large-scale retail.
Introduction Wireless charging Tx to rx distance : Shenzhen Beland Technology Co., Ltd. focuses on wireless charging field wireless charging Tx to rx distance Product development and design, located in Longgang District, Shenzhen. Shenzhen Beland Technology Co., Ltd. independent research and development design and production of wireless charging PCBA, schematic diagram, programmer code, independent opening, their own mold production product shell.