masterleous
Advanced Member level 4
irf3205 use for ups
I want to discuss about the problem which i am facing...........
I have a Local Microcontroller based UPS in which MOSFETs are used as switching Inverter. Total six MOSFETs are used in 2 Sets of three parallel MOSFETs.
The MOSFETs used here are IRF3205.This UPS has disadvantage that the MOSFETs used here are burning so frequently, (The other UPS of same Model design have same problem).
I tried my best to find out the reason of MOSFET burning but found so many difficulties.....Mostly these MOSFETs burned during Battery Charging process and rarely it got burned during Inverting process. This UPS have a built in circuit of overload detection and it works fine if overload occur. Battery charging is also controlled and protect battery from overcharge.
Last day i resold new MOSFET and start checking its functions of Charging and Inverting. But after few minutes of Inverting Three MOSFETs of same side got burned one after another at the time of NO Load (As i know some UPS are not designed for No Load). After re-soldering more three new MOSFETs its work fine for one whole day (Charging and Inverting). But after one whole day same sides MOSFETs got burned out during Inverting process.
Guys, i am unable to find out the reason of these MOSFET Burning and need your help to troubleshoot this issue. May be this is not a good approach of MOSFET usage. So, for your reference i am uploading the schematic diagram (which i made by tracking of UPS PCB).
Thanks and Regards,
masterleous
I want to discuss about the problem which i am facing...........
I have a Local Microcontroller based UPS in which MOSFETs are used as switching Inverter. Total six MOSFETs are used in 2 Sets of three parallel MOSFETs.
The MOSFETs used here are IRF3205.This UPS has disadvantage that the MOSFETs used here are burning so frequently, (The other UPS of same Model design have same problem).
I tried my best to find out the reason of MOSFET burning but found so many difficulties.....Mostly these MOSFETs burned during Battery Charging process and rarely it got burned during Inverting process. This UPS have a built in circuit of overload detection and it works fine if overload occur. Battery charging is also controlled and protect battery from overcharge.
Last day i resold new MOSFET and start checking its functions of Charging and Inverting. But after few minutes of Inverting Three MOSFETs of same side got burned one after another at the time of NO Load (As i know some UPS are not designed for No Load). After re-soldering more three new MOSFETs its work fine for one whole day (Charging and Inverting). But after one whole day same sides MOSFETs got burned out during Inverting process.
Guys, i am unable to find out the reason of these MOSFET Burning and need your help to troubleshoot this issue. May be this is not a good approach of MOSFET usage. So, for your reference i am uploading the schematic diagram (which i made by tracking of UPS PCB).
Thanks and Regards,
masterleous