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GoIrish
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Wireless Battery Charger - 2007/07/19 12:19 This thread discusses the Content article: Wireless Battery Charger

All I can say is, "wow." Great work, Chris.

Only thought would be that the M2-atx psu has coil loops on them (transformers?)- curious if the field generated by the charger would affect the output of the power supply. I suppose the case would provide shielding? The motherboard has coils as well.

Post edited by: GoIrish, at: 2007/07/19 04:30
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c6jones720
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Re:Wireless Battery Charger - 2007/07/19 17:20 Only thought would be that the M2-atx psu has coil loops on them (transformers?)- curious if the field generated by the charger would affect the output of the power supply. I suppose the case would provide shielding? The motherboard has coils as well.

This is something that I might need to have a little look into. Before I built this I did ask Tom what the power specs were for the M3 and M2, so I could match my charger to them. What I can say is that the field of the wireless charger is highly directional and at the robot end I'm rectifying it into DC. In theory as long as the coils are nowhere near the M2 PSUs or hard disk I dont anticipate any sorts of problems.

In my industrial experience of working with magnets, magnetic shielding can difficult to get right in practise. To shield one magnet from another you need a material that has its own (often static) magnetic field, you end up with a Russian doll situation. I did research into Faraday cages for this too, but they dont cut the mustard for magnets.
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lilytherobot
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Re:Wireless Battery Charger - 2007/07/19 23:58 Fantastic - could be a very viable docking solution for the 914 too.

If one of the coils could be electromagnetic so that the robot can control whether to turn the magnet on or off, then docking and un-docking could be made easier for the 'bot.

Wireless power is right around the corner however, a number of companies (including MIT) have anounced breakthroughs in wireless power and have demonstated products are various trade shows. We should start to see commercial products late this year, or early next.

One such company is ecoupled:

http://www.ecoupled.com/

Dave...
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