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I have been able to calculate and fix components for the transmitter circuit of wireless power transmission system but I am still having some challenges. They are: 1. How can I calculate theoretically the gain of the mosfets? 2. How can I calculate the voltage induced at the receiver circuit? 3. How can I calculate the values of the components I can use to rectify the received voltage? I am working with 14MHz frequency.

Note: I tried to use the formular, coupling coefficient (K)* magnetic field (B) to calculate the induced voltage but I got a rediculously little number. So, I really need answers to help me move forward. I would also appreciate a better circuit diagram that can transfer up to 24 volts.

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  • \$\begingroup\$ What formula was it that you tried? What distance did you assume between tx and rx coils? What rx tuning capacitance did you use? \$\endgroup\$ – Andy aka Nov 2 '15 at 11:56
  • \$\begingroup\$ Also note that you are not transferring voltage, you are transferring inductive power. \$\endgroup\$ – Nedd Nov 3 '15 at 3:50
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Here are some app notes related specifically to this topic that may help:

http://cds.linear.com/docs/en/application-note/AN138fc.pdf

http://www.digikey.com/~/media/Images/Product%20Highlights/W/Wurth%20Electronics%20Inc/wireless-power-solutions/wurth-wireless-power-charging.pdf?la=en-US

and here is one with all boring the theory: http://publications.lib.chalmers.se/records/fulltext/175567/175567.pdf

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  • \$\begingroup\$ Thanks a lot, Nedd. I will go through these resources and get back to you. \$\endgroup\$ – Uche Ohajuru Nov 3 '15 at 14:58
  • \$\begingroup\$ But, when you say that what is being transmitted is inductive power, I really want to know more about that. Is there something like a formular to calculate that apart from the traditional formulae? \$\endgroup\$ – Uche Ohajuru Nov 4 '15 at 17:11
  • \$\begingroup\$ Hello Nedd. I tried to simulate a simple wireless power transmission system on Proteus but it is not working. Please, do you have any idea on what the problem might be? \$\endgroup\$ – Uche Ohajuru Nov 5 '15 at 17:09

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