What is the principle of wireless power supply? How to make one of the simplest wireless power supply

Scientists have long since discovered that **** vibration is a very efficient way to transmit energy. We've all heard stories such as the collapse of an iron bridge caused by *** vibration, an avalanche, or a soprano shattering a glass. Regardless of the credibility of these stories, their basic principle is correct: energy can be transferred efficiently between two objects that vibrate at the same frequency with little or no effect on objects that vibrate at different frequencies. In this new technology of Marin, the coils at the sending and receiving ends are tuned into a magnetic *** vibration system, and when the frequency of the oscillating magnetic field generated at the sending end is the same as the intrinsic frequency of the receiving end, the receiving end generates *** vibration, which enables the transmission of energy. According to the properties of **** vibration, the energy transfer is all inside such a **** vibration system, and will have little effect on objects outside this **** vibration system. It's like several glasses with different thicknesses won't blow up at the same time because of the same frequency of sound.

The best part is this. When the transmitting end is energized, it doesn't emit electromagnetic waves outward, but simply creates a non-radiating magnetic field around it. This magnetic field is used to contact the receiving end and excite the receiving end's **** vibration, thus transmitting energy at the cost of very little consumption. In this technology, the strength of the magnetic field will be no more than similar to the strength of the Earth's magnetic field, and people will not have to worry about the adverse effects of this technology on their bodies and other devices.

When Marin demonstrated his results in 2007, the technology was able to achieve about 40 percent efficiency. That's acceptable in some settings, but people want to go further. The Intel researchers we just mentioned have increased transmission efficiency to 75 percent, and Marin's group recently claimed that they did 90 percent. That means an improvement to more than double the original between one year!

While the results are impressive, there's still plenty of room for improvement, too. The next step is expected to be to reduce the size of the transmitter and receiver while increasing transmission efficiency, and ultimately to realize the goal of having a receiver built into power-using devices.

Imagine what this could mean for your life. We'll be able to place appliances exactly where we need them, without having to think about whether or not there's an outlet nearby; we won't have to think about how to run wires when we're decorating a room; small electronic devices like laptops and cell phones will always have their batteries fully charged; and robots will be able to run around the room without having to find a place to recharge after a while... ...that day may soon come. There are already a few prototypes on the market using this technology, and it's only a matter of time before it becomes widely available.