What is Wireless Charging?

Wireless Charging is almost 100 years old but now it came in fashion to use. Wireless Charging is the method of charging a battery powered device or equipment without the need for a wired electrical powered connection. Wireless Charging enables wireless transfer of electrical charge from a charging device to the receiving device. The Wireless Charging technology uses an electromagnetic field and inductive coupling to transfer energy from a Transmitter Point to the Receiver Point.

Wireless Charging is also known as ‘Inductive Charging’ or ‘Cordless Charging’. Induction Chargers use an Induction Coil to create an alternating electromagnetic field from the charging base, and a second induction coil in the portable device takes power from the generated electromagnetic field and converts it back into electric current to charge the battery.

Example: Modern Smart Phones, Portable Electronics and Devices, Qi Devices, Furniture, Vehicles, Dual Standard, Research and other.

Wireless charging is operational through three different forms are as following:

1. Inductive Charging - Uses Electromagnetic waves to transfer energy,

2. Radio Charging - Uses wireless Radio Waves to transfer energy to small devices and,

3. Resonance Charging - Uses Copper coil to generate alternating Electromagnetic Field to transfer energy from sender copper coil to receiver copper coil, used in charging large devices and equipment.

How Wireless Charging Works?

Wireless Charging works by transferring energy from the charging pad to the receiver by using the Electromagnetic Induction phenomenon. The Charger uses the copper wired induction coil to create an alternating electromagnetic field and which was received by the receiver coil in the device which converts back into electricity to recharge the battery of the phone.

The sender node and receiver node had to be near to close each other correctly placed over the top of each other. In case of Smartphones wireless charging pad, the copper coil are only a few inches in diameter i.e. a small coil size is needed to charge the smartphone. As the size of the coil increases, more energy can be transferred wirelessly which is useful for charging large devices like, Laptop, Cars, Robots etc.

Advantages of Wireless Charging:

1. Low infection Risk: Wireless charging is very useful in embedding medical devices. It transfers power with magnetic field passing through the skin and avoids the skin infection risk which may cause by insertion of the wire.

2. Protected Connection: The closed device doesn’t get in contact with oxygen and water, which avoids Corrosion. Save devices from any kind of electric fault or short-circuit.

3. Increased Durability: Wireless Charging doesn’t require to plug or unplug the device, which saves the device and connectors from receiving any type of harm.

4. Convenient to use: The Wireless Charging is an easy and convenient way to use and saves from the irritating tangled wires because it needs no wire at all between the charger and the device.

Disadvantages of Wireless Charging:

1. Slow Charging: Due to lower efficiency, wireless charging device requires more time to charge the gadgets.

2. Expensive: Wireless Charging is applicable only for the devices made for wireless charging. It increases the complexity and manufacturing cost.

3. Inconvenience: While charging it becomes very inconvenient to use the device because the device needs to be in contact with the charging pad. Whereas, while charging through cable this problem doesn’t arise, can move mobile freely as the length of wire allows.

4. Heating issue:Smartphones usually get heat up while charging through wired, but this heating up issue may be a matter of concern while using wireless charging method.