This article gives you a talk about wireless charging FSK test circuit, and the corresponding knowledge points of wireless charger tester, I hope to help you, don't forget to collect this site. < / p > < h2 > the article directory list: < / h2 > < ul > < li style = 'margin - bottom: 3 px; list-style: none'>1. The mobile phone in the horizontal evaluationHow to test the efficiency of wireless charging
2. In order to simulate the real use environment, we use Apple iPhone 13 Pro and Huawei P50 Pro as fixed test machines. During the test, the power of the two mobile phones is first exhausted, and then they are respectively placed on the wireless charging board of the car for 15 minutes to test their charging efficiency. After charging, the back of the two phones was measured with an infrared thermometer to test the heat generated by the body.
3, therefore, inThe V DC terminal directly supplies power to the system. After passing through the power management module, the output direct current is converted into high-frequency alternating current through the 2M active crystal oscillator inverter to supply the primary winding.
Wireless charging system mainly adopts the principle of electromagnetic induction. Wireless charger refers to the charger that does not need to be connected to the terminal device that needs to be charged without the traditional charging power cord, using the latest wireless charging technology, through the use of the magnetic field generated between the coils, the magic transmission of electrical energy, inductive coupling technology will become a bridge connecting the charging base station and equipment.
Generally seen wireless charging, the use of "current magnetic effect" and "current magnetic effect"The principle of electromagnetic induction. In 1819, Danish scientist Elster observed that if there is an electric current on a wire, a magnetic field will be generated around it, which can deflect the north finger. Later generations have further found that the wire is encircled into a ring, or even wound into a coil, and the magnetic field generated will be stronger and more concentrated, which is called the "current magnetic effect."
No strong radiation, no effect on the human body! The main principle is: the way of wireless charging is electromagnetic induction, magnetic resonance, electric field coupling and radio wave transmission, etc. Most of the wireless charging of mobile phones uses the principle of electromagnetic induction.
WirelessCharging is also known as inductive charging or non-contact inductive charging, based on the principle of electromagnetic induction, it does not need to transmit electricity to the device like the traditional wired charger, but the device that needs to be charged can be charged by contacting the wireless charging base.
Hello, wireless charging uses the principle of electromagnetic induction, which is equipped with electromagnetic induction coils on the charging device and electromagnetic coils on the charged device.
You have normal no-load voltage and on-load voltageOn the low side. The no-load voltage is normal, indicating that your wireless charging transceiver circuit is normal, but the voltage is pulled down after the load, the most likely is that your coil matching is not good, resulting in insufficient power received by the output end, so the charging voltage will be pulled down.
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 transmitting end lineCircles.
Wireless charging technology is the use of electromagnetic induction principle, in the sending and receiving end with the corresponding coil to send and receive the induced current to charge.
There seems to be a problem, the backfilling problem. However, the output end of the wireless charging receiving module is generally through bridge rectification, and the reverse charge is not charged, but the working frequency of the wireless charging transmitting module is higher, and the received charging power signal will still be short-circuited by the high frequency of the charging head. The solution is to add a high-frequency diode to the output of the wireless charging receiving module for isolation.
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