Inductive wireless charging system

This circuit is simple and easy to understand. It generates self-excited oscillation for two MOS tubes, thereby causing the entire circuit to generate high-frequency signals to drive the coil. The induced magnetic field on the coil can be induced by another receiving coil. It is worth noting here that the capacitor we must Using high-frequency MKP capacitors, we can disassemble them in abandoned induction cookers, or buy them in Lichuang Mall. Students who like it can make their own. Specific parameters: 1. Input voltage 12-35V, it will not work below 12V 2. The highest power 200w, the actual measured 300w, we are conservative and 200w 3. For the mos tube, we can choose 20-50A N-channel

Unsoldered circuit board

After welding the circuit board, I used a ring-coated inductor for the inductor. The current can reach 5A. I used a screw type for the terminal. You can use a screwdriver to screw the wire in. We must pay attention to the wire being tightened, otherwise it will cause fire at the receiving end. Simple, it’s just a rectifier bridge. What we need to pay attention to is that the rectifier bridge uses fast recovery diodes. My input voltage is 12V. The wireless charging receiving end can receive a voltage of about 30V. I have uploaded the engineering video. Welcome to comment.