Hi all,
I have implemented a WPT system with communication in both ways using ASK. When I connected communication part on RX side the same way as on TX, there just was not enough amplitude change to be detectable on TX side. So I made communication part using two mosfet and capacitor. That was working well until one of mosfet failed (event that triggered failure was adding load on RX side) causing mosfet driver to also fail (measuring, mosfet is now "short circuit" between S-D-G; mosfet driver is "always on" and getting hot). Used mosfet is IRF100B201, mosfet driver used is MCP1416. Coil Vpp on RX side is 60V when on full load while 45V on "open circuit" (running only microcontroller using 0.03A). Mosfet driver IN is connected to microcontroller PIN that gives 5V while Vdd of mosfet driver is 12V. Why this failed? D-S voltage and G-S voltage were not violated... Can mosfets be used in this way?
Thanks for every opinion while I am really out of ideas what might have happened.
Gabrijel
I have implemented a WPT system with communication in both ways using ASK. When I connected communication part on RX side the same way as on TX, there just was not enough amplitude change to be detectable on TX side. So I made communication part using two mosfet and capacitor. That was working well until one of mosfet failed (event that triggered failure was adding load on RX side) causing mosfet driver to also fail (measuring, mosfet is now "short circuit" between S-D-G; mosfet driver is "always on" and getting hot). Used mosfet is IRF100B201, mosfet driver used is MCP1416. Coil Vpp on RX side is 60V when on full load while 45V on "open circuit" (running only microcontroller using 0.03A). Mosfet driver IN is connected to microcontroller PIN that gives 5V while Vdd of mosfet driver is 12V. Why this failed? D-S voltage and G-S voltage were not violated... Can mosfets be used in this way?
Thanks for every opinion while I am really out of ideas what might have happened.
Gabrijel
Attachments
-
11.8 KB Views: 1