SCRIPT PRESENTATION HELLO, GOOD AFTERNOON everyone My name is irvan maulana in this presentation, I would like to talk about wireless charging okay before entering into the material, do you know what is Wireless Charging? or do you know how to transfer energy without using cables? Wireless charging is to supply electrical power from a wall outlet to your device, without connecting cable. of course this technology makes it easier for us, we can charge the battery comfortably without fear of damaging the port,because of the use of cables that are not careful. now this technology can be used to charge several brands of mobile phones. and maybe in the future many devices use this technology such as electric cars and laptops. Wireless charging uses the electromagnetic induction principle from Michael Faraday and In the late 1800s Nikola Tesla had applied it with a device called resonant inductive coupling, the device could turn on incandescent lamps wirelessly. wireless charging parts 1. 2. 3. 4. 5. 6. Supply AC 220V Electric oscillator circuit Transmission coil Coil receiver Rectifier and stabilizer Battery CARA KERJA 1. when you connect the circuit to an AC 220 V power source. then AC current flows to the oscillator circuit 2. in the oscillator circuit the ac current is changed to a higher frequency 3. then flowed to the transmitter coil 4. when the ac current flows on the transmitter coil, it will produce a magnetic flux 5. when within a certain distance the magnetic field induces the receiver coil. The process is called magnetic coupling or resonance and the process occurs by two coils resonating at the same frequency. 6. The magnetic field that induces the receiving coil will produce alternating current. 7. then the alternating current is converted into direct current (DC) with a rectifier circuit and the voltage is stabilized with a stabilizer circuit. then it can be used to charge the battery
