What is Wireless Charging Technology?

what is wireless charging technology

Is charging a mobile device without cords or cable possible?

Wireless charging technology is the general term used to describe equipment that doesn’t make use of cables and cords while charging a battery. This technology uses electromagnetic fields to transfer energy from one object to another through electromagnetic conduction.

Right now, we have wireless chargers for cars, for mobiles, and some others devices that use a battery and also need to be charged.

Let’s take a closer look at how the technology works.

How does the wireless charging technology work?

Wireless charging technology uses an electromagnetic field and inductive coupling which was First discovered in the early 1830’s by Michael Faraday. Nikola Tesla, another scientist who lived in the late 1800s discovered AC (alternating current) based electricity which forms the basis for wireless charging technology.

This magnetic field and inductive coupling are used to send energy from point A (transmitter) to B (receiver). Some chargers use an induction coil to create an alternating electromagnetic field from within or inside the charging base station.

A second coil in the mobile device receives energy from this electromagnetic field and converts it back into electrical current in order to charge the battery.  

How wireless charging technology works
(Image credits – Thomson Reuters)

While the earlier versions of wireless charging technology involve bringing the device closer to the chargers, the latest versions such as the one at wi-charge can charge a phone from across the room. These kinds of products can serve homes, offices, factories and public spaces.

How Safe is Wireless Charging Technology?

To build an efficient and effective wireless charging system, you need to reduce the magnetic field closely around the copper wire loops by using a special material called ferrites (interstitial solid solution of carbon in body-centered Cubic Iron) which are conductors of a magnetic field.

Therefore, the magnetic field has to flow through the ferrite. Magnetism or magnetic fields are not seen it can only be touched and can felt.

In summary, wireless charging technology is made safe by not allowing the magnetic field to come out of the wire and this only happens in very rare cases.

Advantages of Wireless Charging technology

  1. Wireless charging is commonly used in medical devices and food products where electrical shock or bacteria levels must be kept to a minimum and no electrical contacts are allowed to avoid causing harm to the users.
  2. Wireless charging reduces the number of cables and power adapters you need to customize a manufactured device or application
  3. It can be a good solution to charge your battery at a very convenient time.
  4. It can be used by any compatible device or smartphone.

Disadvantages of Wireless charging technology

  1. It is known that wireless charging lacks efficiency compared to cable or cord chargers, therefore, it is still not perfect. There are certain wireless chargers which simply cannot reach the same efficiency level when compared to cable or cord chargers. This deficiency can make the charging process slower. Also, heat generated by the wireless chargers is much higher compared to its conventional ways of charging a battery or a device.
  2. Since it makes use of signals, it cannot be taken from one place to another because of the signals transmitted between your mobile phones and the charger which are wireless, but you still need to plug the charging station to a wall. This practice makes all the charging stations non-portable. One also has to keep the device on the pad at all times and it cannot be moved. This makes it difficult to operate the phone while it is being charged.
  3. There have also been compatibility issues with some smartphones, so it may not really charge all devices despite the fact that it is wireless.

Rounding Up

The prospect of charging phones without wires is definitely responsible for the numerous opportunities that abound in the wireless charging market for young Africans.  These set of new innovative products has the potential to improve efficiency in the charging of device but is not so popular across Africa.

If you’re looking to head down the tech career line then you could consider filling in the need to bring wireless charging technology to mainstream in Africa.

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