Wireless Power transfer || Electrical Project

In today’s world, technology is constantly evolving to simplify our lives. The advent of mobile phones has revolutionized the way we communicate, merging traditional landline systems with cutting-edge radio engineering. As mobile technology advances, we enjoy services like texting and internet access, but one thing remains constant: the need for wired battery chargers.

Every phone comes with its own charger, and we’re accustomed to carrying them everywhere for battery backup. But imagine a world where your phone charges automatically when placed on a table during a coffee break. This article introduces a simple wireless battery charger circuit that charges your mobile device when it’s near the transmitter. This circuit can be used for wireless power transfer, wireless mobile charging, or wireless battery charging.

Wireless Battery Charger Circuit Principle:

This circuit operates primarily by using mutual inductance. What happens is that power gets transmitted from one part (the transmitter) to another (the receiver) wirelessly. This is all based on a principle called “inductive coupling.”

Inductance is a property that conductors have. When there’s a flow of electric current through a conductor, it can cause a voltage or what’s called an electromotive force in that conductor or in another nearby conductor. There are two main types of inductance: self inductance and mutual inductance.

Now, let’s talk about “mutual inductance.” This is when you have one conductor with an electric current running through it near another conductor. What happens then is that the first conductor creates a magnetic field around it because of the current flowing through it. This magnetic field then interacts with the second conductor, inducing a voltage in it. So, in simpler terms, you can think of it as two wires communicating with each other through magnetic fields.

How to operate this Wireless Power Transfer Circuit?

• Initially, connect the circuit as shown in the circuit diagram.
• Switch on the supply.
• Connect the battery charger at the output of the circuit.
• Place the receiver coil near the transmitter coil .
• You can observe the charging of battery.

Product Video

Wireless Battery Charger Circuit Advantages:

• Usage of separate charger is eliminated.
• Phone can be charged anywhere and anytime.
• It does not require wire for charging.
• Easier than plug into power cable. 

Wireless Power Transfer Circuit Applications:

• Wireless chargers can be used to charge mobiles, camera batteries, Bluetooth headsets etc.
• This can also be used in applications like car battery charger with little modification.
• This can also be used in medical devices.

Limitations of the Circuit:

• Power is somewhat wasted due to mutual induction.
• It will work for very short distances only. If you want to use it for long distances, then the number of inductor turns should be high.

Package Includes

• 1 X Wireless Power transfer