hariecengg
Junior Member level 1
Hi Geeks,
I am doing a 250V 50Hz 500W bipolar spwm inverter project using Atmel microocntroller .I successfully generated signals and using look up tables to control output voltage.Now the problem is when i apply spwm signals to the mosfet the mosfet does not turn fully on.I checked the gate voltage it is around 3.15v (Vavg) at spwm duty cycle 70%. The maximum current i am getting only 3A.I tried paralleling of 6 mosfets no improvement only increased 1A more.
So 12V x4A =48W
i am using irf540 logic mosfet and TLP250 driver stage before the mosfet.
How can i increase the current ? what i am doing wrong ?Googled a lot and read many forums but no help !
I am doing a 250V 50Hz 500W bipolar spwm inverter project using Atmel microocntroller .I successfully generated signals and using look up tables to control output voltage.Now the problem is when i apply spwm signals to the mosfet the mosfet does not turn fully on.I checked the gate voltage it is around 3.15v (Vavg) at spwm duty cycle 70%. The maximum current i am getting only 3A.I tried paralleling of 6 mosfets no improvement only increased 1A more.
So 12V x4A =48W
i am using irf540 logic mosfet and TLP250 driver stage before the mosfet.
How can i increase the current ? what i am doing wrong ?Googled a lot and read many forums but no help !