4 Attachment(s)
Buck converter for small wind turbine project
I am currently searching for away to supply the IC’s with Vcc. I am not sure if I should use a 12 volt linear regulator from the 12 volt battery bank or if there is a method to use the large input capacitor at Vin. The voltage at Vin can range form 0 to over 200 volts open circuit and I do not know how fast the buck converter will drain the cap at Vin when the mosfet is oscillating. Comments are welcome.
VAWT Project update using a buck converter
[ame=http://www.youtube.com/watch?v=B3dLzZZ5jKQ]50wattLoad.AVI - YouTube[/ame]
Hi, the video shows manual operation of PMA using a buck converter to drive a 12 volt 50 watt load. Without the buck converter I can not spin the PMA fast enough to illuminate the light because the faster you try to spin the PMA the more it acts like a electric brake. Adding the buck converter delivers more current to the load and the PMA is much easier to spin. The next phase of the project is to adapt the circuit to charge a 12 volt battery bank. Comments welcome and enjoy the day.
Video showing VAWT operation with no load, just for fun, I am happy spring is here
[ame="http://www.youtube.com/watch?v=EKH7DJKxryw&feature=related"]http://www.youtube.com/watch?v=EKH7DJKxryw&feature=related[/ame]
VAWT Project update using a buck converter
Greetings, using a isolated power supply and FOD3180 does work. I am using a blocking diode between the inductor output and the plus terminal of the 12 volt battery. The gate driver is triggering a N channel IRF540 in a Buck circuit configuration and is charging the battery, current about 1 amp. Then I replaced the battery with the 50 watt halogen light and the circuit was able to illuminate the light after I adjusted the duty cycle, current max about 4 amps. I was manually operating the PMA. So far this is a very happy day. The next step is to drive the PMA with the drill press to determine how the circuit behaves at a higher RPM.
Chapter 4. page 69
OhioLINK ETD: Taschner, Matthew
Isolated power supply with FOD3180 gate driver. N channel Buck converter using a IRF540 mosfet. Bottom wave form is gate of mosfet, top wave form is source of mosfet.
Input voltage max about 40 volts. Output current varies depending on duty cycle. Circuit still needs improvement but it is working. Input voltage is from a permanent magnet alternator and is being manually operated. Comments welcome.
BuckConverterUsingIsolatedPS&FOD3180.AVI - YouTube