How wireless charging works?

     Now a days everyone is having smartphone in their hands. We will be using it through out the day and end up charging it in the evening. Most probably we will be using wired charging. Think about the technology, using which you can charge your smartphone wirelessly while you are holding your smartphone. This technology is called wireless charging.

     Today I will be explaining you, how wireless charging works? It's advantages and disadvantages. So, let's get started.

     The most popular wireless charging technology is the inductive wireless charging. In 1831, Michael Faraday invented electro magnetic induction. He discovered that in the presence of alternating magnetic field, electromotive force is produced in the conductor. In 1984, Nicola Tesla uses this principle and demonstrated an experiment by lighting an incandescent bulb wirelessly by resonant frequency. By using the same principle modern motors are designed.

     The wireless charging technology uses only less components. It will be having an oscillator circuit. Above that a transmitting coil will be present.

     When alternating current flows through the coil, it produces magnetic flux. Flux density will be dependent on certain parameters.

     Then the flux links the receiving coil and produces electro motive force. This will produce flow of current and the device get charged.

     One of the major drawback of inductive wireless charging technology is less efficiency. It is able to produce only 60% efficiency. So, if more people uses wireless charging then the load on the power grid gets increased which may demand in more electric energy production. 

     Let's see this with the real time scenario. When iPhone X was launched, it was sold around 30,000,000 units. It has wireless charging technology. So, if everyone uses wireless charging then it will cause an energy demand of 278 MWh. To compensate this we need 1,400 wind turbines extra. It looks insane.

     Only 29% of people who have wireless charging devices are using wireless charging. So we are not facing the energy demand.

     We might have came across wireless charging where we need to keep our device over a pad. Now the problem is we won't be able to use it comfortably. Now companies like Pi are trying to create a product using which you can charge your devices just by coming into the range of the device. But this is just a prototype or idea. Companies are working on it to increase efficiency and reduce heating problem.

     Tesla electric cars will be needing electric charging. It is difficult to find a Tesla charging station. So, some companies have developed inductive wireless charging technology devices which you can place in the parking area. Cars will automatically detect the device and move to it and gets charged. 

     That's how wireless charging works. Thanks for reading. If you found this useful then share with your friends. To know more about technology and get updated, subscribe to the blog. Subscription box will be below the page. Have a nice day.