A breakthrough 100 years ago has led to today’s convenient new charging technology
When we think of electricity, most of us automatically pull the wires, which makes it difficult to connect the proper cables to the back of the television, electricians looking at the colorful wire maze in the electric box – or picking up your phone charger when your battery level is low.
These days the number of wires required for our electrical devices is ever decreasing, and wireless power is now reviving electronic devices without the need for a physical connection. Wireless power technology uses charged cells to transmit energy between devices before being converted back into electrical energy.
In 1890, Nikola Tesla showed the world that wires were not needed in the transmission of electricity. Using two copper wires, one primary coil can withstand a huge amount of charge.Once at maximum charge, the voltage is sent into the gap between the coils, reaching the secondary coil, which was then able to produce lightning bolts. His ‘Tesla Coil’ first demonstrated this concept, and while progress alone stands alone as a breakthrough, it has been more than a century since technology was used commercially.
Now wireless charging offers a wide variety of advantages and possibilities, which vary depending on how far the energy is transported. Near-field applications use magnetic fields, but longer distances, such as space applications, require more complex methods with microwaves. This is often called power beaming.
• Phone Contact
The phone can be placed on or near the charging device. It works at distances up to 45mm.
• Magnetic Charging plate
The charging plate is AC-powered. They are magnetically connected when placed on top of the phone. The excited energy moves through the gap through the magnetic field generated by the AC current.
• Coil Communication
The magnetic field created between the phone and the plate triggers the voltage used to charge the phone.
• Key Components
The transmitter coil of the plate and the coil in the phone should be close. The phone must be fitted with this coil for wireless charging to work. The current is converted to high-frequency alternating current (AC) by a special transmitter coil and then again by the receiver.