Wireless mobile charger design

Thread Starter

Anotida Mushayavanhu

Joined Nov 22, 2020
24
Hello guys .I am working on a wireless charger project. Basically if consists of a step down transformer , inductors , Full wave rectifier , smoothening capacitors and voltage regulator.. I want to include a transistor switching circuit but I am struggling to know where and how to put it . May you kindly assist me on whether a switching circuit is necessary? And also what can i do to improve my project.?Thanks
 

DickCappels

Joined Aug 21, 2008
8,000
Note: An LTspice simulation for the project at the moment was posted in https://forum.allaboutcircuits.com/threads/ltspice-question.180567/#post-1650321

Once you get the charging specification you will probably find that you will need a much higher frequency and that may call for Schottky rectifiers rather than the 1N4002's you have in your model.

You used coupling coefficients for your coupled inductors of 1. That might be adequate for the power isolation transformer but it will not be representative of your charging coils.

I noticed an example on the internet that might be of some help:
http://electronoobs.com/eng_circuitos_tut58.php

One other thing, the charger is also a radio transmitter and it might need to have an RF compliance certificate, particularly if this is a commercial product. Check the applicable laws where you plan to make this and do business. I am sure there are places on earth where you cannot even make one for personal use without expensive testing and certification.
 

Thread Starter

Anotida Mushayavanhu

Joined Nov 22, 2020
24
Note: An LTspice simulation for the project at the moment was posted in https://forum.allaboutcircuits.com/threads/ltspice-question.180567/#post-1650321

Once you get the charging specification you will probably find that you will need a much higher frequency and that may call for Schottky rectifiers rather than the 1N4002's you have in your model.

You used coupling coefficients for your coupled inductors of 1. That might be adequate for the power isolation transformer but it will not be representative of your charging coils.

I noticed an example on the internet that might be of some help:
http://electronoobs.com/eng_circuitos_tut58.php

One other thing, the charger is also a radio transmitter and it might need to have an RF compliance certificate, particularly if this is a commercial product. Check the applicable laws where you plan to make this and do business. I am sure there are places on earth where you cannot even make one for personal use without expensive testing and certification.
Ok thanks sir
 
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