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| View Original: | Wireless power system - inductive coupling.svg (1499x633) | |||
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| Keywords: Wireless power system - inductive coupling.svg wireless power system that works by nonresonant inductive coupling electromagnetic induction It works like a transformer It consists of a transmitter unit consisting of an oscillator that produces an alternating current of the correct frequency in a primary coil The alternating current produces an alternating magnetic field B green which extends to the secondary coil in the receiver unit and induces a voltage in it by Faraday's law of induction The alternating current in the secondary is rectified to DC if DC is needed and powers a load This is a simplified version of how wireless charging units for portable devices like the Qi and PowerPad systems work Wireless charging stands for tools such as electric toothbrushes operate at mains frequency 50/60 Hz and so do not need the oscillator but must use an iron core inside the coils in order to transfer power at low frequencies 2014-12-22 own Chetvorno other versions thumb left de version cc-zero Uploaded with UploadWizard Wireless energy transfer | ||||
