inductive resonance wireless power

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roronoa

Joined: 04 Dec 2007
Posts: 21

23 Oct 2009 16:52 inductive resonance wireless power

hi everyone, i hav a project which involve using inductive resonance to produce wireless energy and then create a cell phone charger using that.

the problem now i faced is i have difficulties getting the power transfer efficiently.
wat i have done is, i come out wif the primary coil and a secondary coil both connected to a capacitor parallely.Can anyone tell me any equation to get the coil to transmit power in a maximum rate.

i have been designing the coil using the formula 2(pi)f=1/√LC to find the resonance frequency,but when i test my circuit it seems that all frequency gives the same output AC voltage which is arround 250mV peak to peak(My primary coil input is a 10V AC ,calculated the resonance frequency is 90kHz)

any suggestion or recommendations?

thanks alot.

Last edited by roronoa on 24 Oct 2009 3:33; edited 1 time in total

flatulent

Joined: 19 Jul 2002
Posts: 4875
Helped: 324
Location: Middle Earth

23 Oct 2009 21:17 Re: inductive resonance wireless power

This method is always inefficient unless the spacing between the coils is small compared to their diameter. Pancake wound coils work best. Attached is a paper on the subject.

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breadpig

Joined: 30 Oct 2009
Posts: 3
Location: singapore

30 Oct 2009 15:35 Re: inductive resonance wireless power

hi

im also doing this project on wireless resonant inductive coupling.im trying to learn how to simulate now but i could find the appropriate tutorials on hfss on square coil antenna.could you share wif me about ur simulation?

rgds
Alex