What are the potential dangers and advancements in wireless power transmission?

In summary: Interesting article on using microwave transmission for power. Seems the technology has been outdated for a more optical approach, but the demonstration seems sound enough.
  • #1
MedievalMan
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Nothing new, ofcourse, in principle. Tesla experimented with it many years ago ;)

It has worked somewhat efficiently on a small scale (see http://electronics.howstuffworks.com/wireless-power.htm)

The beginning of this article mentions how it is dangerous, but the end says we may need to someday beam lots of power from solar panel satellites and/or a moon base to get some more power to meet growing demands.

My thoughts are:
Using microwave frequency EM waves, at very high power levels (even if MIT research gets them to be very directive, instead of spreading out equally in all directions) seems kind of dangerous to me.

Any thoughts from fellow engineers, physics gurus or hobbyists? :)

Had to mention the Tesla Roadster:
http://auto.howstuffworks.com/tesla-roadster2.htm
 
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  • #2
MedievalMan said:
Using microwave frequency EM waves, at very high power levels (even if MIT research gets them to be very directive, instead of spreading out equally in all directions) seems kind of dangerous to me.
That greatly understates it. Yes, such schemes are too similar to hypothetical death rays. It sounds like the Diamonds are Forever James Bond film.

Besides danger, the economics of space-based PV panels are very unattractive.
 
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All these space-based ideas for Power Generation ignore the fact that we are really not short of land area for solar projects. The day / night effect on surface arrays could be said to be relevant, compared with near 24 hour coverage for a satellite but that seems, to me, to be the only thing in favour of the space borne approach. Just how overall efficient would the energy conversion be for the Power Down-link? Massive areas would be needed for receiving arrays plus large exclusion zones would be needed around the sites.
True- the reliability of orbiting equipment is extremely good and there are always possible effects of weather and life forms on land based equipment. But it's much more convenient to maintain and it can be sited to suit the community. HV DC transmission wire links are very good value.
 
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1. What is wireless power transmission?

Wireless power transmission is the process of transferring electrical energy from a power source to an electrical load without the use of physical wires. This is typically achieved through the use of electromagnetic fields.

2. How does wireless power transmission work?

Wireless power transmission works by using a power source, such as a battery or power outlet, to generate an alternating current (AC) signal. This signal is then converted into high frequency electromagnetic waves, which are transmitted through the air to a receiver. The receiver converts the electromagnetic waves back into electrical energy, which can then be used to power devices.

3. What are the benefits of wireless power transmission?

One of the main benefits of wireless power transmission is convenience. It eliminates the need for physical cords and allows for more flexibility in device placement. It also reduces the risk of electrical shocks and eliminates the need for frequent replacements of traditional cords and batteries.

4. Are there any potential risks associated with wireless power transmission?

While wireless power transmission is generally considered safe, there are some potential risks to consider. The use of high frequency electromagnetic waves could potentially interfere with other electronic devices. There is also a concern for potential health risks, although studies have shown that the levels of electromagnetic radiation from wireless power transmission are well below safety limits.

5. What are some current applications of wireless power transmission?

Wireless power transmission is currently being used in various applications, including charging smartphones and other small electronic devices, electric toothbrushes, and even electric cars. It is also being explored for use in larger scale applications, such as powering entire homes or cities.

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