Mihai_F
100 W
- Joined
- Oct 11, 2021
- Messages
- 137
Hello community,
i have been working on a big project for the past 6 years , https://www.avrfreaks.net/forum/electric-propulsion-system-ppg-and-ultralights, you can find it here for details, i can post it here also if there is interest.
The main problem that i have is that low side FET-s (IRF150P220) are ringing at turn off, the gate driver are IR2110 with isolated supply on high side. I tried with 15 ohm and 100 ohm gate resistors but the ringing is still there. I attached 2 scope shots with both gate resistor versions an a few photos of the arrangement of the FET-s, the copper on the power board is 1 mm thick. This is the third version of the board (v1.3) and this is the best layout i can do, considering that is in a box and v1.2 flew (check the link). v1.2 was with IRFP4468 and did not have nowhere near such ugly ringing.
![mosfet ringing2.jpg mosfet ringing2.jpg](https://endless-sphere.com/sphere/data/attachments/171/171662-c652e8c596f15c28b79fcf6a4daa6167.jpg)
![IMG_20201219_124842.jpg IMG_20201219_124842.jpg](https://endless-sphere.com/sphere/data/attachments/171/171663-145992255ba448dd023f54960e889a7d.jpg)
![IMG_20210106_143647.jpg IMG_20210106_143647.jpg](https://endless-sphere.com/sphere/data/attachments/171/171664-1c263bc25c56e3b7fcda9b9b6c1e2221.jpg)
![pb1.jpg pb1.jpg](https://endless-sphere.com/sphere/data/attachments/171/171665-70feac32714149c01522848b744277b0.jpg)
i have been working on a big project for the past 6 years , https://www.avrfreaks.net/forum/electric-propulsion-system-ppg-and-ultralights, you can find it here for details, i can post it here also if there is interest.
The main problem that i have is that low side FET-s (IRF150P220) are ringing at turn off, the gate driver are IR2110 with isolated supply on high side. I tried with 15 ohm and 100 ohm gate resistors but the ringing is still there. I attached 2 scope shots with both gate resistor versions an a few photos of the arrangement of the FET-s, the copper on the power board is 1 mm thick. This is the third version of the board (v1.3) and this is the best layout i can do, considering that is in a box and v1.2 flew (check the link). v1.2 was with IRFP4468 and did not have nowhere near such ugly ringing.
![mosfet ringing1.jpg mosfet ringing1.jpg](https://endless-sphere.com/sphere/data/attachments/171/171661-e33f59daea489e5e22b341d4b8cb6719.jpg)
![mosfet ringing2.jpg mosfet ringing2.jpg](https://endless-sphere.com/sphere/data/attachments/171/171662-c652e8c596f15c28b79fcf6a4daa6167.jpg)
![IMG_20201219_124842.jpg IMG_20201219_124842.jpg](https://endless-sphere.com/sphere/data/attachments/171/171663-145992255ba448dd023f54960e889a7d.jpg)
![IMG_20210106_143647.jpg IMG_20210106_143647.jpg](https://endless-sphere.com/sphere/data/attachments/171/171664-1c263bc25c56e3b7fcda9b9b6c1e2221.jpg)
![pb1.jpg pb1.jpg](https://endless-sphere.com/sphere/data/attachments/171/171665-70feac32714149c01522848b744277b0.jpg)