Hi Everyone,

I'm not very experienced in electronics, but I'm very eager to learn more. i have a small wind turbine that generates the output voltage from 5Vdc to 150vdc more or less to charge 12v battery bank so i need a buck boost converter to step up/down the voltage. i am using p channel mosfet irfp9240 (because it was inverting) controlled by 5v arduino mega. but the problem is, i need a suitable optocoupler to drive the mosfet. would you recommend me the good one? is it work if i use tlp521-1? and also i am using different power supply and grounding for the optocoupler. thanks before

 

You could just place a diode between the turbine and the battery, and monitor the battery voltage in case the battery is getting over-charged, but I understand that most people want to use a microprocessor for these things. It's so much more versatile!

http://www.mouser.com/Optoelectronics/Optocouplers-Photocouplers/_/N-6x5ji?P=1yzxnagZ1z0ysg1Z1z1414h

 

You could just place a diode between the turbine and the battery, and monitor the battery voltage in case the battery is getting over-charged, but I understand that most people want to use a microprocessor for these things. It's so much more versatile!

http://www.mouser.com/Optoelectronics/Optocouplers-Photocouplers/_/N-6x5ji?P=1yzxnagZ1z0ysg1Z1z1414h

yes i also placed diode in the buckboost converter ouput and voltage divider to monitor the battery, when the battery is nearly full, then the arduino controll the relay to protect battery from over-charge. but the question is, if i use an optocoupler tlp521-1, would it work to drive the mosfet irfp9240? and the maximum current from pmsg generator is 4,98 A or 3,45 effective current.

 

If you have up to 150 volts at 5 amps to work with I would just ignore the voltage below the ~13 -145 volts it takes to charge the battery. You just don't have much power there to work with anyway compared to the ~750 you have available at the top end.

If it was mine I would use a two stage system that first bucks things down from around the ~ 15 to say 60 - 80 volt generator range with a simple buck converter circuit then switch over to common 12 - 15 volt DC SMPS unit and run it with the higher voltage DC going directly into its normal AC input.

 

Okay
I will grant you mercy and use my exclusive access to secret search engines and answer your question about tlp521 (duntDuntDUN)hum that part
http://www.farnell.com/datasheets/57439.pdf

Decoded it says 55 volts and no higher or damage may result. 50 mA and no higher or magic smoke may escape.

 

If you have up to 150 volts at 5 amps to work with I would just ignore the voltage below the ~13 -145 volts it takes to charge the battery. You just don't have much power there to work with anyway compared to the ~750 you have available at the top end.

If it was mine I would use a two stage system that first bucks things down from around the ~ 15 to say 60 - 80 volt generator range with a simple buck converter circuit then switch over to common 12 - 15 volt DC SMPS unit and run it with the higher voltage DC going directly into its normal AC input.

Unfortunately, in indonesia the potential wind speed is about 1m/s to 6m/s (low wind speed) and based on the modeling system, at 3m/s the output voltage below 12v, so i could not ignore the voltage below 13 - 145.

 

Okay
I will grant you mercy and use my exclusive access to secret search engines and answer your question about tlp521 (duntDuntDUN)hum that part
http://www.farnell.com/datasheets/57439.pdf

Decoded it says 55 volts and no higher or damage may result. 50 mA and no higher or magic smoke may escape.

i use external source for the octocoupler, so i hope it will not cause any damage or magic smoke ya? thank you for your kindness, but i dont need your mercy, and i already have the datasheet.